List of ''Ben 10'' characters

Ben Tennyson

Voiced by:

• Tara Strong - Ben 10 (as 4 and 10 years old), Ben 10: Ultimate Alien (as 10 years old in "Forge Of Creation"), Ben 10: Omniverse (as 5, 10, and 11 years old), and Ben 10 (Reboot; 10 years old and toddler)
• Yuri Lowenthal - Ben 10: Alien Force, Ben 10: Ultimate Alien, Ben 10: Universe (15 and 16 years old) and Ben 10 (Reboot; Elderly)

Portrayed by:

• Graham Phillips - Ben 10: Race Against Time
• Ryan Kelley - Ben 10: Alien Swarm

Benjamin Kirby "Ben" Tennyson (alias "Ben 10") is the main character of the franchise. He is a 10-year-old boy^{[note 1]} from Bell-wood who found the Omnitrix while taking a walk in the woods while on his summer vacation. The Omnitrix attached to his wrist and gave him the power to become different aliens. He uses these powers to defeat evil while trying to escape the alien warlord Vilgax, who chases him to retrieve the Omnitrix.

For most of the series, Ben is shown as a self-centered and cocky boy who only helped people for the benefit of feeling like a hero. This leads Gwen, Max, and others to doubt Ben and they wonder if he has what it takes to be a hero and if he should be holding the power of the Omnitrix. As the series progresses, however, Ben matures and becomes a capable leader in the sequel Ben 10: Alien Force due to Grandpa Max's disappearance and the threat of the High breed invasion. Despite his immaturity, Ben's actions are motivated by a strong and sincere will to help other people; he'll stop at nothing to protect his family and anyone in danger. Though often thought of by many other characters as being stupid, Ben actually proves to be smart and clever when needed, usually showing good skills when the Omnitrix doesn't provide him with the form he wanted.

At some point between the two shows, Ben had removed the Omnitrix and spent several years without it, because he chose to give up his superhero career to have a normal life. Ben found out that his Grandpa Max had mysteriously disappeared while trying to find the truth about what Magister Labrid calls "a plan with Earth in the middle" leaving only a puzzling message for Ben. Despite Gwen's doubts, Ben decided to use the Omnitrix again to find Max. When he toned down his immaturity in Ben 10: Alien Force, he proved to be a capable leader for his team. Ben, Gwen, and Kevin became "Deputised Plumbers". After defeating the Highbreed, Ben grew famous and was celebrated as a hero, which caused him to eventually relax and return to his immature personality. To make it worse, Ben also lost Azmuth's trust after a failed attempt to hack the Omnitrix and unlock its full potential and abilities.

Ben also discovers that himself, his cousin Gwen, his father Carl, and Uncle Frank have alien heritage from an alien species called Anodites, though it is a dormant gene within him and he does not have the same potential that Gwen does. This is proven in the episode “Ben 10,000 Returns” when he magically produced an energy shield to block Eton's ageing ray.

In the two-part series finale of Ben 10: Alien Force, Ben lost the Omnitrix to Vilgax and was later forced to self-destruct it. He then successfully took the Ultimatrix, a redone version of the Omnitrix, from his evil doppelganger Albedo. In addition to the original Omnitrix's shape shifting powers, the Ultimatrix gives Ben the power to turn into larger, more powerful “Ultimate” forms of his aliens. In Ben 10: Ultimate Alien, the public learns Ben's secret identity and he becomes a megastar superhero.

In Ben 10: Omniverse, Ben is assigned a new partner by the Plumbers, Rook Blonko, as Gwen left for college with Kevin. Ben also learns of Under town, where aliens live under Bellwood. After seeing the birth of a universe at the end of the series, Ben decides to take a galactic trip with Rook, Kevin and Gwen.

Gwen Tennyson

Voiced by:

• Meagan Smith - Ben 10 (10 years old)
• Ashley Johnson - Ben 10: Alien Force, Ben 10: Ultimate Alien, and Ben 10: Omniverse (11, 15, and 16 years old)
• Montserrat Hernandez - Ben 10 (Reboot; 10 years old and toddler)

Portrayed by:

• Haley Ramm - Ben 10: Race Against Time
• Galadriel Stineman - Ben 10: Alien Swarm

Gwendolyn Catherine "Gwen" Tennyson is Ben's 10-year-old paternal cousin. She is fifteen years old in Ben 10: Alien Force and sixteen years old in Ben 10: Ultimate Alien and Ben 10: Omniverse.

In the original series, young Gwen shared a love-hate family relationship with Ben. Before discovering her dormant magic powers, she helped Ben using her innate intelligence. She is also a talented martial artist who has received black belts in karate and taekwondo. Gwen is a model student, and in Ben 10: Universe, she is shown leaving for an Ivy League College.

Overall, her most notable skill is her strong magical abilities. Possessing what Charm-caster calls a "magical aura", Gwen can use various magic artefacts, charms, talismans, spell books, and spells. On two occasions, Gwen has used the five Charms of Bezel to become a super heroine named "Lucky Girl". At first, her magical ability drew from the luck-granting Charm of Bezel, which granted her good luck. While wearing the charm, any action she took would result in a beneficial chain reaction that often injured Ben in the process. She later revived her super heroine identity after obtaining the Keystone of Bezel, which greatly increased and strengthened her natural abilities to superhuman levels and granted her superhuman agility, stamina, and endurance. She was later forced to retire when the Charms of Bezel were destroyed. However, in the future, thirty-year-old Gwen went to the mystical inter-dimensional world, in Ben 10: Alien Force, her innate magical abilities have greatly strengthened. She can manipulate pink/magenta-coloured energy to create energy blasts, shields, barriers, ropes, chains, stepping stones, and other weapons and items. She later learns that her powers are not magic, but rather alien, and her paternal grandmother, Verona, is a vastly powerful Anodise alien from a free-spirited alien species who can manipulate and control a supernatural substance called mama, the essence of magic and life itself. Gwen is also able to take on an Anodise energy form when she gets very angered, enraged or stressed. In the mystical world of Ledger Domain, Gwen's innate magical and Anodise powers are both further magnified to even greater levels. She later begins to use her mama to cast spells again.

In Ben 10: Omniverse, she becomes a supporting character instead of a main one, having decided to go to Ivy League College for four years accompanied by her boyfriend Kevin. She frequently visits Plumber Headquarters and sometimes uses her magic to help fight any bad guys she comes across. She is now capable of transforming between her human and Anodite form more freely, but mostly when she gets really angry or whenever the situation becomes too dire.

Max Tennyson

Voiced by:

• Paul Eiding - Ben 10, Ben 10: Alien Force, Ben 10: Ultimate Alien, and Ben 10: Omniverse (54, 59-60, 60-61, 64-65, and 65–66 years old)
• Adam Wylie - Ben 10 (10 years old in "Don't Drink the Water")
• Jason Marsden - Ben 10: Ultimate Alien (17 years old in "Moonstruck")
• David Kaye - Ben 10 (Reboot)

Portrayed by:

• Lee Majors - Ben 10: Race Against Time
• Barry Corbin - Ben 10: Alien Swarm

Maxwell "Max" Tennyson is the 60-year-old^{[note 2]} paternal grandfather of Ben and Gwen. Despite his age, Max has shown on multiple occasions to be a highly athletic and formidable fighter. He takes his grandson Ben gaining superpowers in stride and supports him in any way he can. Max was once a candidate for the Apollo 11 mission and one of the leaders, or "Magisters", of the Plumber organisation, but Ben and Gwen did not know of this at first, believing him to have been a literal plumber. They began questioning this after several incidents in which he displayed skills that a normal plumber would not normally have; from hand signals to a working knowledge of nuclear reactors. Throughout the first season, it seems that Max knows far more about aliens than he lets on, which climaxes in the season finale, where it is revealed that he and Vilgax are old enemies. Before Ben got the Omnitrix, Max tried to keep the Plumbers a secret from his family to protect them, but his plan failed when the Omnitrix and Vilgax came to Earth. Max drives a recreational vehicle nicknamed the "Rust Bucket" that conceals a wide range of Plumber weapons and technology.

Max is an old friend of an alien named Xylene. She, like the other three-eyed aliens of her species, has flight, telepathy, and telekinesis abilities. She intended to send the Omnitrix to Max, but Ben found it accidentally during the camping trip. They seem to have been romantically involved and work well as a team. Xylene tries to convince Max to form a partnership and travel across the galaxy with her, but Max eventually turns her down twice: the first time due to his duties as a Plumber, and the second time due to his love for the kids. He also had a genuine strong and close romantic relationship with an Anodise alien named Verona. They ended up having two sons, Carl (Ben's father), and Frank (Gwen and Ken's father).

In Ben 10: Alien Force, Max plays a part in exposing the Highbreed conspiracy. He destroyed a Xenocyte hatchery by detonating a Null Void Projector, which, after removing its focusing lens, makes a "pretty good imitation of a hand grenade" and produces an explosion that covers over half a mile wide. Max appeared to have been killed in the blast, but was instead sent to the Null Void where, calling himself "The Wrench", he fought against Doctor Animo (who had taken over the Null Void). Once the conflict was over, Max trained a new group of young Plumbers while at the same time informed Ben and the team of any alien threats.

Kevin Levin

Voiced by:

• Michael Reisz - Ben 10 (11 years old)
• Charlie Schlatter - Ben 10 (11 years old in later episodes)
• Greg Cipes - Ben 10: Alien Force, Ben 10: Ultimate Alien, and Ben 10: Omniverse (11, 12, 16, and 17 years old)

Portrayed by:

• Nathan Keyes - Ben 10: Alien Swarm

Kevin Ethan Levin is an 11-year-old^{[note 3]} Osmosian who first appeared in the series as one of Ben's enemies and later became a friend and ally. Believing his stepfather Harvey Hackett convinced his mom to abandon him after he accidentally destroyed his family's house when his powers first manifested, Kevin ended up living in the subway of New York City, where he met Ben and used him to siphon the Omnitrix's vast energies to get back at those who demonized him. However, Kevin was also infused with the DNA of the aliens Ben had access to at the time and became a chimeric hybrid of the alien forms, which rendered him psychotic and unstable.

Later in the series, Kevin ends up in the Null Void where he manages to regain his normal form and master his abilities under the guidance of a fellow inmate. He then escapes and is found by the Rooters, who train him and use his power to turn themselves and the Plumbers Kids into alien-hybrids to further the organization's plan to assassinate Ben. This attempt later ends in failure with Kevin's memories altered to have no recollection of the Rooters, which makes him believe his father was an alien involved with the intergalactic black market. Despite lacking formal education, Kevin possesses a vast knowledge of alien life and paraphernalia. While teaming up with Ben and Gwen during the Highbreed invasion of Earth, the false memories of his father influence Kevin to reconcile with Ben and, over time, he becomes involved in a romantic relationship with Gwen. Kevin has a muscle car, based on a 1970's Dodge Challenger armed with Plumber and other alien technologies.

Although he turned over a new leaf, Kevin still at times acts out of his own interests and has trouble forgiving others. During Vilgax's challenge to Ben, Kevin accidentally mutates himself into a living colossus composed of steel, tadenite, concrete, and wood, so he has to wear an I.D. mask, alien technology used by DNAliens to disguise themselves as humans, uto appear human. During this second mutation, e can turn his limbs into makeshift weapons at will. When the Omnitrix is destroyed, Kevin reverts to normal, but retains his ability to shape shift.

During the events of Ben 10: Ultimate Alien, Kevin absorbs the Ultimatrix's immense energy to stop Ultimate Aggregor, sacrificing his mental stability in the process and becoming a monstrous combination of Ben's most recent aliens. Kevin goes on a revenge spree against anyone who wronged him, despite still retaining some of his heart and humanity—as he spared Gwen's life in "The Enemy of My Enemy" because of their past history. In the two-part episode "Absolute Power", Kevin absorbs the abilities of Alan Albright, Manny, Helen, Pierce, and Doctor Viktor. In a last stand in Los Soledad, Ben (as Ultimate Echo-Echo) finally defeats Kevin and restores him to human form.

During the events of Ben 10: Omniverse, Kevin leaves Bellwood when Gwen moves to Ivy League College and eventually returns as a recurring character while becoming good friends with Rook. However, in "The Rooters of All Evil", Kevin regains his memories of the Rooters and manages to escape them while going on a mission to restore the memories of everyone else involved while confronting Proctor Servantis. However, Ben's interference forces Kevin to bide his time to catch Servantis off guard and break his psionic hold on Alan, Manny, and Helen.

Rook Blonko

Voiced by:

• Bumper Robinson - Ben 10: Omniverse

Rook Blonko is a Revonnahgander from the planet Revonnah. He is a Plumber who was assigned to Ben by Max after Gwen and Kevin left. According to Revonnahgander tradition, Blonko is actually his name because Revonnahganders have their last name first, similar to Earth eastern customs.

He is a top Plumber Academy graduate and a highly skilled fighter. He possesses many Plumber weapons and technology, such as Proto-Tech Armor and the Proto-tool, a shape-shifting weapon that turns into a sword, bow, grappling hook, blaster, etc.

Rook is an extremely skilled fighter with advanced knowledge and training, but he has no actual experience and treats Ben as a superior rather than a friend or partner. It is said that the reason he and Ben are good partners for each other is that Rook is all training, no experience, while Ben is all experience, no training. Rook has limited Earth cultural knowledge and an inability to understand sarcasm, in contrast with Ben's wise-cracking personality. As a result, Ben was initially reluctant to accept the collaboration, even feeling Max forced it, but eventually warms up to him. Rook is well-aware of Ben's hero status and admires him for it.

Towards the end of the series, Rook's performance as a Plumber resulted in his promotion to the rank of Magister. In the future seen in "The End of an Era," he is to assume the office of Magistratus, previously held by Max. By this point, Rook understands metaphors well and uses his original lack of understanding them as a joke between him and Ben.

The Plumbers

The Plumbers are a special police force that operate in the universe. While some work on Earth, most work in different parts of the universe.

Among the known Plumbers are:

Plumber's Helpers

This group is made of the children of Plumbers, most of which are superpowered alien-human hybridss. Max trained them after the Highbreed war; they eventually became his pupils. utoIn the season 3 premiere, Max and the other Helpers try to take down Vilgax in the park but they were stomped out of the way. The Helpers returned in Ben 10: Ultimate Alien in "Absolute Power" Pt. bu eKevindrained pt Cooof hirf his pow.ial.

Azmuth

Voiced by:

• Robert David Hall – Ben 10
• Jeff Bennett – Ben 10: Alien Force and Ben 10: Ultimate Alien
• René Auberjonois – Ben 10: Omniverse
• David Kaye – Ben 10 (Reboot)

Azmuth is a thousand year old Galvan (Grey Matter's species), as well the genius who created the Omnitrix and the first Galvanic Mechomorphs. Azmuth is an extremely intelligent being, even as far as Galvans go, Azmuth's scientific prowess and achievements have made him a respected scientist even to the other Galvans, Paradox has even called him the smartest being in the universe.

A thousand years ago, Azmuth was in a relationship with a female Galvan named Xenith whom he promised to not harness the primal forces of the universe. But the planetary system they saw in perfect alignment inspired Azmuth to create Ascalon which can tap into the fundamental forces of the universe. Besides losing Xenith's love, Azmuth realized too late the consequences of creating such a weapon when Ascalon fell into the hands of an Incursion who ends up unintentionally destroying his homeworld in an attempt to end the eons-long civil war on it. A distraught Azmuth vowed to hide sword and gave it to Sir George, who used the weapon to defeat Diagon with the weapon sealed along with the entity's heart.

Soon after, Azmuth dedicated himself to peaceful sciences as his penance to the universe and Xenith, creating the Omnitrix as tool of peace with a twofold purpose: promoting inter-species understanding by allowing other beings to experience different ways of life and as a genetic repository to prevent the extinction of a species. But Azmuth became disgusted when those like Vilgax saw its possible uses as a weapon. This causes Azmuth to go into hiding before being found by Ben who needed his help to deactivate the Omnitrix's self-destruct sequence, convincing him there is still hope for the universe as he enable Ben to access Way Big and returned to Galvan Prime. Since then, Azmuth became more optimistic as he attempted to make up for lost time such as attempting to aid Malware as shown during the events of "Trouble Helix".

In Ben 10: Alien Force, Azmuth's former assistant Albedo creates a copy of the Omnitrix. After the copy nearly destroyed a galaxy, Azmuth shows up and punishes Albedo by breaking his Omnitrix, leaving him de-powered and trapped in Ben's human form, before sending him to prison. He then stated that Ben is the only one who used the Omnitrix for good, and decides to let him find his own way to use it rather than advise him, saying that he has far more difficult challenges ahead and that he isn't the only one who believes Ben is the only one who thinks so. Later, as Galvan Prime was conquered and destroyed, Azmuth and Paradox warn Ben that the Highbreed are conquering planets and their fleet is heading towards Earth. Although Azmuth preferred Ben not joining the fight, he see no point in stopping him and activates the Master Control for the sake of the battle. When the Master Control was reset by the DNA wave Ben used to stop the Highbreed, Azmuth left to help rebuild Galvan without reactivating it. He shows a no-nonsense attitude towards the High-Breed's plan to eradicate Earth and he warmly tells Ben that there are more difficult battles to be fought in the future.

Following Diagon's defeat, Azmuth removes the Ultimatrix and places a new perfected Omnitrix on Ben. When asked by Ben if he is ready to learn the Master Code, Azmuth states that he'll consider this by Ben's 18th birthday. During Ben 10: Omniverse it was revealed that Azmuth was responsible for the accidental creation of the Galvanic Mechamorphs, including the corrupt one he dubbed Malware. He made efforts to repair Malware but failed, and Malware's impatience turned to hatred for his creator. This would lead to him forming an alliance of villains in an effort to eliminate Azmuth, who would also have to contend with Albedo.

Ship

Voiced by:

• Vyvan Pham - Ben 10: Alien Force, Ben 10: Ultimate Alien and Ben 10: Omniverse

Ship is a symbiotic of canine behavior produced by a Galvanic Mechomorph (Upgrade's species) named Baz-El. He possesses the same powers as Upgrade, but can also alter his form to mimic any device he has come into contact with. Ship became the transportation of Ben's team until Ben 10: Ultimate Alien when Kevin got the Rust Bucket III. Ship's vocabulary is limited to the word "ship", the message its creator had sent it to deliver, the word is adopted as the creature's name, but it turns out that Julie seems to understand what he says to her, although in "The Eye of the Beholder", Ship speaks his first word other than "ship" which is "Julie", when he choose to be with Julie instead of Baz-El, which he wanted to sell him as a weapon.

Ship first introduced in "Pier Pressure", where since there, he became Julie's pet, after Baz-El gave him to her, Julie really cares about him, and so as Ship, having developed an attachment to Julie, also she treats him as a normal pet, not as a powerful weapon, as most of people see. Ship also can shape shift into different shapes and forms of technology, from his spaceship form to a protective battle armor employed by Julie.

Paradox

Voiced by:

• David McCallum - Ben 10: Alien Force, Ben 10: Ultimate Alien, and Ben 10: Omniverse

Professor Paradox is a biologically immortal time traveler who can transverse time through sheer will. Paradox been described as a calm, free-going man; he talks much like a stereotypical scientist, with his dialogue requiring higher knowledge to understand completely. His character is inspired by the Doctor from Doctor Who.

He was originally a scientist from 1952 who discovered special properties in quartz crystals and received government funding to work on breaking a hole in the Space-Time Continuum, code-named the Paradox Project, with his assistant Hugo at the military base Los Soledad during the Cold War. But a slight miscalculation caused Paradox to get sucked into the Event Horizon, where he remained displaced from time for 100,000 years. Losing his mind and regaining his sanity, he gained a complete understanding of the Space-Time Continuum. Having long forgot his name, he renamed himself Paradox. At some point in his career, Paradox separated the pieces of the Map of Infinity, which could lead a person to the Forge of Creation, and hid them across the universe, disguising them as difficult-to-obtain objects to prevent the map from falling into the wrong hands. Paradox also met Ben's future self in his adventures prior to meeting the future hero's younger self.

In his first appearance in Ben 10: Alien Force, Paradox soon learns that the accident that gave him his power also sent an extra-dimensional creature fifty years from the time of the experiment. Meeting Ben as they confront the creature, Paradox learns the monster is actually Hugo and manages to negate the monster's existence by keeping his friend from getting sucked it. After returning to Ben's present, Paradox was shocked that he didn't figure it out first as he gives an older Hugo to a look at eternity.

In the Ben 10: Ultimate Alien episode "Ultimate Aggregor", Paradox informed the team that Aggregor was using his old time travel equipment to achieve his goals. He also gave Kevin advice concerning the future, telling him that things would get worse before they got better, and to try to remember who his friends were. He also warned Ben "not to lean against the chronal randomization barrier", but doubted that he would listen. In "The Forge of Creation", Paradox appears to help the team to go to the Forge of Creation which is outside the universe, but is unable to stay with them as he "is not allowed to go within 500 lightyears" of Celestialsapiens, per their treaty. Paradox later returns in "Ben 10,000 Returns", aiding Ben and his future self against Eon. Before taking his leave, Paradox leaves Ben with a cryptic warning concerning Sir George and Dagon.

Returning in the Ben 10: Omniverse series, wearing steampunk attire, Paradox is revealed to have been fighting a time war as he is pursued by Eon for the Chrono Navigator he possesses. But with Ben's help, Paradox protects the timeline though the restoration erased their meeting during that time. He would later join forces with 16-year old Ben and his future self Ben 10,000 on several other occasions to counter the threat of Eon and his benefactor, the rogue Chronosapien Maltruant. In the end, he and Ben succeeded in locking Maltruant in a time loop which he is unaware of in which he is defeated, repaired by his minions, and then defeated again.

Jimmy Jones

Voiced by:

• Scott Menville - Ben 10: Ultimate Alien, Ben 10: Omniverse

James "Jimmy" Jonah Jones is a 10-year-old kid who is a major fan of Ben, and he found out Ben's secret and revealed it to everyone on the planet.

He runs a website with pictures of aliens around the world, including every alien Ben has ever turned into. He watches Ben by alerting him about any alien activity he finds via the internet. In "Andreas' Fault", Jimmy is revealed to have a secret informant in the Forever Knights in the form of Foreverduke838 (whom Jimmy met online), Ben realizes that Jimmy is very useful for letting him do what he wants, even giving Ben "relationship advice" and helping on fights, as seen in "The Big Story", when Jimmy helped to save them, retrieve the Ultimatrix for Ben, and defeat the plant alien.

He wears a hoodie similar in design to Ben's jacket and has his old pants from the original series. Jimmy sent out a video that finally showed the world that Ben has the ability to turn into aliens, as he thought Ben would like the attention and money. He now helps Ben in some episodes, but gets cut short by his mother who wants him to take part in aerobics.

In Omniverse, he has more reddish-brown hair and a jacket in same design to Ben's jacket in Alien Force and Ultimate Alien. Later in the show, a character named "Chrono Spanner" is introduced, who had weaponry from the future and helped Ben and Rook. When they recruited Jimmy as a spy, they saw a series of coincidences when Jimmy would disappear and Spanner would appear, and Spanner would disappear and Jimmy would appear. Ben and Rook suspected Jimmy he was Spanner, but had no evidence to prove it

Aggregor's Prisoners

These aliens are from the Andromeda Galaxy that were kidnapped from their planets by an Osmosian named Aggregor, who wanted to absorb the full powers and abilities of the five aliens he captured using a machine he had built back on his home planet and make himself invincible so he can obtain the "Ultimate Prize". All of them escaped from Aggregor's ship using a shuttle and crashed landed on Earth on the coast of Florida; afterwards, Galapagus, P'andor, Andreas, and Ra'ad each split up to find a way off the planet while Bivalvan stays with the shuttle and attempts to repair it, but all the aliens were later recaptured.

In "Ultimate Aggregor", after regaining all of the prisoners, Aggregor releases them but he takes control of their minds and has them attack Ben and his friends to gain more time for his plan be successful. When Aggregor used the machine to drain the aliens powers, they faded away.

In "Absolute Power" Pt. 2, all the aliens that Aggregor killed and drained were brought back to life after Ben and the others stopped Kevin, releasing their powers.

Sir George

Voiced by:

• Peter Renaday - Ben 10: Ultimate Alien

Sir George is the First Knight blessed with immortality at his birth, having founded the Forever Knights over a thousand years ago. For reasons unknown, George left the order and has been in hiding for centuries. He has a coin with the infinity symbol (∞), the same symbol as the seal that held the Lucubra.

George was born as Georgius in Ancient Rome in 231 AD. He acquired immortality at some point by unknown means, living for over 900 years, before becoming a knight in the medieval era. Sir George forged the seal that kept the Lucubra in the 4th century, and in 1131 he also defeated another extra-dimensional creature known as Diagon with the sword Ascalon, created and given to him by Azmuth, because he said that George was worthy enough to wield its terrible power. George carved out Diagon's heart and pinning it to the ground with the sword, he sent it back to its dimension (probably by using magic as stated), becoming the basis for the legend of Saint George and the Dragon.

In the 1930s, he moved to the Bellwood Senior Village and lived there for over 70 years and where he first appeared in "The Creature From Beyond". He had a coin with the same symbol as the seal that held the Lucubra. He somehow knew when the seal was destroyed and left. At the end of the episode he was seen looking at the damaged seal, and then leaving. In "Prisoner Number 775 is Missing", Sir George arrives at Area 51, where he attacks the guards and removes the base, turning it into a new Forever Knights stronghold.

In "The Purge", Sir George appears during a meeting between Enoch, Driscoll, Patrick and Urian. After a brief fight with Driscoll, he is identified as the founder of the Forever Knights and unites the factions into one. Sir George's first order was the Forever Knights target the aliens living on Earth and remove them whatever way possible. He later sends Driscoll to lead the Forever Knight soldiers into attacking an alien air-lift area that Ben was guarding. Upon learning of Driscoll's defeat, Sir George is not disappointed as it was just a distraction for a bigger plan. Sir George has Driscoll lead the Forever Knights while he is away and to have the Forever Knights ready upon his return, "for the battle of 100 lifetimes". Sir George has been on a quest for several days since it to find Ascalon and Diagon's heart so that he might destroy the heart. Using a long series of calculations, Sir George found when and where the shrine that holds the sword and heart would appear next. Through the Flame Keepers' Circle and Vilgax hindered his quest, George reclaimed Ascalon and was restored to his youthful self as he prepares the Forever Knights for an epic confrontation against Diagon while promising to give Ben the sword should he fail to stop the menace.

In "Beginning of the End" and "The Ultimate Enemy", when the Flame Keepers' Circle make their move, George goes to Diagon's cave and he finds Vilgax breaking the seal before battling him after killing Conduit Edwards. But once Vilgax freed Diagon, George is killed by him and Ascalon goes to Ben's possession where he finished what he started. In the end, Ascalon returned to Azmuth alongside the Ultimatrix.

Alternate Versions of Ben Tennyson

Big Ed

Voiced by:

• Patrick Cox - Ben 10: Alien Swarm

Big Ed is a human who appeared in Ben 10: Alien Swarm; he is in charge of the car workshop Kevin works at in his spare time.

Cash and JT

Cash is voiced by:

• Dee Bradley Baker – Ben 10
• Matt Levin – Ben 10: Alien Force and Ben 10: Ultimate Alien
• Roger Craig Smith – Ben 10 (Reboot)

Portrayed by:

• Tyler Patrick Jones – Ben 10: Race Against Time

JT is voiced by:

• Adam Wylie – Ben 10
• Yuri Lowenthal – Ben 10: Alien Force (In "Ben 10 Returns" Pt. 1)
• Scott Menville – Ben 10: Alien Force (In "The Gauntlet") and Ben 10: Ultimate Alien
• Max Mittelman – Ben 10 (Reboot)

Portrayed by:

• Tyler Foden – Ben 10: Race Against Time

Cash Murray and JT are Ben's former bullies from school. Cash is taller and has darker skin, JT is shorter and wears glasses. JT and Ben were best friends in the first grade before Cash moved to Bellwood. They are modeled after series producers Sam Register and Tramm Wigzell. In the very last episode of the original episode where Vilgax attacks Bellwood, Cash and JT hid behind a car and spotted Ben, Gwen, Max and Ben's father, Carl. they saw that Ben transformed into "one of the alien heroes on the news," and Ben revealed it to them that he was every one of the alien heroes.

In Ben 10: Alien Force, Cash and JT found an alien tech gauntlet in Kevin's car that shot lasers. While taking turns using the Gauntlet, Cash became addicted to the weapon's power, and attacked JT when he tried to take it from him. After beating Kevin and declaring himself the "coolest guy in the neighborhood" Cash challenged Ben to a one-on-one battle. With JT's support, Cash realized that the armor was controlling him, and broke free of its power. Since then Cash and JT have been more friendly towards Ben, and are among the first to show their support when Ben's identity as a "hero" is exposed to the public.

In the Ben 10: Ultimate Alien pilot episode "Fame", Cash and JT applaud Ben at school after his secret has been exposed. In "Reflected Glory", they try to take credit for Ben's plans, and use Oliver Thompson to help them to make a TV show in which they claim to be the brains behind Ben 10. Psyphon, on a mission to gain the "Power Decouplers" for the Forever Knights, goes after JT and Cash since they claim to be the brains behind Ben 10 and are therefore responsible for the defeat of Vilgax, Psyphon's master. In order to save themselves, JT and Cash are forced to admit they were lying about everything causing Psyphon to turn his attention to Ben only. At the end, Ben was being killed by Psyphon, so they use the Power Decouplers to shoot Psyphon, taking him out and saving Ben's life, however, the shot breaks Oliver's camera, destroying everything they recorded, including the scene where they save Ben. With no footage and its stars discredited, Oliver subsequently cancels the show.

Tetrax Shard

Voiced by:

• Dave Fennoy – Ben 10 and Ben 10: Alien Force
• Todd Haberkorn – Ben 10 (reboot)

Tetrax Shard is a Petrosapien (Diamondhead's species) mercenary, and the first alien species of the Omnitrix that Ben had met.

Tetrax was originally a selfish bounty hunter until he accepted the job to steal his people's sacred crystal and deliver it to Vilgax. After the galactic warlord used it to destroy his home world Petropia, Tetrax felt guilty, and became concerned about who he worked for, and started trying to be sure Vilgax would not get other weapons of mass destruction (such as the Omnitrix).

Under the alias of Hoverboard in his first appearance for his namesake flying device, Tetrax was hired by Vilgax with Kraab and Sixsix to take the Omnitrix from Ben. However, it's soon revealed he's actually working for another unnamed force that wants him to assure Vilgax doesn't get the Omnitrix. When he initially meets Ben, he criticizes his lack of strategy, and tries to take Ben with him in order to deliver the Omnitrix to his true hirer. When Kraab and Sixsix then choose to team up against Tetrax, Ben is able to use strategy to defeat the two of them, causing the Petrosapien to agree to let him stay on Earth, since the Omnitrix is in good hands.

Tetrax comes back in "Ben 10: Secret of the Omnitrix", where he helps Ben and Gwen travel in space to find Azmuth so he can disable the Omnitrix's self-destruct mode.

Tetrax also plays a role in "Ben 10: Destroy All Aliens", where he comes to Earth to find Ben after picking up a signal from the Omnitrix. He locks Ben from transforming back into human for his own good, and is also sucked into the Omnitrix.

In Ben 10: Alien Force, Tetrax discovers the Petrosapien Crystal was actually a backup for his planet and his people, containing all their memories and DNA. Learning this, he stole it from Vilgax and freed Sugilite (Chromastone's genetic donor) from the Omnitrix, so he could use the crystal to bring back Petropia. Despite Vilgax almost killing Sugilite, the planet is brought back thanks to Ben.

In the reboot, Tetra first appears in "Omni-Tricked" to prevent Vilgax's restoration alongside Sixsix and Kraab. He then returns in "Bounty Ball" where he and his group were hired by a mysterious employer who offered them a fortune to retrieve the Omnitrix, only to fail while being unmasked and warning Ben that others will come for him.

The Galactic Enforcers

The Galactic Enforcers are a group of alien "super heroes" that Ben first encountered in their titular episode. Ben was part of the team only in that episode; he was only recruited because he had the Omnitrix. Ben resigned after realizing that he would be better without them.

In the episode "Ben 10,000", set 20 years into the future, Ben's otherwise perfect patrol route left them out of a job and they were forced to clean up after Ben, bringing the criminals he captured to the authorities. Near the end of the episode, Ben lets them deal with the Circus Freaks while he attends Grandpa Max's birthday party.

They appear briefly in the beginning of the third-season episode "The Vengeance of Vilgax" Pt. 1. Vilgax was attacking their home-planet T-K, and challenged Ultimos to a duel but Tini and Synaptak apparently interfered with the duel causing Vilgax to attack the two and then defeat Ultimos. Vilgax then drained his powers with the help of Psyphon and then claimed their planet as part of his empire.

Myaxx

Voiced by:

• Vanessa Marshall – Ben 10: Secret of the Omnitrix
• Vyvan Pham – Ben 10: Alien Force

Myaxx is a female Chimera Sui Genris (Vilgax's species) Azmuth's assistant, where she helped him in the creation of the Omnitrix, collecting several DNA samples for the Codon Stream, including the ones for Floraunas (Wildvine's species) and Ectonurite (Ghostfreak's species). However, since Azmuth didn't give her the credit she deserved, she left a genetic signature in the Omnitrix overwriting his, and walked away. Despite being a good fighter as well as the same species as one of the most dangerous warlords in the universe, she's quite a coward who doesn't like fighting and would rather try to walk away or escape if she has the chance.

In "Ben 10: Secret of the Omnitrix", Ben, Gwen and Tetrax finds her in the Prison Satellite Incarceron. Ben confuses her with Vilgax and attacks. After the confusion is cleared, Myaxx tells the group that she's the creator of the Omnitrix so they can get her out of prison, but is forced to tell them the truth once they escaped. She still agrees to show them where Azmuth is, as well as putting a device on the Omnitrix to reflect the Omnitrix's energy blasts back inside it (the energy blast only happen when the Omnitrix is in self-destruct mode). When Vilgax comes to the planet Xenon (where Azmuth is), Myaxx helps Tetrax and Ben, despite her cowardice, fight Vilgax's minions. After Ben defeats Vilgax, Azmuth offers for her to be his assistant again. Though he admits he won't be able to treat her better than before, she agrees, preferring to be his assistant rather than go back to Incarceron.

Myaxx appears at the beginning of "The Final Battle: Part 1" warning Azmuth that Albedo stole the Ultimatrix. Her look is completely changed, giving her a more feminine appearance, red armor and pink eyes.

Carl & Sandra Tennyson

Carl is portrayed/voiced by:

• Dee Bradley Baker - Ben 10, Ben 10: Destroy All Aliens
• Don McManus - Ben 10: Alien Force, Ben 10: Race Against Time
• Yuri Lowenthal - Ben 10: Ultimate Alien

Sandra is portrayed/voiced by:

• Tara Strong - Ben 10, Ben 10: Destroy All Aliens
• Vyvan Pham - Ben 10: Alien Force (In "Ben 10 Returns Pt. 1")
• Beth Littleford - Ben 10: Alien Force (In "Grounded") and Ben 10: Ultimate Alien, Ben 10: Omniverse, Ben 10: Race Against Time

Carl Tennyson & Sandra Tennyson are Ben's parents and Gwen's uncle and aunt, Carl is Max and Verdona's son, Frank's brother and Sandra is Max and Verdona's daughter-in-law who first appeared in the final episode "Goodbye and Good Riddance". In the live action film Ben 10: Race Against Time, Carl is depicted as a new-age style parent who wants Ben to have his "freedom," insisting on being called Carl, not dad, and Sandra insisting on being called Sandra, not mom and letting Ben run off on mysterious adventures without asking questions. He seems to be even more laid back than his wife, and is seen at least twice telling her to let Ben have his fun. Sandra reveals that Ben is lactose intolerant.

They appear in the Ben 10: Alien Force episode "Grounded", when they grounded Ben after finding out that he has been using the Omnitrix without permission or informing him and his wife. Later, they help Ben defeat a Highbreed and allow him to keep his Omnitrix. However, they eventually realize that Ben is the only one who can save the world from the Highbreed, and allow him to continue.

In the Ben 10: Ultimate Alien episode, "Hit Em Where They Live," Carl is oblivious to the fact that Vulkanus, Charmcaster, and Zombozo were a few feet away and about to attack him and that Ben, Gwen, and Kevin were battling them while he was putting a spare tire on his car. Sandra was kidnapped by Zombozo, but is later rescued by Gwen as her Anodite form.

Baz-El

Voiced by:

• Rob Paulsen - Ben 10: Alien Force and Ben 10: Ultimate Alien

Baz-El is a Galvanic Mechomorph whose name wasn't revealed until "Vreedle Vreedle".

Baz-El is a pilot who crashed and spawned Ship to find someone who could help him; he wanted help from Ben because he thought he was a Plumber, and before he left, he allowed Ship to stay with Ben and Julie. In "Vreedle, Vreedle" where he hired the Vreedle Brothers to retrieve Ship, without knowing of their incompetence, he appeared in the court where he lost the trial on who kept Ship.

Baz-El returned in Ben 10: Ultimate Alien episode "Eye of the Beholder" where he was stealing crystals from the ruins of a planet inhabited by the Churls and been caught by the Stone Guardians. However he reveals that he has a job scanning the atmosphere of various planets and makes money on the side by stealing artifacts from the planets he scans as part of his "retirement plan." This is how he earned the scorn of the Churls. When Ship felt him being in danger, and attempted to go and save him, Ben, Julie, Gwen and Kevin followed. After Baz-El was saved, Julie, believing Ship was better with him, attempted to give him back to him, but Baz-El insincerely stated he was going to sell Ship as a weapon causing the minute Mechomorph to choose to stay with Julie.

Verdona Tennyson

Voiced by:

• Barbara Bain - Ben 10: Alien Force (Elderly human form)
• Juliet Landau - Ben 10: Alien Force and Ben 10: Ultimate Alien (Anodite form and teenaged human form in "Moonstruck")

Verdona Tennyson is Max Tennyson's wife, mother of Carl and Frank Tennyson, paternal grandmother of Ben and Gwen, and also could see that she is great-grandmother of Big Chill's proliferation. She is an Anodite alien from the distant planet Anodyne, who Gwen inherited the vast abilities of the control and manipulation of magenta/pink-colored life energy (referred to as manna, chakra, chi, or Quintessence) the very lifeblood substance of all magic and life itself. Like all Anodites, Verdona is a free-spirited being. Though sometimes acting more mature and grown-up, she mostly acts like a playful child. There is also another side of Verdona which is somewhat amoral and uncaring, for example when she almost destroyed Ben and Kevin when they first confronted her, only being stopped by the intervention of Gwen and learning who they really were. Likewise she was also willing to destroy her granddaughter's physical human body to release the Anodite lying dormant deep within her.

Verdona and Max had met in the beginning of the 1960s, in 1962, during President John F. Kennedy's presidency. Verdona left Anodyne in an unspecified time and was brought to Earth by a robot alien called Synthroid, who had captured her and wanted to use her to power his world. They crashed and landed in St. Louis where she met and fell deeply in love with Max after he saved her; they then courted each other and married. During this time she hid her Anodite heritage very well and blended in with society. During their time together, Verdona hid from Max that she knew about his occupation as a Plumber, prompting Max to always lie to her every time he left. Eventually after a long, happy and yet somewhat distant relationship, they parted.

They had two sons together, Carl and Frank, though neither of them showed any signs of inheriting Verdona's incredible abilities. When they were grown up and out of the house, she returned to Anodyne; after so many years on Earth, Verdona wanted to get back in touch with her background. She came back to Earth once to see if any of her grandchildren had inherited any Anodite abilities and powers from her, but saw that none did. Only several years later, she found out that Gwen, her granddaughter had developed powers and abilities of her own. It should be noted that Big Chill is in fact Ben, which makes Big Chill's offspring Verdona's great-grandchildren but it is unknown if they even could inherit her powers and abilities or if the energy from the Omnitrix will prevent them from having "the spark."

Verdona apparently favors Gwen over Ben; due to the fact that he did not inherit any powers (magical or Anodite-like) from her. This led her to put him to one side in her focus and/or ignore him as shown when she magically conjured tape on his mouth so that he could not speak. However, after their final fight against each other did Verdona saw just how much Ben cares about Gwen, leading the two to reconcile and part on good terms afterwards. She also has an uncanny sense of humor that was passed on to Ben. Arguably, Ben inherited his grandmother Verdona's spirit, sense of humor and overconfidence, while also inheriting his grandfather Max's determination, adventurous, bravery, and self-sacrificing attitude. Verdona has been shown to be a strict disciplinarian and to be serious when she needs to be, such as when Sunny went way out of line.

In Ben 10: Race Against Time, Max told Ben that his paternal grandmother had died, although this may have been a lie until the time was right to tell his grandchildren about their paternal grandmother being an alien from another world.

Verdona appears for the first time in "What Are Little Girls Made of?" when she explained everything to Gwen about her alien inheritance. She offered Gwen the chance to come back with her to Anodyne to reach the full potential of her powers and abilities (which would require seventy-five years), but Gwen had refused the offer. Verdona then shed her human body, revealing her true Anodite form. Thinking that Gwen was too young to make her own decisions, decided to destroy Gwen's human body to free the Anodite lying dormant inside. Ben and Kevin then stepped in to defend Gwen and, after the brief battle, Gwen explained to Verdona that she would rather stay on Earth with her friends and family. Verdona then tells Gwen that she wished that Max had been an energy being like them, expressing her deep longing for him, hinting that her desire to take Gwen with her could be just a front to fill the void in her heart. Verdona then promised to return every so often to see how Gwen was doing.

One year later, Verdona eventually returned in "Girl Trouble", where she was able to overpower Sunny (who was attacking Gwen). She then took Sunny and her boyfriend Antonio back to their home planets and allowed their parents to deal with them. Again, she was disconcerted when Gwen refused her offer to come with her to Anodyne.

The truth of how Verdona arrived on Earth and fell in love with her human husband is revealed in Moonstruck in the form of memories belonging to Max Tennyson. As a young Anodite, Verdona was taken from her world by a sentient and autonomous robot (known as a Synthroid), who intended to use her like a battery-due to her being made entirely of pure energy-and forcing her to fully energize the world of the Synthroids' for many years until it drained her dry. Fortunately, for Verdona, the spaceship was shot down by a seventeen-year-old Max, which allowed Verdona to escape but not before the Synthroid attached a metal bracelet on her wrist that turned into a humanoid teenager and rendered most of her abilities useless; except telepathy. Meeting Max in a diner, Verdona told the young man that he was the only one who could help her. The two then began to grow close and develop romantic affections for each other. after escaping another attack by the Synthroid, Verdona told Max who she was truly from and why the robot was after her. Max tried to break the bracelet neutralizing most of her powers, but failed. The Synthroid then knocked her unconscious and took Verdona to his ship. Using the strong telepathic link they now shared, Max came to save her. With the help of Magister Labrid, Verdona regained her Anodite form and full powers. She offered to take Max with her to show him the endless wonders of outer space. Knowing that she could not persuade him, Verdona expressed her romantic feeling for him in the form of a passionate kiss before flying off, promising to meet again.

Frank Tennyson

Voiced by:

• George Newbern

Frank Tennyson is Gwen Tennyson's father, the brother of Carl, uncle of Ben, and son of Max and Verdona. He only appears in "What Are Little Girls Made Of?".

Natalie Tennyson

Voiced by:

• Juliet Landau - Ben 10: Alien Force and Ben 10: Ultimate Alien

Natalie Tennyson is Gwen's mother, Ben's aunt, and the wife of Frank Tennyson (Carl's brother). She looks like Gwen, with shorter hair. She appears first time in "What are Little Girls Made Of" when Verdona comes to Earth to visit Gwen and Frank. She has shown to be displeased with the heritage of Verdona.

Lili doesn't seem to be particularly too fond of the Tennyson family, as she is usually complaining about them by saying they're not as "formal" as her side of the family, possibly due to the fact that some of them are not completely human. She also said that Ben has bad table manners while castigated her father-in-law's fashion sense. She was also seen to have disagreements with her mother-in-law Verdona, making piericing stares at each other at every given opportunity. This animosity between the two is yet to be explained.

She appears later in the Ben 10: Ultimate Alien episode "Girl Trouble" where her niece Sunny stays with them for a while despite Gwen's objections. She later reappears in "It's Not Easy Being Gwen," where she has Gwen help out with writing and mailing out letters to her side of the family for a regal-like party. She shows in this episode that she is as fond of Ben and Grandpa Max as Verdona, noting that Max's food is inedible and Ben doesn't have the best table manners.

Reinrassic III

Voiced by:

• Richard McGonagle – Ben 10: Alien Force

Reinrassic III (also called Reiny) is a Highbreed, the seventh son of the Noble Highbreed House of Derazza, direct descendant of the Pure Blooded High Order of Rarsect.

He was first introduced in "Alone Together", where Ben was forced to work with him while trapped on the desert planet Turrawuste, though they needed each other to survive (indeed saving each other on multiple occasions), Reiny showed the typical Highbreed hatred of who they wrongly call "lesser species", forcing Ben to walk ten paces behind him and insulting him constantly, even yelling at him for touching him while saving his life. Due to not being accustomed to human introductions, when Ben introduces himself as "Ben, Ben Tennyson", Reinrassic refers to him then on as "Ben Ben Tennyson". Reiny eventually lost his hand saving Ben from a Rodilla Dentia, and then he used Swampfire to reattach it back, much to the Highbreed's surprise. Eventually they made it to the teleporter, but due to him forming a friendship with Ben, he banishes himself to Turrawuste, believing himself tainted by him.

He returns playing a brief but important role in the final battle with the Highbreed in "War of the Worlds: Part 2", after Ben healed the genetic damage in all Highbreed by fusing them with alien DNA. Reinrassic was unaffected by this because of his healing from Swampfire, as the vine used to reattach his arm has now spread up to his elbow and changed his DNA as well. He, despite his original self-imposed exile, realized that the Highbreed's views on other species were wrong and that being fused with another alien's DNA wasn't a curse, but rather allowed them to survive. This caused the Highbreed Council to elect him as the new Highbreed Supreme, the leader of all Highbreed. He then called off the invasion and showed Ben respect.

In "If All Else Fails", Reinrassic III aided Ben to stop a Highbreed Failsafe weapon left over from the war, which had been activated by a Highbreed Officer who was unaware the war was over. He told the officer that he is now the Highbreed Supreme, showing the Imperial Seal. He ordered the officer to shut the weapon down, but the officer revealed once it was activated it cannot be stopped. However Ben and Gwen came up with a plan to enter the weapon and deactivate it from the inside and managed to stop it. The Highbreed Officer took control of it, preventing it from destroying a Nuclear powerplant. Reinrassic congratulated Ben for stopping the weapon, but Ben revealed the Highbreed Officer's sacrifice. However, Reinrassic told Ben that the Highbreed who died was a soldier doing his duty and that there was no greater honor for a Highbreed.

Elena Validus

Portrayed by:

• Alyssa Diaz - Ben 10: Alien Swarm

Voiced by:

• Tia Texada - Ben 10: Ultimate Alien and Ben 10: Omniverse

Elena Validus is the daughter of ex-Plumber who appeared and had a large role in the live-action film, Ben 10: Alien Swarm. According to the movie, she hung out with Ben and Gwen. During this time she and Ben became close, he helped her join the school soccer team, speaking up for her when the other players wouldn't let her join and eventually became the team's MVP. She was Ben's first major crush, but she was forced to leave Bellwood after her father Victor Validus was caught stealing alien tech from the Plumbers (Max never told Ben or Gwen why Elena and her father moved away). She eventually discovers her father had been taken over by the Hive Queen and seeks help from Ben and the Plumbers. As Nanomech, he goes into her dad and he kills the Queen, who controlled the Nanochips. Elena's father was freed, but apparently died shortly after the events of the movie.

Elena returns in the Ben 10: Ultimate Alien episode "Revenge of the Swarm", where she is shown studying the remaining Nanochips. After meeting with Ben to discuss a strange series of events involving Nanochips, Elena begins to display a disturbing attraction to him, which eventually leads to her kidnapping Julie in an attempt to ruin her relationship with Ben. When Ben finds Julie bound and gagged inside one of Elena's locked rooms, Elena goes berserk and reveals that the Nanochips she had been studying had taken over her body. After nearly killing Ben, Elena eventually regains control of her body long enough to seemingly commit suicide by walking directly into a Nanochip-destroying force-shield that she had developed. Though Julie attempts to comfort Ben by telling him that the real Elena had likely died a long time ago, Ben tells her that he thinks that a part of Elena must have survived long enough to save his life. However, some nanochips start to reactivate themselves after Ben left. Later in "The Perfect Girlfriend", Elena was revealed to be alive despite her sacrifice but returns to her villainous ways when she disguises herself as Julie. In her Julie form, Elena tried to do everything possible to make Ben happy. She also injured Gwen's ankle by pushing her down an elevator shaft and attacked Kevin with a duo of building-monsters while he was spying on her but Ben defeated it. Once Ben finds out that Julie is actually Elena, he fights her but loses after she chokes him with nanochips. Julie tells Elena that if she kills him, then no one can have him. At the end of the episode, Elena retreats "knowing what hate feels like" and promises to return.

Unlike other Plumber's Kids, Elena is completely human, and has no known special powers (at least in her first appearance). However, she is a capable fighter and exceptional martial arts (skilled in both armed and unarmed combat). According to Ben she is also great athlete, becoming their school soccer team's "Most Valuable Player". A Galvan Plumber instructor also mentioned she was one of his best students, and might have become a great Plumber. While processed by the Queen, she displayed the ability to transform into a full size Nanomech/Human Hybrid, with the powers to control the Chips and shape them into whatever shape she pleased.

Elena returns in the Ben 10: Omniverse episode "The Most Dangerous Game Show".

Victor Validus

Portrayed by:

• Herbert Siguenza - Ben 10: Alien Swarm

Voiced by:

• Brian George - Ben 10: Ultimate Alien

Victor Emilio Validus is the father of Elena and an ex-Plumber. He is the former pupil of Max, who planned on passing command of the Plumbers to Validus and retires. However, he was discovered stealing alien technology (a serious violation of Plumber regulations). Feeling deeply betrayed by Validus, Max did not believe him when he explained that the alien technology he stole was in reality an alien species known as the Hive.

Prior to the movie, Validus was studying the chips to find a weakness. During his studies he became host to the Queen of the hive, using his plumber knowledge the queen upgraded the chips and later used his body to mass-produce the chips

Victor reappears in "Revenge of the Swarm". He was presumed dead, his cause of death was unknown. His daughter Elena found some of the Nanochips and studied them. It turned out that she was being controlled by them, and could make them shape shift into anything.

Colonel Rozum

Voiced by:

• John DiMaggio - Ben 10: Ultimate Alien

Colonel Rozum is a United States Air Force officer with access to high-profile information, even about the existence of the Plumbers, and has personally known Max Tennyson.

He first met Ben and the team in "Fame", where he was stationed at a base in Florida overseeing the construction, and later investigating the theft of the high-powered rocket engines being developed by NASA to advance Earth to interstellar travel, using an experimental engines that used a form of controlled nuclear explosion as a means of propulsion. They were targeted by Bivalvan.

He returns in "Ultimate Aggregor", Rozum is given the case and is aware of what the government considers to be a failed time travel experiment, the Paradox Project, using an Entropy Pump to generate a weakness in the fabric of space-time allowing travel through time. Rozum was frustrated that Ben's team already knew about the project, due to it taking him years of hard work to gain the clearance necessary. He wanted their help to stop Aggregor from using the Entropy Pump, giving his military strength to assist them should they need. It is in this encounter that he reunites with Max Tennyson (which may have been from Max's days as an astronaut given Rozum's connections to NASA) and meets Professor Paradox for the first time, where he initially refers to Rozum as Major.

He also appeared again "Prisoner Number 775 is Missing" when area 51 was attacked. Max was outraged to find out that Area 51 was a prison for any aliens that had been caught by Rozum and the military, without due process. One of the Prisoners escaped, and attempted to get revenge on Rozum for his unjustified decades of imprisonment that cost him the life of his family by targeting Rozum's family. After Prisoner 775 was defeated by Ben and taken in by the Plumbers, Rozum showed no remorse over the situation of the prisoner, declaring that he was serving his country and planet, severely putting a strain on his relationship with Max and the team.

Rozum would return in Ben 10: Omniverse in "Blukic and Driba Go To Area 51," where he knew Max Tennyson as a young Air Force officer and became involved in the attempts by the alien Benevelon to invade Earth.

Eunice

Voiced by:

• Molly Quinn – Ben 10: Ultimate Alien

Unitrix (Uni means one, in contrast of Omni meaning all) also known as Eunice is a prototype of the Omnitrix created by Azmuth which can absorb, contain and recall the DNA of different species.

Eunice was first introduced in "The Transmogrification of Eunice", when Azmuth lost her, and he hired Sunder to find her. When Ben, Gwen and Kevin find an alien pod, when Gwen opened it she ended up cut by the pod door and the Unitrix became a blonde-haired girl who was unaware of her past. After Gwen gave Eunice some of her extra clothes, Ben got a crush on Eunice and so as she. During the scuffle with Sunder in a muddy area, Azmuth arrived and cleared things up. He stated that Eunice was actually a Unitrix, a prototype of the Omnitrix created when he wanted to preserve alien DNA. Following a brief argument, Ben allowed Azmuth to take on Eunice as one of his assistants on Galvan Prime as a compromise. Azmuth also states that when Gwen cut her hand trying to open the pod containing the Unitrix, her human DNA was sampled and then randomised it (which explains why she has blond hair) creating Eunice's human form.

In her true form, she is a cylinder core, similar to the Omnitrix and Ultimatrix, however, the core resembles a container instead of a watch, but does feature a control dial that, when pressed down, turns it to its mobile DNA form (in this case, Eunice). As a prototype Omnitrix, the Unitrix is capable of storing DNA of different species, unlike the Omnitrix and Ultimatrix, she is not connected to the Codon Stream or Primus, limiting it to a single DNA sample. Eunice was also shown to be able to absorb DNA and powers of several animals and then to manifest traits of these animals without changing form, the powers and abilities she absorbs from aliens and animals last for about ten minutes. She managed to copy the hopping abilities of a rabbit, the strength of a bear, and the flexibility of a snake. There is also a green rectangle on the back of her neck and when Sunder pressed it, it turned her back to the Unitrix. In addition, local wildlife seemed to be attracted to her to the point where normally shy animals would gather around her and render more dangerous animals (like a bear or snake) docile towards her and others, this capability was likely included by Azmuth as a way for the Unitrix to easily obtain DNA samples from them, possibly to protect her and the item from danger since it's only temporary and the Unitrix can only contain one DNA sample. She also received an upgrade to have a one way link subspace link to Primus for uploading DNA samples. However, having the link active can cause parallel signal interference which could cause the Ultimatrix to lose its connection to Primus until it's shut off.

In "Simian Says," Eunice (now sporting a different outfit provided by Azmuth) goes to investigate the Arachnichimp's planet when she doesn't detect their DNA in Primus' Codon Stream. She helps Ben and company fight Mizaru and the Xenocyte-possessed Arachnichimps. When Eunice got infected by the Xenocyte, Ben was able to hit the button on her neck causing Eunice to regress back into the Unitrix. Eunice made a silent cameo in the Ben 10: Omniverse episode "The Most Dangerous Gameshow", as one of the females abducted by Charles Zenith to participate in an intergalactic competition to win Ben's hand in marriage.

Winston

Voiced by:

• Patrick Cavanaugh – Ben 10: Ultimate Alien

Winston is a member of the Forever Knights and a squire to Sir Cyrus.

He was attacked by the Lucubra and turned into a mind-controlled slave. He was seemingly cured when Gwen sent the Lucubra back to its home dimension. However, like everyone attacked by the Lucubra, Winston becomes a thrall of Diagon and unconsciously becomes an Esoterica.

In "A Knight to Remember", Winston is a FKC member because he had been mind controlled by the Diagon. Under its control he informed the rest of the Flame Keepers' Circle of where to find Diagon's heart and Ascalon. When Vilgax gained the sword and the heart, Winston, still under the control of Diagon, tricked Vilgax into breaking open the Seal into Diagon's dimension and reuniting Diagon with his heart.

He is killed by Conduit Edwards in "The Beginning of the End" when he saved Sir George. He had been declared a Forever Knight by Sir George in death after Sir George avenged Winston's death.

Ignatius Baumann

Voiced by:

• Richard Doyle - Ben 10: Ultimate Alien
• Corey Burton - Ben 10: Omniverse

Ignatius Baumann is a human shopkeeper that owns an alien grocery store on Earth, having known Ben Tennyson since he was five years old and has been a victim of the kid's actions indirectly damaging his store, which intensified since he gained Omnitrix. Baumann is formally introduced in the Ultimate Alien episode "The Purge" when Ben and his team wanted to ask about the Forever Knights at the time when the Forever Knights have been hunting aliens on Earth.

Baumann reappears in the Ben 10: Omniverse episode "The More Things Change" Pt. 1. When Ben comes to the store to defend it against Bubble Helmet, Fistina, and Liam (who were working for Psyphon in his racketeer activity), Baumann begs him to leave but ends up despairing from the resulting fight. In "Special Delivery," Ben's fight with Thunderpig ends up wrecking Baumann's car. Baumann has Ben perform deliveries to him without the involvement of the Omnitrix. When Ben manages to finish his deliveries, Baumann gets his car fixed but is mortified after seeing his house destroyed by a food delivery truck that Ben knocked out of Earth as Way Big a year ago returning from orbit.

In "The Frogs of War" Pt. 2, Baumann allows Gwen, Kevin, Blukic, and Argit to use one of the hidden rooms in his store to make a plan to stop the Incurseans. In "The Ballad of Mr. Baumann" it is revealed that Baumann has been romantically involved with an aquatic female alien since her arrival on Earth, and he eventually proposes marriage to her and obtains an alien suit to allow him to interact with her at will.

Zed

Voiced by:

• Paul Eiding - Ben 10: Omniverse

Zed is a dark blue Anubian Baskurr who resembles a dinosaur and dog. She has spiky hair, red eyes, and black lines on her neck and legs. Zed used to wear a red spiked collar with the Nemetrix symbol on it, but now wears a light blue collar with a gold bone dog tag as Kevin's pet.

Pakmar

Voiced by:

• Tara Strong - Ben 10: Omniverse

Pakmar is a short alien and self-employed entrepreneur who first appears in Ben 10: Omniverse. A running gag in the series is that his business ventures are constantly being accidentally destroyed by Ben.

He first appeared in "The More Things Change" Pt. 1, when his Toilet Emporium had been destroyed as part of Psyphon's protection racket.

In "Of Predators and Prey" Pt. 1, Pakmar is shown to have started a pet shop in Undertown when Ben arrives looking for a dog whistle that matches the whistling that commands Khyber's Dog. Pakmar was still angry at Ben for being partially responsible for the destruction of his Toilet Emporium. The pet shop ends up destroyed during Ben's fight with Kyber's Dog. In the episodes that Pakmar appears in Omniverse, he opens a new business that it is destroyed by Ben in "Showdown" Pt. 2, where he goes to the Plumbers to complain about Ben. An alternate Pakmar appeared in "It's a Mad...Ben World," where he cruelly hordes Benwood's water in the employ of Mad Ben only to have his operation destroyed by the normal Ben.

Professor Blarney T. Hokestar

Voiced by:

• Charlie Adler - Ben 10: Omniverse

Professor Blarney T. Hokestar is an alien con artist, seeking profit yet he is not maliciously attempting any crime; in simpler terms, he is the least dangerous criminal Ben has to put up with. Ben first meets him in "Have I Got a Deal For You" where he was working on a miracle elixer that is made from a small Screegit. When Pax tricks Ben into freeing the Screegit from its cage enough for it to be exposed to Earth's nitrogen and grow to giant size, Professor Hokestar helped Ben by telling him how to defeat the Screegit. After Pax and Solid Plugg were arrested by the Plumbers and the Screegit is in the custody of the Plumbers, Ben tells Professor Hokestar that if he ever comes near the Screegit, he will have him handcuffed to Pax for a year.

In "Store 23," Ben, Blukic, and Driba find Professor Hokestar operating the 23rd Mr. Smoothy restaurant which contains a dimensional transporter that Professor Hokestar was using to sell Mr. Smoothy drinks to different dimensions. One of these dimensions is Dimension 23 where Ben meets that reality's version of Ben. While Ben works with his Dimension 23 counterpart, Professor Hokestar helps Blukic and Driba work to get the dimensional transporter working. With help from Dimension 23's Azmuth, Professor Hokestar, Blukic, and Driba were able to perfect the dimensional transporter.

In "Otto Motives," he is seen in an auto show of Khoros.

In "Collect This," Professor Hokestar creates an intergalactic television show based on Ben Tennyson's adventures with the help of Solid Plugg and a Lenopan actor named Deefus Veeblepister playing Ben.

Pax

Voiced by:

• Eric Bauza - Ben 10: Omniverse

Pax is a crazed Florauna activist who is not evil at heart but his love for wildlife, especially dangerous animals, places himself and others in danger on a regular basis. Pax first debuts in "Have I Got a Deal for You" when he tricks Ben into freeing the Screegit from Professor Blarney T. Hokestar's ship, unaware of how it would be effected by Earth's atmosphere. When the Screegit went on a rampage, Pax tried to stop Ben and Professor Hokestar from what he perceived to as doing harm to the Screegit. After the Screegit was returned to normal size, Pax was arrested by the Plumbers despite his good intentions. In "Store 23," Pax makes a poster cameo at the time when Feedback was chasing Liam.

In "Rad," Pax returns where he stowed away on Rad Dudesman's ship called The Lucky Duck where he plans to keep the dangerous Gracklflint safe. During a fight with the Incurseans, Pax ended up captured by some Incursean soldiers yet manages to escape when the Gracklflint starts attacking the Incursean soldiers. After the Gracklflint is used to cure Magister Amux and his crew of the venom, Ben assures to Pax that the Gracklflint will be let free on its planet and Rad just says that as long he gets paid.

Kraaho

The Kraaho are a species of hot-blooded tungsten-based aliens that thrive on warm temperatures. When Earth reaches 100 degrees Fahrenheit during a summer day, it is still too cold for pure-blooded Kraaho. Half-breeds like Ester found it slightly nippy; however, cooler weather in "Rules of Engagement" didn't seem to bother her.

Hobble

Voiced by:

• Steven Blum - Ben 10: Omniverse

Hobble is an unidentified alien that is a member of the Plumbers' Alpha Squad. Despite this, he is depicted as an extremely cowardly individual, often fleeing in terror from dangerous situations. His diminutive size is accompanied by poor physical abilities, with his species' main advantage being a protective layer of mucus secreted by their skin that leaves them immune to Corropturas. Hobble briefly had a crush on Charmcaster in "Charmed, I'm Sure", but it went unreciprocated.

Rad Dudesman

Voiced by:

• Carlos Alazraqui - Ben 10: Omniverse

Rad Dudesman is a duck-like alien who is a mercenary-for-hire and a smuggler. He is skilled at the use of advanced weaponry and pilots a spaceship called the Lovely Duck. As revealed in his debut episode, he has three middle names: Profit, Trouble, and Danger. He is occasionally employed by the Plumbers to carry cargo and passengers, and has thus met and worked with Ben on a number of occasions. The first was in "Rad" where he helped transport a dangerous creature whose venom was needed to help several Plumbers. He then appeared in the trilogy "Rad Monster Party", "Charmed, I'm Sure", and "The Vampire Strikes Back", in which he became stranded on Anur Transyl with Ben, Rook, and Hobble of the Plumbers. He became quite annoyed with Ben due to Ben's destruction of a needed replacement part, and later became one of Lord Transyl's unwilling minions.

Scout

Voiced by:

• Carlos Alazraqui - Ben 10: Omniverse

Scout is a Loboan Plumber from the Anur System and is one of the few Plumbers who are stationed in the Anur System. He attended the Plumbers' Academy with Rook. He is forced to build and look for parts needed to for his equipment. Scout explains that he was inspired by Ben's exploits to get his home system ready for joining the rest of the universe.

Skurd

Voiced by:

• David Kaye - Ben 10: Omniverse

Skurd is a Slimebiote who becomes attached to Ben's Omnitrix. When attached to an alien, he can feed on the alien DNA and is able to grow his host's body parts from himself. When attached to the Nemetrix or Omnitrix, Skurd could grow the body parts of an alien and use it as an armor or new power for himself and the wielder by spreading to their respective body parts and then shifting into another alien's limb or something based on another alien. This allows a sapient wielder to remain sane by not using the Nemetrix directly. Furthermore, Skurd has a high tolerance for Neural Shifts, which prevents him from going insane as well. He is able to give Ben the powers of the other aliens such as a Diamondhead or Armadrillo arm as well as a Bloxx arm cannon, an Echo Echo megaphone and even Wildvine arms.

Skurd first appears when Khyber seeks him out in search of a new host for the Nemetrix, and Skurd is soon convinced to aid him. However, after an initial encounter with Ben, Skurd begins to covet the Omnitrix's much greater store of DNA, and abandons Khyber when they are confronted by Ben a second time. He then becomes Ben's unwanted companion for much of the remainder of the series, though his abilities do prove helpful. Ben eventually goes to Azmuth to see about having Skurd removed, only to realize how helpful the Slimebiote was and reunite with him in order to defeat Malgax. After the defeat of Maltruant, Skurd learns that his kind were created by the ancient race known as the Contemelia, who created the universe to spread DNA, and willingly parts ways from Ben in order to join his primordial brothers at their task.

Todd

Voiced by:

• Max Mittelman - Ben 10 (Reboot)

Todd is a man with brown hair and wears a light blue T-shirt and khaki pants that first appeared on Waterfilter among with his fiancée Sally. Their moments were directly or indirectly ruined by Ben.

Sally

Voiced by:

• Tara Strong - Ben 10 (Reboot)

Sally is a woman with blond hair and wears a pink dress.

Shady Looking Dude

Voiced by:

• Josh Keaton - Ben 10 (Reboot)

Shady Looking Dude is a wrestler that appeared on The Ring Leader. He has brown hair and black eyes, wears black make-up, black bracelets with grey spikes on them, grey and black suit and black boots.

He fought Four Arms at the Midwest Wrestling Smackdown and attempted to blind him with a crystal ball, but failed due to Four Arms wearing googles and as a result, he was defeated.

Steve

Voiced by:

• David Kaye - Ben 10 (Reboot)

Steve is an announcer at Midwest Wrestling Smackdown (among with his partner Bill) that wears a grey and black cowboy hat, golden rings, grey suit on top of a white and black shirt, and a golden necklace.

It seemed they had a great appreciation for Iron Kyle, until they found out Iron Kyle is a guy in robot suit, much for their disappointment.

Bill

Voiced by:

• Roger Craig Smith - Ben 10 (Reboot)

Bill is a chubby man of short stature. He wears glasses, a white shirt with a black suit on top, a red bow tie, has a brown Walrus mustache and a brown hair and also one of the announcers at Midwest Wrestling Smackdown.

Glamour Man

Voiced by:

• John DiMaggio - Ben 10 (Reboot)

Glamour Man is a wrestler that has well developed muscles and blonde hair, wears blue wrestling clothes and dark blue and white shoes and knee braces, and a grey bracelet with spikes on his left knuckle. He distracted Four Arms in order to beat him, but ended up punching himself.

Starshine

Voiced by:

• Tara Strong - Ben 10 (Reboot)

Starshine is one of the people living in the Docile Dragon Domicile and took a vow of silence in order for the Docile Dragon to keep asleep. She first appeared in the episode Shhh! and has brown hair and eyes, a flower necklace on her forehead, wears a blue gown, and brown sandals.