Mystic Messenger

Protagonist

After suddenly becoming a member of RFA and being forced to live in Rika's apartment, she takes Rika's role and organizes the party that the RFA members have been longing for. Her default avatar comes in 5 various appearances, but she appears to have brown, long silky hair, and is drawn with her eyes hidden under bangs as shown in the CGs.

Jumin Han

Voiced by: Yongwoo Shin

Jumin Han (한주민, Han Ju-min) is a 27-year-old heir of C&R International, a company owned by his father. He have a short black hair, silver eyes and always on a business trip, likes to wear a tuxedo,[lower-alpha 1] and is not used to 'commoner' food. Jumin is a cat lover claiming that only cats understand and are loyal to him. He owns a Persian cat named Elizabeth the 3rd and hates when someone else nicknames her - especially 707, who gives her the nickname "Elly". Due to his very privileged upbringing, Jumin has a very different perspective on the world, which often brings him into direct conflict with Zen. Regardless, he doesn't particularly seems to care what others think about him but does not hesitate to use his authority to help RFA members when one of them is in trouble. He and V are childhood friends due to their family background and them being neighbors and schoolmates.

Jumin is also very close to his father and they often exchange gifts, though mostly each gift is extremely extravagant. He is not fond of his father's many on and off girlfriends. Jumin also loves wine and can hold his alcohol well. He enjoys teasing Zen, and holds a complicated relationship with him.

Zen

Voiced by: Jang Kim

Zen (stylized as ZEN) is the stage name of Hyun Ryu (류현, Ryu Hyeon), a 24-year-old musical stage artist. He has pale skin, red-brown colored eyes and white-colored short hair but long at the back, implying that he's an albino. Despite being a self-absorbed due to his looks, he wants people to acknowledge him for his skills and personality instead. Zen loves to workout and rehearse constantly to perfect his skills. He is seemed to be oversensitive towards Jumin, nicknaming him "Mr. Trust Fund Kid" and refuses any help from him because he reminds him of his brother. He is allergic to cats (specifically cat fur), sneezing even when the word 'cat' is mentioned. Zen is also very protective of the other members, especially the protagonist, and always warned her to be wary of the guys and their 'wolf attitude'. In Another Story, a running joke is how he has a lot of outdated electronic items he picks up from junk yards much to Yoosung's frustration.

Zen has an older brother who is a lawyer. In Zen's storyline it is revealed that he has a difficult relationship with his parents and he left home at age 16 to pursue acting. He owns a motorbike kept in storage and was once rescued by V after an accident.

Zen's birthday is on April 1st and he became the focus in the game's April's Fools DLC.

707

Voiced by: Youngsun Kim

707, or his baptismal name Luciel Choi (최 루시엘, Choi Lusiel) is a 22-year-old genius hacker and intelligence agent, he is also the one who made the RFA Messenger app. 707, also referred to as Seven, is a short red hair, amber eyes self-proclaimed devoted Catholic who loves to eat junk food (especially Ph.D. Pepper and Honey Buddha Chips). He has a very mischievous attitude and loves cats in a 'unique' way. He tends to talk in a very strange way that no other member can understand except the protagonist. His hobbies include collecting sports cars and hacking. His house is so secured that people need to bring an Arabic dictionary to pass the security. Despite his seemingly carefree, easy-going personality, he always warns the other members to "keep their distance" from him because of his job as a secret agent. 707 tends to break the 4th wall more than anyone in the game.

707, whose birth name is Saeyoung Choi (최세영, Choi Se-yeoung), grew up with his younger twin brother, Saeran, in a toxic household. They're illegitimate children whose father was a candidate for a presidential election at that time. This caused their mother to be driven into depression - she asked him for money in exchange for the information of the twins being kept secret, and so she kept them locked up in the house. Being the healthier twin, Saeyoung was tasked to occasionally do some errands which allowed him to briefly leave the house. On his way home, he met various people at a Catholic church as well as Rika who later helped convert him to Catholicism, and he gained his baptismal name Luciel. At the age of 15, Saeyoung was promised by V a better life for his brother in exchange for him working as a hacker and thus had to cease all contact with his family, unaware of what happened in his absence.

Yoosung

Voiced by: Kyuhyuk Sim

Yoosung Kim (김유성, Kim Yu-seong) is a 21-year-old college student and an addicted online gamer of a game called LOLOL (stands for League of Loneliness of Life), a parody of the MOBA League of Legends, he is ranked 2 in the server, with 707 apparently beating him in the first rank. Due to his addiction, he doesn't have time for studying, despite being smart enough to get a scholarship at his school, SKY University, and get an internship offer from Jumin. Yoosung is also Rika's adoptive cousin, Rika was adopted by Yoosung's aunt who immediately regrets adopting Rika. He is unable to move on after her death, whom he admired so much even though they only met when he was a 6th grader.

Rika was Yoosung's biggest influence. She's also the reason in Yoosung taking a medical major. Rika's death apparently hit him so hard that only playing LOLOL could distract him from his sadness. Due to this, he also initially compared the protagonist with Rika so much to the point that he would see her as Rika's replacement.

In Valentine's after ending, he appears to cut his hair, abandoned his hairpins, wears the red-framed glasses that the protagonist gave him in the after ending, and talks in deeper tone.

Jaehee Kang

Voiced by: Jeonghwa Yang

Jaehee Kang (강제희, Kang Jae-hee) is currently the only female member of RFA besides the protagonist. She is a 26-year-old Chief Assistant at C&R International and Jumin's personal assistant. She has brown pixie hair, brown eyes and initially appeared as stoic, serious, and suspicious of the protagonist's sudden appearance. Despite this, she's a big fan of Zen and her personality changes when she's talking about Zen. She tends to be overworked by Jumin and is forced to take care of Elizabeth the 3rd, even though she hates it when cat hair is all over her house. She is also forced to keep her hair short and wears glasses even though she has fine eyesight due to Jumin's policy.

Jaehee's mother married a man who was at least 20 years older than her and died quickly. Her mother died not long after that, forcing a relative to take care of young Jaehee despite their unwillingness. Because of that, Jaehee tends to not rely on other people and is also afraid that if she no longer works for C&R International, something bad will occur. In her route, she takes an interest in coffee and wants to open her own coffee shop. After retiring from C&R International, she let her hair grow and no longer wears glasses. Her route is the only route that is not explicitly romantic.

V

Voiced by: Hosan Lee

V, whose real name is Jihyun Kim (김지현, Kim Ji-hyeon) is 27-years-old and a childhood friend of Jumin and the leader of RFA. He was Rika's fiancé and another person who was driven into sadness after her death. V is very protective of his friends and would rather be put to blame or hide secrets from RFA to keep them from getting hurt. He does not appear in the messenger often, and is often criticized for keeping too many secrets from RFA. It is revealed that he wears a pair of sunglasses to hide his eyes after getting into an accident where he was gradually losing his sight. V's eye injury was caused by Rika during one of her manic episodes. V has always suspected Rika's death was faked and he has been secretly posing undercover in Mint Eye as a disciple to get closer to Rika and Saeran. This is the reason why he has been inactive with the RFA and kept his actions a secret from the RFA, especially from Jumin and 707. In Another Story, he suspected that the protagonist was secretly being held hostage by Mint Eye and attempted several times to rescue her.

In the Secret Ending he is accidentally shot and dies in the process during Saeran's rescue.

Initially being a side character, in September 2017, Cheritz released an Another Story which allows player to develop a relationship with V. The Another Story puts the main character 2 years prior to the main story shortly after Rika's "death". It is revealed that V's mother was a talented violinist who started to lost her hearing during her pregnancy with V. Having an unhappy marriage, his parents divorced and V was separated from his mother. While raised to follow his father's footstep as a businessman, V's mother encouraged him to follow his true passion for arts, particularly drawing and painting.

In the Christmas 2016 DLC it is revealed that V and Jumin often exchanged handwritten letters and that V has poor handwriting

Rika

Voiced by: Hyunjin Lee

Rika (리카) is adored by RFA's members since the organization was founded by her and V, her ex-fiancee. When she was "alive", she wanted to make everyone happy, with one method being a charity party to raise money for those in need. She had severe mental issues from an early age caused by her dad leaving her and her mother committing suicide. Her mental issues worsened after her dog, Sally, wound up dead due to her blindness. It is later found out that Rika is not dead, but instead founded Mint Eye, a cult that is after RFA. She attempts to steal party guests from the RFA to invite to her new organization. She claims that she wants the entire world to be happy, and wishes for them to come to "Paradise." She works with Unknown in Mint Eye and is called Savior by her followers.

Rika is not Yoosung's biological relative. It is revealed that she was adopted by Yoosung's Aunt and Uncle but was treated poorly by her foster parents. She lived in an orphanage for sometime before being adopted and was estranged from her foster parents during the events of Mystic Messenger. She has a great relationship with Yoosung and his family and often encouraged Yoosung to find a positive purpose in life. Rika and V have impacted the lives of all the RFA members, it was Rika who first discovered Zen, encouraged Yoosung to do volunteer work and be a vet, gave Jumin Elizabeth and met Seven and Saeran when they were still children at church.

In Another Story, it appears that Rika may show interest in the main character. One of the Bad Ending route options allows the player to be with Rika.

Unknown / Saeran / Ray

Voiced by: Kang Soo-jin

Unknown (also referred as '???' in the visual novel mode and 'Ray' in Another Story) is a hacker who led the protagonist into Rika's apartment and is part of a mysterious cult called "Mint Eye". Unknown also appears to hold an especially strong grudge towards 707, and is revealed to be his twin brother in 707's route whose real name is Saeran. He appears as an antagonist and caused most of the bad endings in the game.

In 707's Secret Endings 707 rescues Unknown and begins the long process of rehabilitating Saeran from the effects of Mint Eye's brainwashing.

Unknown's real name is Saeran and is the twin brother of 707. He was the weaker of the twins and was often abused and locked up by their mother. Sometime after 707 was recruited into the intelligence agency, Rika and V rescued Saeran but the rescue was short lived as Rika started to slowly groom Saeran to be a hacker and kidnapped and brainwashed him into Mint Eye soon after.

In Another Story, he is called Ray and appears to have a split personality who is referred to as Saeran. As Ray, he lures the main character into Mint Eye under the premise of her testing a game, trying to convince her that people from the RFA are AI's and not real people. While Saeran's personality is darker and wouldn't hesitate to torture people, Ray is very thoughtful and clingy towards the main character and an unwavering loyalty towards Rika.

In the end of his route, his two personalities become one, and he is referred to as Saeran, though the MC can still choose to call him Ray instead.

Vanderwood

Voiced by: Gyuchong Lee[4]

Vanderwood (벤더우드) is another agent working in the same agency as 707, serves as someone who tasked to keep 707 working and to do that, he also cleans 707's house. He brings a taser gun and an Arabic dictionary due to 707's security gate. He initially introduced as 707's maid almost every time and in the earlier versions of the artbook[lower-alpha 2]

Choi Sarah

Choi Sarah is one of the main antagonists of Jumin's route.

Choi Glam

Choi Glam is one of the main antagonists of Jumin's route.

Chairman Han

Jumin's Father

Echo Girl

Echo Girl is the main antagonist of Zen's route.

Believers

Believers only appear in Another Story and are members of the Mint Eye cult.

There are 7 routes in total. 3 routes are available in Casual Story (Zen, Yoosung, and Jaehee), 2 routes in Deep Story (Jumin Han and 707), and 2 routes in Another Story (V and Ray).

The game originally had 2 stories (Casual Story and Deep Story) and 5 routes, until on September 8, 2017, Cheritz released a route for V in a separate story. The story is named "Another Story" and the main character appears a year prior to the time in the original story. On January 31st 2018, Cheritz released a route for Saeran/Ray in the same story. The routes cost 550 Hourglasses in total.[5]

In December 2016, Cheritz added a new "special content" section to the game. The DLC contains new chatrooms, messages, CGs, phone calls, ringtones, and background music. The Christmas episode was added on December 19, 2016; the story lasts for 2 days with 8 endings.[6] The April's Fools episode was added on March 21, 2017; the story lasts for a day with 3 endings.[7] In early February 2017, Cheritz added Valentine's after endings for each character (excluding V and Ray).[8] These special contents remain available even after said events.[9]

The game features two songs - the opening theme is sung by Han titled "Mysterious Messages"[10] and ending song sung by Han and Sirius titled "Like the Sun in the Sky". Both are composed by DoubleTO.

About 23 tracks of background music, composed by Flaming Heart, were released along with the opening and ending song and 13 tracks of free talk with people involved in the making via the game's special package.

In June 2016, Cheritz opened a pre-order session for the game's limited edition special package called RFA VIP Package. The package contains original soundtracks from the game, 2 artbooks, characters' name card, and 2 DVDs of the freetalk session with the voice actors involved in the game. It also contains serial number to unlock the game's VIP membership, which enables player to fast forwarding a chatroom, calling the characters without limits, and 1000 Hourglasses.[1]

In July 2017, Cheritz released dakimakura covers for 707 and Jumin Han, who topped the popularity poll, for Mystic Messenger's first anniversary.[11]

Over the years, unofficial fan-made comics based on the game have been made. By godsend, an official manhwa (Korean comic) is under the works and it already has a prologue, as well as a first chapter. Currently, they can be found in two languages (Korean and English), but talk has been made of the manhwa being available in three more languages.