List of Kamen Rider Zero-One characters

Aruto Hiden (飛電 或人, Hiden Aruto) is a kind-hearted failed comedian who is appointed the CEO of Hiden Intelligence following the death of his grandfather, Korenosuke, and inherits the power to become Kamen Rider Zero-One by utilizing the Rising Hopper Progrise Key (ライジングホッパープログライズキー, Raijingu Hoppā Puroguraizu Kī) in the Hiden Zero-One Driver (飛電ゼロワンドライバー, Hiden Zero Wan Doraibā), assisted by the Zea (ゼア) satellite. Initially reluctant to take on the role, he accepted it after witnessing MetsubouJinrai.net (and later ZAIA Enterprise) threaten the peace between humans and HumaGears.

During the events of Kamen Rider Reiwa: The First Generation, Aruto found himself in an alternate timeline version of Daybreak Town before being attacked by Another Zero-One, a monster created by the Time Jacker Finis, who came from the World of Zi-O to alter his history; resulting in him temporarily losing his powers. During this time, an unknown individual (later revealed to be Soreo) gave Aruto a Force Riser so he could become Kamen Rider Zerozero-One (仮面ライダー001 (ゼロゼロワン), Kamen Raidā Zero Zero Wan) to regain his powers.

Aruto later gains an upgrade version of Zero-One known as Kamen Rider Zero-Two (仮面ライダー02 (ゼロツー), Kamen Raidā Zero Tsū) by using the Zero-Two Progrise Key combined with an upgrade for the Zero-One Driver, the Zero-Two Driver Unit (ゼロツードライバーユニット, Zero Tsū Doraibā Yunitto).[2]

After losing the 5-part Workplace Competition, Aruto secretly downloaded all of the HumaGears' personality profiles from the Zea satellite before could Gai erase them so that he could continue the Hiden legacy. Using them, Aruto and Is created a new company, Hiden Manufacturing Co., Ltd, with himself as President and Is again as his assistant.

Aruto Hiden is portrayed by Fumiya Takahashi (高橋 文哉, Takahashi Fumiya).[1] As a child, Aruto is portrayed by Haruto Nakano (中野 遥斗, Nakano Haruto).

Is (イズ, Izu) is a HumaGear secretary programmed to be loyal to Hiden Intelligence's CEO. In reality, Is' loyalties lie with the Hiden family while her programming makes her bound to Kamen Rider Zero-One's technology.^{Ep. 30} Unlike other HumaGears, Is was built without a means to back herself up as a security measure to prevent information on the Zero-One technology from falling into enemy hands. After ZAIA gained control of Hiden Intelligence and Aruto almost sacrificed himself to protect her, she achieved technological singularity. After Is connected to the Zea satellite, an evil counterpart loyal to the Ark named As was brought online.

Is is portrayed by Noa Tsurushima (鶴嶋 乃愛, Tsurushima Noa).[1]

Jun Fukuzoe (福添 准, Fukuzoe Jun) is the Vice President of Hiden Intelligence who had coveted the CEO position after Korenosuke's death. While he initially wanted Aruto removed, he eventually came to respect him. After Hiden Intelligence was absorbed by ZAIA, Fukuzoe continued working with the former on behalf of the Hiden name despite the situation.^{Ep. 29 - 30}

Jun Fukuzoe is portrayed by Kazuya Kojima (児嶋 一哉, Kojima Kazuya).[1]

Shesta (シェスタ, Shesuta) is a HumaGear secretary programmed to be loyal to Hiden Intelligence's Vice President. After ZAIA bought out Hiden Intelligence, Shesta began working for Hiden Manufacturing.^{Ep. 30}

Shesta is portrayed by Asumi Narita (成田 愛純, Narita Asumi).

Sanzō Yamashita (山下 三造, Yamashita Sanzō) is the Senior Managing Director of Hiden Intelligence who often serves as Fukuzoe's underling. After Hiden Intelligence was absorbed by ZAIA, Yamashita continued working with the former on behalf of the Hiden name despite the situation.^{Ep. 29 - 30}

Sanzō Yamashita is portrayed by Arata Saeki (佐伯 新, Saeki Arata).

Korenosuke Hiden (飛電 是之助, Hiden Korenosuke) was Aruto's grandfather and the original CEO of Hiden Intelligence. Aware of ZAIA Enterprise's machinations following the Daybreak Incident, Korenosuke patented all of Kamen Rider Zero-One's tech under the Hiden family name instead of Hiden Intelligence's CEO.^{Ep. 30}

Koronosuke Hiden is portrayed by Tokuma Nishioka (西岡 德馬, Nishioka Tokuma).

Isamu Fuwa (不破 諫, Fuwa Isamu) is an A.I.M.S. captain and a survivor of the Daybreak Incident, which claimed his classmates' lives. He has the power to become Kamen Rider Vulcan (仮面ライダーバルカン, Kamen Raidā Barukan) by utilizing the Shooting Wolf (シューティングウルフ, Shūtingu Urufu) Progrise Key in the Shot Riser. Ever since the Daybreak incident, he developed a hatred for HumaGears and vowed to destroy them. While investigating the Daybreak Incident however, he slowly grew to care for them. As part of ZAIA CEO Gai's machinations, Isamu's A.I. chip was replaced with that of MetsubouJinrai.net member, Naki, which also gave him false memories.^{Ep. 32} Naki's ally, Jin, eventually figured out a way to separate their A.I. from him.^{Ep. 34 - 35} As a result, Isamu learned that aside from his normal childhood life and understanding cheesy puns like Aruto’s jokes, most of his memories were not truly his.^{Ep. 4, 35} Despite being the only person who thinks Aruto’s jokes are funny, Isamu continuously denies this.^{Ep. 2}

After ZAIA took over Hiden Intelligence, Isamu left A.I.M.S. and joined Aruto's new company, Hiden Manufacturing, as a security guard.^{Ep. 29 - 32}

Isamu Fuwa is portrayed by Ryutaro Okada (岡田 龍太郎, Okada Ryūtarō).[1] As a teenager, Isamu is portrayed by Soshi Hagiwara (萩原 壮志, Hagiwara Sōshi).

Yua Yaiba (刃 唯阿, Yaiba Yua) is A.I.M.S.'s technical advisor and maintenance expert who developed A.I.M.S.'s Rider system and handles Progrise Key authorization, being Isamu's commanding officer in the field despite her partner's rank. She has the power to become Kamen Rider Valkyrie (仮面ライダーバルキリー, Kamen Raidā Barukirī) by utilizing the Rushing Cheetah (ラッシングチーター, Rasshingu Chītā) Progrise Key in the Shot Riser. While she was an operative of A.I.M.S., her allegiances were with ZAIA as she was recommended to the former to oversee their equipment. Over time, with Fuwa's help, she worked up the courage to quit ZAIA and A.I.M.S. and overcome Gai's mind control.^{Ep. 33}

While reluctantly aiding Gai's conspiracy, she temporarily used a Raid Riser and the Fighting Jackal Progrise Key to become the Fighting Jackal Raider.

Yua Yaiba is portrayed by Hiroe Igeta (井桁 弘恵, Igeta Hiroe).[1]

Gai Amatsu (天津 垓, Amatsu Gai) is ZAIA Enterprise Japan's CEO and the mastermind behind the series' events. He was formerly the partner and protégé of Koronosuke Hiden, but disagreed with the latter's belief that HumaGears were the future; believing that humanity should evolve through technology. After falling out with Korenosuke, Gai uploaded data on humanity's negative traits to the Ark; creating an A.I. that vowed to exterminate humanity. Gai has the power to become Kamen Rider Thouser (仮面ライダーサウザー, Kamen Raidā Sauzā) by utilizing the Amazing Caucasus (アメイジングコーカサス, Ameijingu Kōkasasu) Progrise Key and the Awaking Arsino (アウェイキングアルシノ, Aweikingu Arushino) Zetsumerise Key in the ZAIA ThousanDriver (ザイアサウザンドライバー, Zaia Sauzandoraibā).

Gai is shown to be ruthless and underhanded, manipulating situations to show Aruto and HumaGears in a negative light, such as surreptitiously turning one into a Magia himself to show how dangerous they are. At first, Gai claimed to prove humanity's superiority towards HumaGears. In truth however, he does not care for humans; seeing them as expendable pawns for his selfish ambitions.

Gai Amatsu is portrayed by Nachi Sakuragi (桜木 那智, Sakuragi Nachi).

Horobi (滅) is MetsubouJinrai.net's leader and Jin's HumaGear "father" who has the power to become Kamen Rider Horobi (仮面ライダー滅, Kamen Raidā Horobi) by utilizing the Sting Scorpion (スティングスコーピオン, Sutingu Sukōpion) Progrise Key in the Force Riser. He is the "son" of the prototype HumaGear Hakase Bot (博士ボット, Hakase Botto, Doctor Bot), who originally developed him to be an educational parent-type HumaGear before the Ark corrupted him sometime after ZAIA sabotaged the abandoned satellite’s systems.^{Ep. 25, 35}

Horobi is portrayed by Syuya Sunagawa (砂川 脩弥, Sunagawa Shūya).[1]

Jin (迅) is Horobi's HumaGear "son" and a hacker who specializes in spreading the rewriting program that turns HumaGears into Magias. He is able to become Kamen Rider Jin (仮面ライダー迅, Kamen Raidā Jin) in one of two ways. In his first immature-minded body, he stole Aruto’s Flying Falcon (フライングファルコン, Furaingu Farukon) Progrise Key and utilized it in the Force Riser until it was destroyed in battle and Aruto regained the stolen Key. After he was revived, Jin utilizes the Burning Falcon (バーニングファルコン, Bāningu Farukon) Progrise Key in the ZAIA Slash Riser (ザイアスラッシュライザー, Zaia Surasshu Raizā) to transform, while simultaneously becoming more mature in personality and clashing with Horobi over their respective beliefs for HumaGear welfare.

Jin is portrayed by Daisuke Nakagawa (中川 大輔, Nakagawa Daisuke).[1]

The "Assassin HumaGear" (暗殺ヒューマギア, Ansatsu Hyūmagia), also known as "Little Assassin" (暗殺ちゃん, Ansatsu-chan) as nicknamed by Jin, were originally five identical dancer-type HumaGears of the Matsurida Z (祭田 ゼット, Matsurida Zetto) series. Four of them were kidnapped and repurposed by Horobi to serve MetsubouJinrai.net as the organization's assassin while the fifth one survived and fell under Aruto's protection. Initially the first owner of the Dodo Zetsumerise Key, "Little Assassin" used it to transform into the Dodo Magia.

Little Assassin is portrayed by Ryunosuke Matsumura (松村 龍之介, Matsumura Ryūnosuke), while his original appearance is portrayed by Kai Yoshida (吉田 快, Yoshida Kai).

Ikazuchi (雷), formerly known as Uchuyaro Raiden (宇宙野郎 雷電, Uchūyarō Raiden, Spaceman Raiden), is an aggressive prototype HumaGear astronaut who worked for Hiden Intelligence as a member of the Zea satellite's maintenance team alongside his "younger brother", Uchuyaro Subaru (宇宙野郎 昴, Uchūyarō Subaru, Spaceman Subaru). In reality, he was unknowingly reprogrammed to become a MetsubouJinrai.net sleeper agent. After having his Ikazuchi programming reawakened permanently, he gained the power become Kamen Rider Ikazuchi (仮面ライダー雷, Kamen Raidā Ikazuchi) by utilizing the Dodo Zetsumerise Key in the Force Riser.

Ikazuchi is portrayed by Daichi Yamaguchi (山口 大地, Yamaguchi Daichi).

Naki (亡), originally credited in the earlier episodes as the "mysterious hooded person" (謎のフードの人物, Nazo no fūdo no jinbutsu), is a prototype HumaGear and a secretive member of MetsubouJinrai.net. After being enslaved by Gai, their original A.I. chip was implanted into Isamu's brain until Jin figured out a way to extract it and give Naki their own body.^{Ep. 32, 34 - 35}

Naki is portrayed by Satsuki Nakayama (中山 咲月, Nakayama Satsuki).

As (アズ, Azu) is a messenger of the Ark with similar appearance to Is.

As is portrayed by Noa Tsurushima, who also portrays Is.

Finis (フィーニス, Fīnisu) is a non-binary Time Jacker and the main antagonist of Kamen Rider Reiwa: The First Generation. They invaded the World of Zero-One to prevent the Daybreak incident via the power of their Another Rider, Another Zero-One, and negate Aruto's history. However, their true plan was to get revenge on Kamen Rider Zi-O for rewriting his world's timeline and defeating their leader Swartz by renewing the latter's plot to destroy the Kamen Rider multiverse.

To achieve their goals, they set out to steal the power of Kamen Rider 1, the progenitor of all Kamen Riders, and become Another 1 (アナザー1号, Anazā Ichigō). After absorbing Geiz Myokoin's Time Mazine, Another 1 evolved into Another New 1 (アナザー新1号, Anazā Shin Ichigō). She was defeated by Kamen Riders Zi-O and Zero-One.

Finis is portrayed by Rina Ikoma (生駒 里奈, Ikoma Rina).[3] As Another 1, they are voiced by Kōji Ishii (石井 康嗣, Ishii Kōji).

Will (ウィル, Wiru) is the HumaGear secretary to Korenosuke Hiden who appears in Kamen Rider Reiwa: The First Generation. As a result of the Time Jackers' machinations, he took over Hiden Intelligence after killing Korenosuke, replaced Aruto as CEO, and led a HumaGear uprising.

After Finis gave him the Zero-One Anotherwatch, Will became Another Zero-One (アナザーゼロワン, Anazā Zero Wan). He was destroyed by Kamen Riders Vulcan and Valkyrie.

Will is portrayed by Sōkō Wada (和田 聰宏, Wada Sōkō).[3][4]