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This is a partial character sheet for Kamen Rider Double. Visit here for the main character index. Subjective trope and audience reactions should go on the YMMV page.

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Characters appearing in Kamen Rider Double: Begins Night

    Asami Mutsuki 

Asami Mutsuki

Portrayed by: Asuka Shibuya

A famous pop singer. She is being haunted by the spirit of her dead sister Erika, and comes to the Narumi Detective Agency for help. Later calls off the case after being lured into a trap by cult leader Father Roberto Shijima.
  • Adult Fear: Her sister died in an accident beyond her control.
    Erika Mutsuki 

Erika Mutsuki

Portrayed by: Miyu Sawai

Asami's sister, who died in a boating accident a year ago.
    Father Roberto Shijima 

Father Roberto Shijima/Death Dopant/Dummy Dopant

Portrayed by: Toru Tezuka

A cult leader who takes care of the local cemetery. He is causing the mysterious resurrections throughout Futo, including those of Erika and Sokichi as the Death Dopant... who he is imitating as the Dummy Dopant.


Characters appearing in Kamen Rider Double Forever: A to Z/The Gaia Memories of Fate



  • Came Back Wrong: Katsumi was Maria's good son, Reika was just an escaping prisoner, Kyosui was a triad member who got betrayed (and without his Camp Gay trait before death), Gozo was a farmer protesting against land development, and Ken was a married SAT member. Subverted by a little that they still retain their kind side even after becoming NEVER , but subsequent events turned them insane (though Reika was still retaining her sanity).
  • Dead All Along: NEVER was a project by the Museum and Foundation X reviving people to use as Super Soldiers.
  • Evil Counterpart: To Double's own Gaia Memories. Although Cyclone isn't evil.
  • Fallen Hero: The group began acting as mercenaries, still holding onto their ideals. One of the effects from the serum that kept them active was the gradual vanishing of their emotions: by the time of A to Z, most -if not all- of them had already fallen to this, even if most of their personality traits were retained. That and their failure to save the Quark project subjects drove them insane.
  • Phlebotinum Rebel: Villainous version. Though originally this wasn't the case.
  • Super Soldier: Were originally intended to be used as this due to their invulnerability.
  • We Have Reserves: when a defeated Reika returns to Eternal, he dismisses her and tells her that he can just make more of them.
    Katsumi Daido/Kamen Rider Eternal 

Katsumi Daido/Kamen Rider Eternal Blue Flare

Portrayed by: Mitsuru Matsuoka (live), Jun Watanabe (suit)
Teen Katsumi Portrayed by: Masaki Suda

Katsumi Daido is the leader of the terrorist organization NEVER, distributing the T2 Gaia Memories which resemble the Kamen Riders' Memories. With the Eternal Memory and a Lost Driver, he transforms into Kamen Rider Eternal.

Voted #2 Kamen Rider in the Kamen Rider W franchise, #13 Kamen Rider in the Heisei era, and #17 Kamen Rider overall in NHK's All Kamen Rider Popularity Vote.

Tropes that apply to him in general

  • Ax-Crazy: Oh boy, is he.
  • Big Bad: Of The Movie.
  • Came Back Wrong: Subverted. According to his mother, before he died, he was actually a good person and loving son, thus why she brought him back to life to begin with. However, the backstory in Kamen Rider W Returns: Kamen Rider Eternal reveals that it wasn't the resurrection that corrupted him; he turned out okay initially. Instead, it was after his encounter with Dr. Prospect that he began to be more unhinged.
  • Card-Carrying Villain: Not afraid of proclaiming himself to be evil.
  • Catchphrase: "Now, Enjoy Your Hell."note 
  • Driven to Madness: Dr. Prospect's coldblooded murder of the Quark Project subjects drove Katsumi insane.
  • Early-Bird Cameo: A rather surprising one: SOPHIA was a guest at Anime Expo 2010 in Los Angeles, and during their last song, Eternal came on stage.
  • Fallen Hero: His failures in W Returns: Kamen Rider Eternal, and the monstrosities he witnessed, were what drove Katsumi to fall.
  • Knife Nut: He carries around a combat knife.
  • Laughing Mad: Happens after he was driven insane by the deaths of the Quark Project subjects.
  • Noble Demon: Sure, Katsumi is a ruthless fighter and killer, but he saved his to-be comrades from death by turning them into Necro-Overs, and also Mina and her Quark's comrades from despair and death, urging them to fight against Foundation X for survival. Even Shotaro and Philip mourned for him after hearing the whole story, saying that he could have become another Kamen Rider protecting Futo had he not experienced those events.
    Katsumi: If the past is going to disappear, then at least let me have a tomorrow. That's why we're still struggling! Now, a dead person like me is still fighting for my tomorrow, how can you explain that!?
  • Roaring Rampage of Revenge: His reason of returning to Futo in The Movie, against both Museum and Foundation X.

Tropes exclusive to him as Kamen Rider Eternal

  • All Your Powers Combined: Eternal can channel a 26-memory Maximum Drive with all of the T2 memories.
  • Badass Cape: The Eternal Robe. From the setting, it can block electric shock, fire, blizzard and physical attacks, making him almost imprevious to most type of damage.
  • Finishing Move: Five of them.
    • Eternal 1: Eternal Requiemnote 
    • Eternal 2: Bloody Hell Bladenote 
    • Unicorn: An unnamed Maximum Drive where Eternal executes a Rider Punch through drill shaped energy.
    • Zone: Another unnamed Maximum Drive that brings all T2 Gaia Memories (within a certain radius) to Eternal, placing each one in a Memory Slot.
    • T2 Gaia Memories: Never Ending Hellnote 
  • Knife Nut: Eternal Edge.
  • Mythology Gag: His design somewhat resembles that of Kiriya's Oni form from Kamen Rider Hibiki, while following the trend of white movie-exclusive Riders like Psyga, Touki & Den-O Wing Form.
  • Palette Swap: Eternal Red Flare from W Returns: Eternal, which is revealed to be the result of using the experimental T1 Eternal Memory. Its resonance with Daido causes it to evolve into Blue Flare before burning out entirely.
    Reika Hanehara 

Reika Hanehara/Heat Dopant

Portrayed by: Minase Yashiro (live), Sanae Hitomi (suit)

Reika is a woman who uses the T2 Heat Memory to control fire. She also has her own motorcycle. Defeated by Kamen Rider Joker's Rider Kick.
  • Berserk Button: She doesn't like it when Shotaro calls her cold.
  • Blood from the Mouth: In her death scene in the Eternal V-Cinema.
  • Breakout Character: Of the NEVER characters, she gets the most attention and screentime in the Eternal V-Cinema of anybody except Katsumi himself. Having the most nuanced personality of the bunch in Forever A to Z probably helped, as did Koichi Sakamoto's tastes in women.
  • Mad Love: Implied towards Katsumi. The movie OST actually has a track named "Twisted Love", which plays when Reika's body disintegrates after Katsumi rejects her as just a tool.
  • Nice Job Fixing It, Villain: Telling Shotaro that Daido is holding Philip captive is a subtle case of this.
  • Masculine Girl, Feminine Boy: Masculine Girl to Kyosui's Feminine Boy.
    Kyosui Izumi 

Kyosui Izumi/Luna Dopant

Portrayed by: Genki Sudo (live), Yugo Fujita (suit)

Kyosui is a man who uses the T2 Luna Memory in order to cast illusions on his body, allowing him to bend. While he manages to best Kamen Riders Double, Accel, and Joker (on separate occasions), he is defeated by Kamen Rider OOO's OOO Bash.
  • Berserk Button: According to him, being called a creepy old guy is a huge insult to a lady.
  • Bodyguard Crush: Fell in love with Katsumi before his first death.
  • Camp Gay: And very open about it, to boot. He even calls himself a "lady".
  • The Cast Show Off: Genki Sudo is both a mixed martial artist and a dancer, so Kyosui spends a lot of time sort of dancing in place just to show off how flexible he is.
  • The Dragon: To Eternal/Katsumi Daido.
  • Manly Gay: Considering the actor normally does MMA...
  • Masculine Girl, Feminine Boy: Feminine Boy to Reika's Masculine Girl.
  • Mook Maker: He is able to spawn T2 Masquerade Dopants.
  • Rock Beats Laser: In W Returns: Eternal he can avoid psychic attacks by shimmying.
    Gozo Domoto 

Gozo Domoto/Metal Dopant

Portrayed by: Koji Nakamura (live), Ryo Yokota (suit)

Gozo is a man who uses the T2 Metal Memory to turn into the Metal Dopant, wielding a rod. Defeated by Kamen Rider Joker's Rider Punch.
  • Shirtless Scene: The Metal Memory goes into his back. W Returns: Eternal plays this one straight.
    Ken Ashihara 

Ken Ashihara/Trigger Dopant

Portrayed by: Ken Ashihara (live), Norihito Ito (suit)

Ken is a man who uses the T2 Trigger Memory to turn into the Trigger Dopant, with a large rifle attached to his arm. Defeated by Kamen Rider Accel Trial.
    Maria S. Cranberry 

Maria S. Cranberry/Maria Daido/Cyclone Dopant

Portrayed by: Aya Sugimoto (live), Satoshi Fujita (suit)

Maria S. Cranberry is an international crime investigator on the trail of NEVER, aiding Shotaro as he combats the organization.
  • The Atoner: She helps the heroes in order to atone for her role in making her son a guinea pig for the NEVER experiment.

Characters appearing in Kamen Rider Skull: Message for Double

    Seiichiro Matsui 

Seiichiro Matsui/Spider Dopant

Portrayed by: Taro Yamamoto

Called Matsu, he is Sokichi Narumi's friend and partner from 1999. He helps Sokichi on his cases by researching in libraries, which causes Akiko to compare him to Philip. However, his jealousy of Sokichi leads him to become the Spider Dopant, eventually kidnapping Melissa with the intent of marrying her. Sokichi as Skull stops him, however, and defeats him with a Rider Kick, at the cost of Matsu's life.

  • Expy: To Philip, minus the magical library.
  • Mythology Gag: As the Spider Dopant, he is a reference to the Spider-Man from the original series. He's even called Kumo Otoko (Spider-Man).
  • No Ontological Inertia: Averted: even after his Memory broke and he died, the spider bombs he planted remained active.


Portrayed by: Hikaru Yamamoto

A famous singer in Futo in the year 1999, and being stalked by the infamous Spider-Man.
  • Shoe Slap: Does this to the Spider-Man/Dopant. With a high-heel shoe.
  • Unholy Matrimony: Spider Dopant attempts to do this with her.
    Eren Komori 

Eren Komori/Bat Dopant

Portrayed by: Reon Kadena

A Museum agent serving as a Gaia Memory dealer in 1999. Fights Sokichi/Skull as the Bat Dopant, and is defeated after Skull uses the Skull Punisher on a fuel truck she was controlling. She begs for the Rider to rescue her, but he ignores her as the truck bursts into flames and explodes.
  • Mythology Gag: Another reference to the original series, where Kamen Rider 1 fought a Bat after the Spider.
  • Punny Name: While 'Komori' is written with different kanji, it's a homophone for the Japanese word meaning 'bat'.
    Kamen Rider Core 

Kamen Rider Core

Portrayed by: Fumihiko Tachiki (voice)

A monster created from the fusion of the Memory Memory and the black Core Medals.

Characters appearing in Kamen Rider W Returns: Kamen Rider Accel

    Aoi Katsuragi 

Aoi Katsuragi

Portrayed by: Yukari Taki

A member of a pickpocketing ring and a thief's daughter; she saw her father killed by a certain cop later revealed to be the Commander Dopant. Thus she treats police officers with apprehension until meeting Ryu Terui/Kamen Rider Accel. Her involvement with Ryu complicates his marriage with Akiko, yet in the end their relationship recovers and Aoi begins to reform.
  • Just Like Robin Hood: Subverted in that she only really turns good after vowing to leave her life of crime.
    Hiroshi Sagami 

Hiroshi Sagami/Commander Dopant

Portrayed by: Minoru Tanaka

An officer within the Futo police who saw his wife killed in front of him. Thus he became the Commander Dopant, vowing to eradicate crime in the city regardless of life or cost. He eventually acquires the Gaia Memory Enhancing Adapter, increasing his power, and later abducting Akiko to attempt to convince Ryu to follow his path. Ryu decides not to, however, and defeats Sagami as Accel Booster.

Characters appearing in Kamen Rider W Returns: Kamen Rider Eternal



Portrayed by: Rin Takanashi

A mysterious psychic who confronts Shotaro and Philip, and tells them the story of Katsumi Daido, Kamen Rider Eternal.
  • Mind over Matter: While Mina can use all of the various types of Quark powers, telekinesis is her general favorite.
  • Superpower Lottery: Of the various Quarks, she's noted to be far and away both the most powerful and the most versatile, manifesting all of the various abilities the psychic soldiers can achieve instead of just one. She's so powerful, in fact, that even the Eyes Dopant's brand doesn't kill her.
    Doctor Prospect 

Doctor Prospect/Eyes Dopant

Portrayed by: Jyunichi Haruta

A doctor sponsored by Foundation X and leader of the Quark project, designed to augment humans with Psychic Powers.
  • Big Bad: Of W Returns: Eternal.
  • The Dreaded: The Quarks, people with amazing Psychic Powers, are absolutely terrified of him. And with good reason!
  • Morally Ambiguous Doctorate: He's a very intelligent man, but he's also a complete maniac with no regard for human life.
  • Sinister Surveillance: One of his powers as the Eyes Dopant is to implant Quarks with an "eye" that allows him to watch their every move. Said eyes also can be used to kill their bearers in case of escape.
  • Super Senses: Of the sight variety.
  • Weaksauce Weakness: His creepy floating eyes can also be used to predict his opponents moves in a fight, but Katsumi gets around this by using his Eternal cape to hide his attacks from his sight. Even before that, Kamen Rider Eternal did considerably better against him, likely due to him previously using muscle movements and facial expressions to predict his movements, which he couldn't see inside the suit.