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    Akihito Narihisago/Sakaido 

Akihito Narihisago

Voiced by: Kenjiro Tsuda (Japanese), Josh Grelle (English)

A renowned detective assisting in investigating and analyzing serial killer ID-Wells. His real name is Akihito Narihisago, but during his time in ID-Wells he is referred to as the brilliant detective Sakaido. In the past he was once a happy family man with a daughter named Muku. Two years prior to the current events Muku was murdered by a serial killer nicknamed the Challenger, followed by Narihisago's wife committing suicide out of grief, leading Narihisago to kill the Challenger out of revenge. He is also the main protagonist of the series.

  • Adaptation Dye-Job: In the anime, he has green eyes, but in #BRAKE BROKEN manga, he has blue eyes.
  • Affectionate Nickname: He is called by "Aki" by his wife, Ayako.
  • Anti-Hero: He is of the Unscrupulous Hero type. He's a good guy at heart, but because of his tragic past, he's completely fine with being absolutely merciless to criminals. It's his deep connections with his family and friends that keep him from going outright insane.
  • Badass Baritone: He sounds very deep and gruff thanks to the acting provided by both of his actors in Japanese and English.
  • Badass Normal: Narihisago didn't need any special martial arts skills during his fight with the The Challenger in the ID Well. All he needed to do was cheat to win.
  • Berserk Button:
    • Never hurt anyone innocent or else Narihisago will show all the criminals responsible why he is the most feared detective out there.
    • In #BRAKE BROKEN, After Narihisago rejects his wife’s ID well as Sakaido, his expression darkens and he intends to kill those responsible for leaving wakumushbi in the serial killer’s hands, break into his old home, and scan his wife’s cognition particles where she committed suicide. It is clear he doesn’t want to remember his regret over not stopping his wife’s suicide after their daughter’s death.
  • Break Them by Talking: Narihisago does this to The Pyrotechnician in episode 3. It's later said that it's not the first time and that it's actually a specialty that he's mastered. It drives The Pyrotechnician and other criminals to suicide. The colleagues that he works with are wary of this, since even behind bars, Narihisago is still killing others, even if they are unrepentant killers.
  • Combat Pragmatist: He used a gun against the Challenger, who was expecting a fists-only fight.
  • Dark and Troubled Past: Muku, his only daughter was brutally beaten to death by the serial killer Challenger, and his wife committed suicide right in front of him after said incident. Avenging his daughter is what landed him in prison. His dark past haunts him even now, and it is not until Episode 10 that he finally accepts their deaths and moves on.
  • Despair Event Horizon: Muku's gruesome death was bad enough, but Ayako's suicide was what finally pushed him over the edge.
  • Exhausted Eye Bags: In the manga, he has bags under his eyes due to lack of sleep.
  • Fire-Forged Friendship: Narihisago and Hondomachi become good friends and partners at the end of the series.
  • The Friend Nobody Likes: Downplayed. Aside from Matsuoka, who’s also the only one in the series shown to truly hate him, and Momoki, as well as Hondomachi later on, both of whom still treat him with respect, the rest of Kura are at best neutral towards him for his murder of The Challenger.
  • Friend or Idol Decision: In episode 10, he has two choices to choose from: Find the true identity of John Walker with Hondomachi in Kiki's ID well or stay in Kiki's ID well where his wife and daughter are alive. He chose the former.
  • Friend to All Children: Being a father himself, Narihisago is very kind and understanding towards younger characters.
  • Good Old Fisticuffs: He knows some street brawling, which he uses against The Challenger while fighting him in Kiki's ID Well.
  • Happily Married: He was married to his wife Ayako and they had a daughter named Muku. Episode 10 shows that before Muku's death, he was practically the happiest man alive. Muku's death ended up destroying his marriage slowly when Ayako blamed him for their daughter's demise, with the marriage ending quite shockingly when Ayako committed suicide.
  • Hidden Heart of Gold: Underneath his cynical exterior, deep down, he is a laid-back and understanding individual who values the safety of the innocent and fights for what's right. He shows the qualities of a Humble Hero.
  • I Reject Your Reality: After Narihisago spent two years in Kiki's ID well, he believes the events in the real world was a dream and Kiki's ID well is reality. When Hondomachi appears and tries to talk senses to him, he refuses to believe her. However, after she fully explained everything to him, he came back to his senses.
  • Made of Iron: He managed to defeat The Challenger in the ID Well with a broken arm and injured face. He also survives a wound inflicted by Hayaseura when he was exposed.
  • Outliving One's Offspring: His daughter, Muku was murdered by The Challenger three years ago.
  • Papa Wolf: He'll do anything for his wife and daughter. This also extends to younger characters and innocent people too.
  • Pay Evil unto Evil: He isn't afraid of doing this to criminals. Just ask The Pyrotechnician, The Challenger, and The Facelifter.
  • Perma-Stubble: He has a slight stubble on his chin.
  • Pistol-Whipping: He proceeds to give pretty big smashes to The Challenger's face with the bottom of his weapon in their ID Well fight.
  • Precision F-Strike: In Episode 9, he says this to past version of The Challenger before they fight to the death in Kiki's ID Well.
    Narihisago: "You're a fucking pervert who got off beating a 14-year-old girl to death."
  • Roaring Rampage of Revenge: He brutally murdered The Challenger for killing his daughter. He gets a second chance to exact his revenge on The Challenger by fighting him face to face in Kiki's ID Well. And he won, while enjoying every second of the fight. He also gets his revenge on Hayaseura for staging the events of the story by sealing away his consciousness Uraido in his own ID Well Dogma.
  • Serial-Killer Killer: When Narihisago was in Kiki's well, he continued to kill the other serial killers with induced suicide even after he took his revenge against the Challenger.
  • Tragic Keepsake: He has entire family photos of his wife and daughter as the memories of them in his cell.
  • Uncertain Doom: After Hayaseura shot him in the stomach, it is unknown if his body will survive once he stop Hayaseura. In the series finale, he survived from his wounds and got treatment.
  • Use Your Head: When he's fighting The Challenger in Kiki's ID Well, he gives The Challenger a good smash in the face with his head since his right arm was broken.


Voiced by: Kenjiro Tsuda (Japanese), Josh Grelle (English)
A persona adopted by Akihito Narihisago whenever he enters id wells. The original "brilliant detective", he traverses the id wells of serial killers in an endless loop to try to uncover the truth behind the murder of Kaeru, and indirectly determine the identity of the id well's owner for Kura.
  • Badass Longcoat: In an interview, Sakaido's long coat and blazer is symbolizes the desert in Narihisago's ID Well.
  • Digital Avatar: His appearance is based on Narihisago in his prime when he used to be a working detective.
  • Floating Limbs: He started out with his body on a bed with parts floating in space while inside Fukuda's ID Well, but this proved to be helpful when he needed to reach for platforms to connect together to give him clues to Fukuda's location. This ability is only exclusive to Fukuda's case as he is seen complete and whole in later cases. It does come back because the heroes tricked Uraido/John Walker into entering inside Fukuda's Well, where Sakaido uses his floating left hand to stop Uraido/John Walker from escaping.
  • I'm Crying, but I Don't Know Why: After Anaido ejected Sakaido from Kiki's Id Well, he cries a single tear from his left eye, but he doesn't know why. This is the result of Narihisago letting go his wife and daughter and moving on with his life without them.
  • Impossibly Cool Clothes: Played with. The opening scene of the series (and the promotional art) makes it look like the series is going for this, based on the first we see of Narihisago and his outfit. It turns out the trope only applies to detectives' appearances in the Well. Outside, clothes are fairly standard. That said, You Gotta Have Blue Hair still applies, even outside the Mental World.
  • Last-Name Basis: He is only referred to by his last name because he can't remember his full name.
  • Non-Action Guy: According to him, he's not a fighter, but he will try as the last result when he was seen fighting John Walker in episode 2. And he uses his Good Old Fisticuff skills in an attempt to defeat Uraido/John Walker in the final episode.
  • Scarf of Asskicking: Along with his shoes, his long flowy scarf symbolises the thunderbolts in Narihisago's ID Well.

    Koharu Hondomachi/Miyo Hijiriido 

Koharu Hondomachi

Voiced by: Mao Ichimichi (Japanese), Monica Rial (English)

She is one of the main protagonists of the series. She assists Kokuryu Matsuoka in tracking down serial killers in the field. After multiple incidents involving Tamotsu Fukuda and Haruka Kazuta, she is recruited as a Mizuhanome pilot, assuming the guise of Miyo Hijiriido inside the id wells.

  • Beware the Nice Ones / Deadpan Snarker: With the emphasis on dead. In order to flush out The Gravedigger, who she guesses is hiding in Inami’s apartment, she loudly threatens to kill Inami. He rushes her and she stabs him to death in self defense. This causes Inami to drop her Emotionless Girl act. Koharu dryly comments that she did have feelings after all.
  • Boyish Short Hair: She has boyishly short black hair.
  • Deliberate Injury Gambit: When held captive by the Perforator she throws herself onto his drill reasoning that the intense emotion of attempting to kill herself would allow the squad to locate her. This works.
  • Disappeared Dad: She never mentioned her father when she was recovering from the hospital. It implies her father abandon her before or after she was born.
  • Fire-Forged Friendship: Hondomachi and Narihisago become good friends and partners at the end of the series.
  • He Is Not My Boyfriend: After Fukuda's death, Inami says they are even because Hondomachi killed her man (Kazuta), but Hondomachi denies it.
  • Hero-Worshipper: Hondoumachi really respects Narihisago as the Brilliant Detective and aspires to be like him someday.
  • Killing in Self-Defense: She murders Kazuta in self-defense when he's trying to kill her.
  • Luminescent Blush: She blushed after being kissed by Kazuta for the first time when Matsuoka asks her why she's fluttering.
  • Mistaken for Gay: When she has a conversation with Inami about Kazuta, Inami thought she might have a romantic interest in her, which Hondomachi awkwardly denied as a misunderstanding.
  • Mortality Phobia: After Honomachi experiences her first death as Hijirido, she becomes scared of dying and refuses to go back to the Mizuhanome cockpit. She still hesitates to dive back in an ID well after her chat with Narihisago.
  • Older Than They Look: She is actually 23, but her small size and young looks make Matsuoka believe that she could easily pass off as a middle schooler.
  • Platonic Life-Partners: With Matsuoka. She doesn't have romantic feeling for him and she only sees him as her superior and ally.
  • Parental Neglect: It's implied that Hondoumachi's relationship with her mother isn't great since she didn't visit her in the hospital after she was almost killed by Fukuda. However, she wasn't mad or sad about her mother's absence.
  • Precision F-Strike: She rarely curses, but the only time she does when she calls Kazuta an asshole who was trying to murder her.
    Hondomachi: "There was no reason for Haruka Kazuta to kiss me. The urges to kill and to kiss have been interchanged in his unconscious. Hey! That means that asshole was trying to kill me!"
  • Proper Tights with a Skirt: She wears tights as part of her work clothing.
  • Sacred First Kiss: She wasn't happy to had her first kiss stolen by a serial killer, Haruka Kazuta.
  • Scars Are Forever: Hondoumachi has a scar on her forehead because of Fukuda and although she recovered at the hospital, blood still tends to leak from her scar on occasion.
  • Ship Tease: With Fukuda, although she only viewed him as a valuable ally.
  • Single Tear: She lets one tear run when she is mourning for Fukuda. She claims that she won't let anymore tears run as a sign of respect for him.
  • Spell My Name with an "S": Hondomachi/Hondoumachi.

Miyo Hijiriido

Voiced by: Mao Ichimichi (Japanese), Monica Rial (English)

A persona adopted by Koharu Hondomachi whenever she enters id wells. She is the third "brilliant detective", after Sakaido and Anaido, and like them, she traverses the id wells of serial killers in an attempt to solve Kaeru's death and indirectly determine the identity of the id well's owner.

  • Badass Adorable: While wearing a cute looking detective outfit, she easily figures out a way to avoid the thunderstorm in Narihisago's ID Well.
  • Bare Your Midriff: Her stomach is exposed underneath her detective coat because she's wearing a short tank top.
  • Brutal Honesty: When talking to Muku and Ayako in Narihisago's ID Well, she makes it very clear that she's only there to solve the mystery and nothing else. But, when Muku tells her that she can save the people under the thunderstorm, Hijirido happily agrees with her decision and encourages her to do so.
  • Digital Avatar: Her appearance is relatively the same as Hondomachi, but she doesn't have the scar on her forehead and has a completely different outfit. However, in Episode 11, when Anaido told her who is she, her scar reappear.
  • Distinguished Gentleman's Pipe: Official concept art has shown her with a pipe to fit together with her detective-themed outfit.
  • Last-Name Basis: She is only referred to by her last name instead of her first name.
  • Meaningful Name: Hijiriido means 'Holy Well'.
  • Sherlock Homage: Her Well outfit is modeled after Sherlock's iconic hat and coat.
  • The Smurfette Principle: She's the only female Brilliant Detective in the group.
  • Odd Name Out: While her surname still ends with "ido" like the two prior "brilliant detectives", unlike them she has a given name that she remembers which the Mizuhanome crew comment on.
  • Who Wears Short Shorts?: She is actually wearing shorts underneath her detective coat.

    Tamotsu Fukuda/Anaido 

Tamotsu Fukuda

Voiced by: Ryota Takeuchi (Japanese), Justin Cook (English)

A prolific, mentally disturbed serial killer known as "The Perforator", he murdered his victims by drilling holes in their heads, under the belief that he is helping them achieve a new, better state of mind.

After his capture by Kura, he was recruited as a Mizuhanome pilot, assuming the guise of Anaido when inside the id wells, taking on the role of a protagonist.

  • Bungled Suicide: In the past, he tries to kill himself by drilling a hole in his head, but failed.
  • Chekhov's Gun: In the series' finale, Fukuda's ID Well played a key role in stopping John Walker/Uraido once and for all.
  • Cursed with Awesome: His crippling arithmomania coupled with great memorization skills can be considered as this. Without it, they wouldn't have been able to find Hijiriido's and Kiki's location in Narihisago's well. As well as discovering John Walker's true identity.
  • Death Seeker: It is revealed that the reason why he purposely trapped Narihisago within his ID well is because he wants to die.
    • In Kiki's well, when Fukuda doesn't meet and kidnap Hondomachi he tries to drill himself again, only to be stopped by Hondomachi.
  • Didn't See That Coming: He wasn't expecting Hondomachi to drill a hole in her own head in order to create her ID well so the members of Kura could find her.
  • Enemy Mine: After his arrest, he's recruited as a Mizuhanome pilot because of his potential at being a Brilliant Detective, which will come in handy for solving the cases involving John Walker.
  • Even Evil Has Standards: In Kiki's ID well, when mentions to Hondomachi about how John Walker tells him to drill a hole in Kiki's head in his dream, but he refuses to kill Kiki because he's not interest in "dream holes". When John Walker asks him again, he still refuses.
  • Friendly Enemy: After the arrest of Fukuda the Preforator, he decides to spend his days in jail talking to Narihisago for company, at some points, even teasingly calling him "sempai" and "partner". And despite the trouble he caused in the beginning, he's on friendly terms with Hondomachi, which even extends to him jumping in front of Hondomachi to save her from Inami.
  • Go Out with a Smile: He died smiling after he sacrificed his life to save Hondomachi.
  • Heroic Sacrifice: He sacrificed his life to save Hondomachi from Inami.
  • Intelligence Equals Isolation: He's an undeniably smart person but he's lived alone without family or friends for years.
  • Lobotomy: How the Perforator kills his victims. He also did it to himself first.
  • Naked on Arrival: Subverted. As a distorted version of him in his own ID well he is completely nude, but he's missing several parts of his body that doesn't show his chest and private parts.
  • Room Full of Crazy: One of his rooms has random sequences of numbers written all over it.
    • In a later episode, it was revealed that it was one of the symptoms of his arithmomania before he drilled himself.
  • Scars Are Forever: Fukuda has a nasty scar on the right side of his face along with the hole on his forehead that he drilled into himself.
  • Self-Harm: Fukuda drilled a hole through his own skull. And survived. It was motivated by his arithmomania, which it managed to cure.
  • Ship Tease: With Hondomachi. He has some moments with her in the penultimate episodes. He saves her from falling from her own ID well and willing to sacrifice his own life to save Hondomachi from Inami. But, Hondomachi doesn't have romantic feelings for Fukuda and views him as more of a valuable ally.
  • Super OCD: It is later revealed that Fukuda has an obsession with numbers, specifically the number 3. His unhealthy obsession with numbers is what drove him to drill a hole in his brain. This managed to quell his OCD, but it fully returns when he enters into the ID Well. His numerical OCD returning was actually a key factor in finding out the identity of John Walker because he remembered the dates that he encountered him, allowing Hondomachi and Narihisago to deduct his identity.
  • This Is a Drill: The Perforator uses a powered hand drill to drill holes through the heads of his victims.
  • Two-Faced: He has a hideously disfigured or scarred right side of his face with his right eye still intact.
  • Uncertain Doom: After he sacrificed his life to save Hondomachi, it is unknown if Fukuda will be revived or stay dead once Kiki is put back in the Mizuhanome or killed by Momoki. In the series finale, it's been confirmed he is still comatose in the real world as a result of his consciousness being killed inside an ID well. It is currently unknown how long he will stay comatose.


Voiced by: Ryota Takeuchi (Japanese), Justin Cook (English)

A persona adopted by Tamotsu Fukuda whenever he enters an id well. He is the second "brilliant detective", who, like Sakaido before him, traverses the id wells of serial killers in an attempt to solve Kaeru's death and indirectly determine the identity of the id well's owner.

  • Cloudcuckoolander: As a Brilliant Detective, he becomes very hammy and likes to do funny Finger Gun poses and occasionally speak with Gratuitous English. Although, silliness aside, he does become quite competent as a detective when working together with Narihisago.
  • Digital Avatar: He looks like a younger version of Fukuda, but without his scars and the hole in his head. However, even though he retain his memories as Fukuda, his appearance doesn't change.
  • Epic Fail: His first attempt at piloting in The Pyrotechnician's ID Well ends up in failure because he didn't know what to do. But it's later revealed that he failed on purpose and was well aware of what he was "supposed" to do.
  • Faking Amnesia: After he ejected Sakaido from Kiki's ID well, it is revealed Anaido retains all of his memories as Fukuda.
  • I'm a Humanitarian: In episode 8, he suggests eating Kaeru's corpse for survival, but Sakaido refused.
  • Last-Name Basis: He is only refers by his last name because he can't remember his full name.
  • Meaningful Name: Anaido is comprised of characters meaning "hole" and then "well" (for water, pronounced ido).
  • Nice Job Breaking It, Hero: Not only he told Sakaido who he was in the real world with his memories intact as Fukuda, but now he and Anaido are trapped in a dogma, the end stage of Narihisago's ID well.
    • Nice Job Fixing It, Villain: This hides them from outside observation, making quantum time stretch to occur allowing them all to solve the case and get out safely.
  • Obfuscating Stupidity: "Anaido"'s entire personality is indicated to be a case of this, since unlike the other personas, he remembers everything Fukuda knows about the outside world.
  • Primary-Color Champion: Anaido has blue trenchcoat (with red ascents) and red boots. Contrast to the other two detectives that wears earth tone outfits.
  • Put on a Bus: With Fukuda is rendered comatose, he is presumably no longer usable.
  • Shirtless Scene: He has a brief one when he has to take off his clothes and urine them in order to prevent heatstroke and dehydration in Momoki's ID well.

    Hunetaro Momoki 

Hunetaro Momoki

Voiced by: Yoshimasa Hosoya (Japanese), Christopher Wehkamp (English)

Head inspector of the investigation unit, and a good friend of Narihisago. He worked with Narihisago as a police officer prior to Narihisago's imprisonment. While he trusts in Sakaido's detective skills, he worries for Narihisago's mental health. He rescued the last victim in the Challenger case, Kiki Asukai, but is puzzled by her disappearance and has secretly tried to investigate her disappearance.

  • Big Damn Heroes: Momoki and Matsuoka arrive just outside of the Kura and Momoki volunteers to enter the building with a prototype Mizuhanome helmet and suit to stop Kiki's powers and to save everyone inside. He's successful in reasoning with Kiki and is working on a way to free her from her psychic powers.
  • Big "WHAT?!": Momoki's reaction in shock and confusion when Narihisago told him the location and true identity of The Challenger in Kiki's ID well.
  • Clear My Name: Someone framed him for being John Walker by planting the dead skeleton of Nishio Shirakoma in Momoki's house.
  • Curtains Match the Window: His hair and eyes are dark grey.
  • Determinator: Not even broken ribs from defibrillators or nausea from psychic powers will stop Momoki from reaching out for Kiki's sake.
  • Magical Defibrillator: Momoki's suit has built-in defibrillators that are activated by Matsuoka to revive him from fainting. It ended up breaking his ribs, but he managed to continue forth.
  • Nice Guy: He's a noble gentleman who looks out for the safety of Narihisago. He even successfully reasons with Kiki Asukai to not commit suicide and promised that he will free her from the Mizuhanome system.
  • Only Friend: He is the only friend of Narihisago, since without him, Narihisago wouldn't be able to retain his sanity.
  • Power Nullifier: The prototype Mizuhanome helmet and suit that Momoki equips is able to ward off most of the psychic powers in the building, although he struggles to enter the building because the powers are still too strong for the helmet and suit to handle. It was his revival by the suit's built-in defibrillators that allowed him to continue forth.
  • Ship Tease: He has some with Kiki and Togo.
  • Stress Vomit: He vomits in his helmet due to the psychic powers making him nauseous.
  • Trying Not to Cry: He's holding back tears as he comforts and assures to Kiki that he and the Kura will continue to work on finding a way to free her.
  • Would Hit a Girl: In the after-credit of Episode 12, when Matsuka asks him if Kiki refuses to be put back in Mizuhanome, he says his comrades comes first and he will do everything to save them. It implies he won't hesitate to kill Kiki if she refuses. Subverted in the series finale, he never load bullets in his gun and has no intention to kill her.

    Kokuryu Matsuoka 

Kokuryu Matsuoka

Voiced by: Rintaro Nishi (Japanese), Jarrod Greene (English)

He's an ex-colleague of Akihito Narihisago and senior colleague of Hondomachi.

  • A Father to His Men: Matsuoka very much cares for the safety of his men while doing investigations and is even willing to send Hondoumachi to the special division just to make sure that they stay safe during their investigations.
  • Big Damn Heroes: He assists Momoki in stopping Kiki from losing control of her powers. When Momoki loses consciousness, he signals to the communication team to use a built-in defibrillator to revive Momoki.
  • Good Scars, Evil Scars: He has a clean scar above his left eyebrow, reflecting his tough line of work and steadfast personality.
  • Mission Control: He and a communication team of technicians work with Momoki through radio to guide him towards Kiki's location in the Kura building.
  • Platonic Life-Partners: With Hondoumachi. He doesn't have romantic feelings for her and he only sees her as ally.
  • So Proud of You: He initially feared that Hondomachi would end up a criminal like Narihisago, but after she helped save the members of the Kura, he lets go of his doubts and agrees that she would make a great detective after all.
  • Stoic Spectacles: He can appear cold and tough and is always seen wearing his glasses.
  • We Used to Be Friends: He was a colleague of Narihisago a few years ago, but decided to end their friendship when Narihisago became a criminal.



    Tropes Associated with Wellside 
  • Color-Coded Characters: Each members wears a specific colors.
    • Hunetaro Momoki: Dark Purple
    • Sarina Togo: Purple
    • Shirou Kokufu: Dark Gray
    • Kazuo Wakashika: Gold
    • Masamune Habutae: Red
    • Sennosuke Shiratake: Blue
  • True Companions: The Wellside get along and trust each other greatly. They work together in unnamed ID well to survive in Episode 12 and 13.

    Wellside Staff 

Shirou Kokufu

Voiced by: Wataru Kato (Japanese), Travis Mullenix (English)

He was an assistant to Inspector Momoki.
  • The Baby of the Bunch: Kokufu's age hasn't been reveal yet, but he seems to be the youngest member of the Wellside or similar age to Hondomachi due to their youthful appearances.
  • Undying Loyalty: To Momoki and Toga. He greatly respect and trust them deeply.
  • You Are in Command Now: In the series finale, he becomes the new chief of Kura. Unlike Hayaseura, he is willing to helps out Wellside find serial killers in their investigations in #BRAKE BROKEN.

Kazuo Wakashika

Voiced by: Jun'ya Enoki (Japanese), Kyle Phillips (English)

He is an important member of Inspector Momoki's team who makes deductions about crime scenes as they are being investigated in the id well.

  • Great Detective: Alongside with a Brilliant Detective, Wakashika tries to interpret, deduct, and solve the mysteries of an id well.
  • Mouthful of Pi: In Thunderbolted, he recites an overly long pi sequence that is based on the numbers of Narihisago's id well.

Masamune Habutae

Voiced by: Shuhei Iwase (Japanese), Stephen Fu (English)

He is a member of Inspector Momoki's team who analyses people who appear id wells.

Sennosuke Shiratake

Voiced by: Takashi Kondo (Japanese), Joe Cucinotti (English)

He is a member of Momoki's team who digitally analyzes crime scenes.

    Sarina Togo 

Sarina Togo

Voiced by: Sarah Emi Bridcutt (Japanese), Kimberly Grace (English)

Assistant director to Momoki, and general analyst for the investigation team. She also leads the investigation team when Momoki is unavailable.

  • Beauty Mark: She has one below her left eye.
  • Implied Love Interest: To Momoki. Confirmed in episode 11 when she implicitly reveals they're sleeping together to the rest of the Wellside team when commenting that the picture with cognition particles planted in Momoki's bedroom wasn't there when she last visited.
  • The Smurfette Principle: She is the only female member of Wellside.
  • You Are in Command Now: After Momoki's arrested, she becomes the new director of Kura. In the series finale, she returns to her original position after the John Walker case is over.

    Tsukimaru Nishimura 

Tsukimaru Nishimura

Voiced by: Fukushi Ochiai (Japanese), Daman Mills (English)

He was a field investigator in the service of Kura.

  • Killed Off for Real: He was the first member of Kura to be killed after he died in the explosion during the Gravedigger case.



He is new member of Kura after the John Walker case.

  • Canon Foreigner: He makes his first appearance in #BRAKE BROKEN manga and appears in the series finale as Matsuoka's new partner.
  • Eyes Always Shut: He never open his eyes even he's in the danger situation searching for serial killer cases. The only time he open his eyes when Narihisago almost kill him for losing his wakumusubi in the real S.
  • Last-Name Basis: He is only referred to by his last name and it is unknown what his first name is.
  • Non-Action Guy: He's doesn't like fighting and violence. When Hondomachi gives him a gun for protection, he gently refuses her offer. However, Fukusen is not afraid to defend himself from Narihisago who trying to kill him for losing his Wakumusubi in serial killer’s hands.
  • Sir Swears-a-Lot: Despite being a new member, he swears a lot when he's under stress.

Support Characters

    Kiki Asukai (UNMARKED SPOILERS) 

Kiki Asukai

Voiced by: Yume Miyamoto (Japanese), Sarah Wiedenheft (English)

She was the last victim of the "Challenger", rescued by Hunetaro Momoki before she could be killed and is currently missing.

  • Ambiguous Situation: It is unknown if she is still alive since it's been three years since her disappearance. She talked to Narihisago in both her ID well and in her "dreams" inside of said id well, and seems to imply she's either in a coma and kept alive by an unknown serial killer they kidnapped or she's simply a copy of the real Kiki.
    • In Episode 11, it been confirmed Kiki has been kept in comatose state by John Walker, a.k.a Takuhiko Hayaseura within Kura base for three years.
  • And I Must Scream: She is tortured and experiences horrible deaths at the hands of serial killers every night in her dreams. As a result, it makes Kiki desire a permanent death so she doesn't have to keep suffering anymore.
  • Beauty Is Never Tarnished: Subverted and straight.
    • In her own Id well, she is cover in blood and bruises from The Challenger.
    • After three years has passed, she looks exactly the same after being held captive by John Walker.
  • Brainwashed and Crazy: Hayaseura has been tormenting Kiki in the Mizuhanome to make her under his control. Even after Hayaseura commit suicide, Kiki is still currently unable to gain control of herself and her powers. It turns out that she was not entirely brainwashed, but her powers were starting to grow out of her own control.
  • Bungled Suicide: She tried to commit suicide when she was 18, but failed. She tried again with Momoki's weapon, but he already had it unloaded so that she doesn't hurt herself.
  • Damsel in Distress: Kiki is still very much alive and in great need of help inside of the Mizuhanome itself. At the end, she has to enter inside of the system again to control her powers, but Momoki assures her that they will work to free her soon.
  • Death Seeker: Before she went missing three years ago she tried to commit suicide four times and had to be hospitalized. She still desire to someone to kill her after being killed every night from serial killers sent by John Walker. In her own ID well, even though Narihisago had most of killers commit suicide to make her life less unbearable, she still wants to die.
  • Emotionless Girl: Her traumatic experiences have left her as somber, but she isn't completely devoid of emotion as she is able to feel joy and gratitude, like when she meets Momoki again and was happy to see him.
  • Friendless Background: She has no friends neither from growing up or her early childhood. But, she now acknowledges Narihisago/Sakaido and Momoki as her true friends by the end of the series.
  • I Cannot Self-Terminate: In her own ID well, Kiki begs Narihisago to kill her a while he still has a chance, but he refuses to kill her. Instead, he decides not to visit her again.
  • Identical Stranger: She bears a strong resemblance to Kaeru.
  • Locked Out of the Loop: She is unaware of ID wells, the Mizuhanome System and the current year. It could be a case of her being trapped in her own ID well for three years.
  • Nice Girl: Kiki is actually a very kind person and she regrets that her psychic powers are out of her control.
  • Power Incontinence: Kiki cannot control her own psychic powers and the tormenting that Hayaseura had done to her ended up making her powers being able to affect the entire world, which is something that she doesn't want to happen.
  • Psychic Powers: She has a powerful psychic ability to put people into a comatose state and trap their conscious in a Id well. She is also responsible for putting thirteen nurses in a coma three years ago, though it wasn't out of her own will.
  • Rapunzel Hair: She has the same length black hair as Kaeru. In the present time, where she is held captive, she retains the same length from before.
  • Sealed Good in a Can: She decides to be put back in the Mizuhanome system and she will wait for someone to save her and release her suffering someday.
  • Sensual Spandex: As part of Mizuhanome system, she wears a pure white spandex that exposes her hips, shoulders, hands, and feet.
  • Shared Dream: She has an ability to share the same dreams with serial killers who hunt her every night.
  • Talking in Your Dreams: She can talk to people who enter her dreams, which is how she first got in contact with Narihisago.
  • Trauma Button: When Narihisago mentions how serial killers kept killing her every night in her dreams, she panics and yells at him to stop.
  • When She Smiles: When Kiki does smile, it's very heartwarming and genuine.

Past Characters

    Ayako Narihisago 

Ayako Narihisago

Voiced by: Aya Endo (Japanese), Alex Moore (English)

She was the wife of Akihito Narihisago and had a daughter named Muku.

  • Bath Suicide: She committed suicide by slitting her arm and bled to death in a full bathtub, right in front of her husband.
  • Broken Bird: She didn't take her daughter's tragic death very well. In Narihisago's flashback, after they attend their daughter's funeral, judging by Ayako hitting her husband and refusing to eat, it seems she blamed him for not saving their daughter from The Challenger. She doesn't give him a second chance to repair their marriage before she committed suicide.
  • Driven to Suicide: She didn't take her daughter's death very well. As a result, she killed herself when the reality of a world without her daughter became too much for her to bear. In Episode 9, it's shown how she really died by Bath Suicide. In Episode 10, it's hinted that she not only did this because of her depression but also to possibly spite her husband, since she blamed him for Muku's death and refused to forgive him.
  • Happily Married: She was married to her husband, Akihito, and they had a daughter named Muku. Episode 10 shows that their marriage fell apart after Muku's death but before that, she was practically the happiest woman on earth due to her relationship with Narihisago.
  • Motherly Side Plait: She wore a loose ponytail over her left shoulder, fitting her role as a good mother to Muku.
  • Posthumous Character: She died three years ago before the start of the series.

    Muku Narihisago 

Muku Narihisago

Voiced by: Miyuri Shimabukuro (Japanese), Tia Ballard (English)

She was the daughter of Ayako and Akihito Narihisago.

  • Cruel and Unusual Death: Beaten to death by The Challenger and the wounds/bruises were so bad that she was barely recognizable during her autopsy.
  • Death of a Child: She was killed by The Challenger when she was only 14 years old.
  • Not Allowed to Grow Up: After two years has passed in Kiki's Id well, it doesn't show what Muku looks like in 2018. It implies she hasn't changed a bit and looks exactly the same because Akihito wouldn't have known what sort of woman his daughter could have grown into.
  • Not a Morning Person: She doesn't like waking up in the morning and prefers to sleep a bit longer.
  • Posthumous Character: She was brutally murdered by the Challenger three years ago before the start of the series.
  • Strong Family Resemblance: She looks a lot like her mother except with dark blue eyes.
  • Too Good for This Sinful Earth: One of the sweetest kids you'll ever meet. She just had to run into The Challenger...

    Nishio Shirakoma 

Voiced by: Nobuo Tobita

The inventor of Mizuhanome System. During Narihisago's time in Kiki's id well, it is shown that Nishio was a doctor and independent researcher at Kiki's hospital, and used her as a test subject to study how to enter one's unconscious via dreams. It is implied that Nishio and John Walker kidnapped Kiki to create the Kura Well and Mizuhanome systems. During the search for John Walker, Nishio's corpse is found buried in Momoki's yard, most likely murdered by John Walker in an attempt to cover up any leads to him.



Voiced by: Yume Miyamoto (Japanese), Sarah Wiedenheft (English)

She appears as a corpse in the id wells that the Mizuhanome System creates, her existence prompting the brilliant detectives to solve the identity and motives behind serial killers on Kura's behalf.

  • Dies Wide Open: She always died with her eyes open in every ID wells.
  • Does Not Like Shoes: She's never seen wearing any footwear in ID wells, with any shoes present shown to have been removed before her death.
  • Identical Stranger: She bears a strong resemblance to Kiki Asukai. The reason why she looks like her because Kaeru is Kiki Asukai.
  • Meaningful Name: The name could mean "to return", if given the right kanji. Kaeru does return...a lot.
  • Replacement Goldfish: Averted. According to Narihisago, he thinks of Kaeru as the replacement of his deceased daughter. However, in Episode 3, when he has a dream of Kaeru turning into Muku, he changes his mind and admits that Kaeru will never be his Muku.
  • They Killed Kenny Again: She gets killed in the most gruesome or tragic deaths in every ID well.

Serial Killers

    John Walker (UNMARKED SPOILERS) 

Takuhiko Hayaseura

Voiced by: Manabu Muraji (Japanese), Charles C. Campbell (English)

The leader of Kura. He is also known as John Walker, the creator of serial killers.

  • Apologetic Attacker: After he shot Narihisago in the stomach, he apologize for shooting him and ruin his life.
  • Better to Die than Be Killed: After his identity exposed, he kill himself and has his conscious trapped inside his own Id well.
  • Big Bad: He's the main antagonist of the series and he is responsible of turning people into serial killers.
  • Evil All Along: In episode 11, it is revealed he's John Walker and responsible for creating serial killers.
  • Evil Counterpart: To Shirou Kokufu (before he replace him). In the sequel manga and series finale, Kokufu is willing to help Wellside with their investigations, Hayaseura doesn't help them at all and he only observe the investigation instead.
  • Eyes Always Shut: He never open his eyes and the only time he open his eyes in Episode 11 where Hondomachi found out his true identity. In Episode 12, his eyes open again reveals he has red eyes.
  • Manipulative Bastard: He's responsible for the chain of events that occurred.
  • Never My Fault: He claims that his work was for the greater good and that he's never actually partaken in any of the carnage that had happened. Narihisago isn't buying any of his lies.
  • Red Eyes, Take Warning: In his last moments, he has red eyes as the result being a dangerous serial killer.

John Walker

A mysterious, elusive figure, he is theorized to be the man creating various serial killers and sending them out into the world. Walker's true identity is Takuhiko Hayaseura.

  • Expy: Of the Johnnie Walker whisky mascot. May also double as a Shout-Out to James Ellroy’s White Jazz in which a serial killer credits “his friend Johnnie Red” as inspiration for his murders.
  • The Corrupter: John Walker, whose blurry image appears in the Wells of multiple serial killers and is probably the reason for them becoming serial killers in the first place.
  • The Dreaded: No matter who's id well he's in, the "locals" of that mind are terrified of him when they are aware of his presence.
  • The Faceless: In the ID wells, his face is completely censored in order to keep his true identity a secret.
  • The Speechless: He never spoken a single word when he's in someone ID wells.


Voiced by: Manabu Muraji (Japanese), Charles C. Campbell (English)

The persona adopted by Takuhiko Hayaseura when he kills himself and flees into his own id well to escape arrest.

  • A God Am I: He admits that he has a god complex after Hondomachi figures out his fascination for the number 7. He sees himself as the one in control of everything and planned to limit the criminals he created to only 7 members.
  • Cane Fu: He uses his cane to deflect Sakaido's attacks.
  • Digital Avatar: His appearance is based on John Walker's appearance except his face is fully exposed.
  • Healing Factor: After Hijiriido lead a shark to eat him in The Challenger's ID well, but his wounds heal instantly due to his body already dead in the real world.
  • Laughing Mad: He is seen laughing mad after he found out he killed Kaeru and he remember who he was in his own ID well.
  • Logical Weakness: Because Uraido cannot be physically hurt in the other Wells, Fukuda's Well was the right domain to weaken Uraido because Fukuda's mind was broken, which affected Uraido's John Walker avatar in the first few episodes. This makes him exposed to physical actions. He's also an avatar of the Well, so he's susceptible of being stuck in a Dogma when entering into a Well Cockpit in the Well.
  • Nigh-Invulnerability: Hurting Uraido in any other Well won't really do anything because he can simply regenerate himself. But this isn't the case in Fukuda's well, where the conditions work differently and against him.
  • "Not So Different" Remark: He tries to sway Sakaido by telling him that they are not so different as criminals and that they both could join forces instead. Sakaido obviously refuses to believe that.
  • Out-Gambitted: Hondomachi and Sakaido steal his hat, provoking him into following them, only to end up in Fukuda's well where he is greatly weakened and tricked into sitting in a Well Cockpit.
  • Portal Crossroad World: His ID well is one of these thanks to his connection to Kiki Asukai, who in turn is connected to countless serial killers. When Kiki makes him remember his true identity, his well changes to a dark, muddy cavern full of masks that act as portals to other ID wells.
  • Red Eyes, Take Warning: As Uraido, he has bloody red eyes and it shown how dangerous he is as a serial killer.
  • Sealed Evil in a Can: Sakaido and Hijiriido defeat Uraido by sealing him inside Kiki's ID well forever inside Fukuta's ID well.

    The Pyrotechnician 

Koji Huyukawa

Voiced by: Daisuke Hirakawa (Japanese), Jeff Johnson (English)

A former soldier who found beauty in carnage and disappointment in other people, he earned his moniker of "The Pyrotechnician" due to his destructive explosions that caused massive property damage and loss of life, earning him the ire of Kura.

  • Magic Plastic Surgery: Subverted. He has had several plastic surgeries to help make him harder to track.
  • Shell-Shocked Veteran: He was a former soldier who experienced the horrors of war during a mission. This broke him enough to gain a twisted love for the destruction he saw, so much so that he tried to recapture that "beauty" as The Pyrotechnician.
  • Villainous Breakdown: He loses it when Narihisago exposes him as a sadist and tries to deny everything he said. This causes him to commit suicide later that night at Narihisago's encouragement.

    The Gravedigger Copycat 

Genpei Oono

He is a copycat killer who, inspired by the crimes of "the Gravedigger", kidnapped Keiko Kikuchi, attracting the attention of the Kura.

  • Laughing Mad: He does this after the police found out all the effort to save Keiko Kikuchi was for nothing since she's already dead.
  • Would Hit a Girl: He has not problem sealing Keiko Kikuchi inside a barrel alive until she dies from lack of oxygen.

    The Gravedigger 

Haruka Kazuta

Voiced by: Chikahiro Kobayashi (Japanese)

He is one of the Gravediggers and a surviving victim of the Perforator.

  • All Love Is Unrequited: Downplayed. He has a crush on Inami since middle school, but she didn't return her feelings for him because she refuses to admit it.
  • Ambiguously Bi: He has a crush on Inami, but according to Nishimura, the gender of his victims probably doesn't matter even if his brain's attempt to process murderous intent and romantic impulses are switched. It's implied he's kissed all of his victims before he buried them alive, male and female, as the "victim" in his id well who cycles between aspects of all of them treats him as a guy with a crush that they are supposed to ignore.
  • Empty Eyes: He is the only character so far shown without any pupils.
  • Even Evil Has Loved Ones: He never betrays or kills Inami because she the only one he loves deeply.
  • Gone Horribly Wrong: After he had his head drilled by the Perforator, he becomes a dangerous killer who buried his victims alive. According to Hondomachi, the damage of his head swapped his emotions completely, rendering killing people as a sign of love.
  • Killed Off for Real: He is stabbed in the heart by Hondomachi with a knife. The last thing he did was reaching his hand to Inami before he died.
  • Kiss of Death: Subverted. He kisses his victims as a sign of his drive to kill before he buries them alive.
  • Scars Are Forever: He has the scar he received from the Perforator, much like the Perforator's own and Hondomachi's.
  • The Speechless: He hasn't spoken a single word before and after his death. It implies the damage to his brain from Fukuda, he lost the ability to talk and speak.

Nahosi Inami

Voiced by: Ayane Sakura (Japanese), Bryn Apprill (English)

She is the one who influenced Kazuta to kidnap and bury the hostage inside the box and do a Live Telecast of their suffering.

  • Avenging the Villain: In episode 12, she clearly wants revenge on Hondomachi for killing Kazuta. She attempts to kill Hondomachi herself until Fukuda sacrifice his life to save her. After she kills Fukuda, she no longer has interest killing Hondomachi anymore.
  • The Bus Came Back: She reappear in Episode 12 after being absent for five episodes.
    • In the manga sequel, after being seemingly died in her lover's ID well, Inami returned again and will start to work as a Brilliant Detective.
  • Death by Irony: She ends up dying similar to Kazuta's where she tries to reach her hand to the past version of Kazuta before she died.
  • Dies Wide Open: She died in Kazuta's ID Well with her eyes open after being stab from behind by John Walker.
  • Dying Declaration of Love: Before she dies from her wounds, she was about to confession her love to the past version of Kazuta, but she wasn't able to in Kazuta's Id well.
  • Disappeared Dad: Her father wasn't mentioned or seen in the show, but it implies her father is dead or abandon her before or after she was born.
  • Emotionless Girl: As a result her mother's suicide when she was in middle school, she rarely shows any emotions to anyone. Subverted when Kazuta dies in front of her.
  • In the Back: She gets fatal wounded from behind by John Walker inside Kazuta's ID well.
  • Not So Stoic: She doesn't show any emotions, but the only time she shows emotions when Hondomachi killed Kazuta and he kissed her right in front of Inami.
  • Parental Abandonment: Inami's mother committed suicide by jumping in front of a moving train, which Inami was traveling on, when she was 14 years old.
  • Platonic Life-Partners: Subverted. She insists her relationship with Kazuta is platonic, but when Hondomachi mentions she and Kazuta kissed, she becomes jealous. It is a hinted that she does have feelings for Kazuta, but she doesn't want to admit it.
  • Sadist: She enjoys seeing people in pain and watches Kazuta's victims die of suffocation on the live feed.
  • Too Dumb to Live: Hondomachi warns her not to go to Kazuta's Id well, but she didn't care and all she wants was to see Kazuta again. As the result, John Walker kills her from behind.
  • Uncertain Doom: It is unknown if she will be revived or stay dead once Kiki is put back in the Mizuhanome or kill by Momoki. It implies she prefers to stay dead in order to be with the real Kazuta in the afterlife. In the series finale, her body in the real world wasn't shown, but it seems she shares the same fate as Fukuda.
    • In the manga sequel, it was revealed that Inami is still alive and bedridden and will start to work as a Brilliant Detective.

Female (right); Male (left)

Nahoshi Inami's persona within id wells. The fifth "brilliant detective", they was created when, under a period of intense pressure, Shirou Kokufu authorized Inami's appointment as a Mizuhanome pilot, despite being comatose at the time.

Unlike other brilliant detectives, Hakaido is split in half: Hakaido herself, based on Inami and another completely separate person based on Haruka Kazuta.

  • Digital Avatar:
    • Hakaido is similar to Inami in terms of physical appearance, with slightly shorter, pale pink hair. She wears a white kimono on top of a red bodysuit covering her entire body barring her fingers. She also has multiple red ribbons tied around her body, as well as a red blindfold over her eyes, which are implied to not even exist at all.
    • Hakaido's helper is similar to Kazuta, bar appearing somewhat younger, being a young man with short, somewhat spiky hair. He wears a long black coat with white stripped shoulders, arms and a collar, as well as a matching hat.
  • Ethereal White Dress: The female Hakaido wears a pure white kimono instead of wearing a detective outfit.
  • First-Name Basis: She is only referred to by her first name because she can't remember her full name.
  • Literal Split Personality: According to Habutae, Inami's personality has been divided into two people inside an Id well. Hakaido takes the form of Hahoshi Inami and inherits most of her personality. Hakaido's helper takes the form of a younger version of her former boyfriend Kazuta, who is helpful, loyal and obedient towards Hakaido.

    The Challenger 

Denshin Katsuyama

Voiced by: Tomokazu Sugita (Japanese), Brian Mathis (English)

He is known as "The Challenger" for kidnapping his victims and challenging them to brutal deathmatches. He is the one responsible for the deaths of Ayako and Muku Narihisago.

  • Blood Knight: Zigzagged. While he likes to fight anyone that can give him a good challenge, he is not above beating up women and little girls. Even Narihisago cheating with a weapon in the ID Well only brings more excitement for himself.
  • Combat Sadomasochist: He loves inflicting pain on others and anyone who can hurt him back excites him. Narihisago rightly calls him a sick fucking pervert.
  • Evil Laugh: He gleefully giggles during his fight with Narihisago in Kiki's ID Well.
  • Eye Scream: In Kiki's ID well, he lose his right eye from Narihisago when he's beating him to death before he can kill Muku.
  • Hate Sink: It's very clear that The Challenger has no redeeming qualities, making his defeat by Narihisago's hands very much deserved, both in reality and fantasy.
  • Lack of Empathy: He's shown to not consider anyone's feelings.
  • Mixed Martial Arts: He uses MMA fighting skills for his criminal activity. He's much more skilled than Narihisago in their fight in Kiki's ID Well, breaking Narihisago's arm and severely injuring him with MMA moves before losing the fight because Narihisago chose to play dirty.
  • Posthumous Character: He was killed by Narihisago three years ago before the start of the series.
  • Would Hurt a Child: He has no problem beating up children, even little girls. Narihisago's daughter, Muku, was sadly beaten to death.
  • Would Hit a Girl: He has no problem attacking women and killing them by beating their face in like he did to poor Muku. He almost killed Kiki Asukai this way but she was saved in time by Narihisago.

    The Face-lifter 

Hitoshi Sonoda

He is known as "The Face-lifter", his modus operandi was to remove his victims' faces, before being caught by Kura and driven to suicide by Akihito Narihisago.

  • Tear Off Your Face: After he had a talk with Narihisago in person, he attempt to peel off his own face and then commit suicide by hanging.
  • Would Hit a Girl: He has no problem peeling women's faces off and peeled off Kiki's face in one of her dreams.


Mana Tsurumi

She's one of the main antagonist of the #BRAKE BROKEN. She's an escape artist who gets her victims into car accidents and she somehow manages to survive from the crash. She makes her escape before the police can find her.

  • An Arm and a Leg: She loses her right arm and left leg after she fail to kill Fukusen in a car crash.
  • Bifauxnen: She's androgynous woman dressed in men's clothing. At first, it's hard to tell if she's really a male or female until Hondomachi confirmed her gender.
  • Boyish Short Hair: She has short spiky black hair.
  • Canon Foreigner: She is one of the original characters who doesn't appear in the anime.
  • Death Seeker: She views death is just the beginning and as a great pleasure.
  • Near-Death Experience: After she fail to kill Fukusen, Mana almost died from her wounds until Hondomachi saves her by giving her CPR and get medical treatment.
  • Sadist: According to Hondomachi, she enjoys getting involve in accidents and witness her victims get killed right in front of her.
  • The Scapegoat: Willingly to be the fall guy because she thinks that she's the chosen one by the real culprit.

    Minor Serial Killers 

The Tongue-Tearer, Thigh-Severer, and Arm-Twister

The three serial killers mentioned by Narihisago in Kiki's ID well.

  • An Arm and a Leg: The Thigh-Severer and Arm-Twister cut off one of their limbs and died from blood loss thanks to Narihisago, driving them to commit suicide with their own methods.
  • No Name Given: Their real names from before their deaths are unknown.
  • The Speechless:They never spoken a single line before their deaths.
  • Tongue Trauma: Tongue-Tearer has a method of cutting off her victim's tongues.


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