Sukeban Deka Project
- Played By: Yuki Saito
The series' heroine, a delinquent girl turned detective in order to save her mother from death penalty.
- Action Girl: Gets in a lot of fights.
- Adaptational Wimp: In the TV series, she's mentioned to have broken her dominant right hand while punching a fellow inmate the juvenile detention center, which forced her to become left-handed and a bit weaker. This was written for the series because her actress Yuki Saito is naturally left-handed and it would be easier for her that way. (Ironically, the actress of the next Saki, Yoko Minamino, is a left-hander as well.)
- Biker Babe: Drives a Kawasaki GPZ 250 in the TV series.
- Book Dumb: She has quite bad grades, as she lacks both time and interest to study. Principal Numa believes she would improve a lot with a bit of effort, though not in English - she's really bad at that.
- Boxed Crook: A former thug recruited to put her talents to good use.
- Catchphrase: The TV series gives her "Temera, yurusenee!" ("You won't be forgiven!"), which became a tradition for the next Sakis. She did say it and other similar lines in the manga, only not as often.
- Charles Atlas Superpower: She's stated to be incredibly strong for a girl her age and size.
- Fingerless Gloves: In the TV series, she wears a black one in her left hand in order to help use her yo-yo.
- Hammerspace Hair: The OVA features a rare serious instance of this trope when she pulls out her yo-yo from her hair.
- Improbable Weapon User: Her yo-yo is the proof.
- Insistent Terminology: In the TV series, when it is needed for her to reveal her true identity, she prefers to introduce herself very formally and only add at the end "...also known as Sukeban Deka".
- Killer Yo-Yo: One of the best known examples in media (at least Japanese media, where she's the Trope Codifier).
- Japanese Delinquents: She's the titular sukeban after all.
- Pint-Sized Powerhouse: A petite teenage girl who can diss out beatdowns to grownups.
- Rapunzel Hair: Has very long hair in the manga and OVA, at least to her knees.
- Smoking Is Cool: In the manga, as an additional delinquent trait.
- Spared by the Adaptation: She dies at the end of the manga. In the TV and film continuity, she only seems to die in a burning house; it's later revealed that she survived, worked some time with Kira and went to have a daughter.
- Sir Swears-a-Lot: As expected of a delinquent.
- Teen Superspy: Super Cop in this case.
- Played By: Yoko Minamino
Saki's replacement in the Sukeban Deka II TV series.
- Action Girl: Although not as strong as the original Saki, per Word of God, she is close.
- Biker Babe: Similar to the first TV Saki, she likes to drive a Kawasaki GPZ 400 R.
- Canon Foreigner: Was created to replace Saki in the second series.
- Contrasting Sequel Protagonist: Unlike Saki, Yoko wasn't a sukeban by choice, but because people bullied her due to the iron mask she was forced to wear. She also accepted her job not to save her jailed mother, but to find her disappeared father.
- Country Mouse: She was brought up in the Kochi Prefecture countryside, so she's unfamiliar with the big city of Tokyo.
- Dark and Troubled Past: She was forced to wear iron masks for all her childhood and early teens, which scared her classmates away from her.
- Fingerless Gloves: Wears a red one in her left hand in order to help use her yo-yo.
- Killer Yo-Yo: Her is an advanced version.
- Legacy Character: She's given the name of Saki Asamiya, and that's what she is referred as. Ironically, Yoko Godai is revealed to be a fake name as well, with the surname Godai being her mother's maiden one. Yoko's true name is Shiori Saotome.
- Played By: Yui Asaka
The third Saki, featured in Sukeban Deka III.
- Action: Even more than the previous Sakis, being a ninja and such.
- All-Loving Hero: In marked contrast to her predecessors, she's a a kind, pure-hearted girl.
- Book Dumb: Self-described as better at sports than studying.
- Contrasting Sequel Protagonist: Yui broke the pattern of every Saki Asamiya being a tough cynic by virtue of being a hyper, slightly ditzy idealist, to the point she was barely the delinquent she boasted of. She was also completely inept in using the yo-yo and had to be trained onscreen for it.
- The Ditz: Has her moments, especially around the beginning of the series.
- Hot-Blooded: She called herself Kyushu's greatest sukeban.
- Legacy Character: She inherited the codename Saki Asamiya, but unlike Yoko, she was rarely referred as such.
- Martial Arts Headband: As fitting for a ninja girl.
- Ninja: She's a kunoichi.
- Played By: Aya Matsuura
The last Saki, appeared in the 2006 film. She's implied to be the daughter of the original Saki.
- Action Girl: As always.
- Canon Foreigner: She's an original character created for the 2006 movie.
- Contrasting Sequel Protagonist: Now in contrast to Yui, K is possibly the most aloof of all the Sakis, though she defrosts a bit through her movie.
- Generation Xerox: She's revealed to be the daughter of the original Saki.
- Dramatic Dislocation: She dislocates her own shoulder to escape her bindings in the police station and then relocates it back herself.
- Legacy Character: She's turned into what is technically the fourth Saki Asamiya. (It's mentioned that a previous Sukeban Deka agent was tasked with her mission before her, but given that they hoped K to go undercover as Saki Asamiya, the previous must have sported a different codename.)
- Only Known by Initials: Her name beyond the initial K is never said. Some have interpreted it as meant to be the Japanese name Kei.
Metropolitan Police Department
- Played By: Hiroyuki Nagato
Chairman of the Sukeban Deka project and Saki's superior in the force.
- Adaptational Badass: Technically. He was some kind of Metropolitan Police agent in the manga and OVA, but in the TV series he used to have a higher job in the Ministry of Justice and works over the Metropolitan Police rather than being part of it.
- Adaptation Origin Connection: In the manga and OVA, he's just an unknown police agent. In the TV series, he turns out to be one of the officers on case of Natsu Asamiya, one who resigned in exchange for her execution to be delayed due to his suspicions that she had been framed.
- Big Good: He's in charge of the Sukeban Deka project and has almost limitless influence over the Japanese police.
- Cool Shades: Never seen without them, to the point in the manga Saki nicknamed him "Shades".
- Demoted to Extra: In Sukeban Deka II, his role of giving missions directly to Saki is passed to Nishiwaki, with the good inspector being relegated to make cameos and sporadic appearances.
- Everyone Calls Him "Barkeep": "Dark Inspector" or "Dark Director" (Kurayami Keishi) is all he is known as. Even the Mizuchi family's cronies in the OVA call him as such when he appears. Fans used to speculate "Kurayami" was his actual surname, but this was Jossed by Shinji Wada, and his real surname was later revealed to be Kurami.
- Forgotten First Meeting: In the TV series, he first met Saki when she was 6 in her mother's case.
- Punny Name: His real surname is Kurami, just as "Kurayami" ("Dark").
- Sunglasses at Night: Most notably in the OVA, when appearing in the Mizuchi house.
- Played By: Koji NakaVoiced By: Nachi Nozawa (image album), Akira Kamiya (OVA)
Saki's liaison, a suave cop who works for the Dark Director.
- Adaptational Backstory Change: In the manga continuity, he was raised in London, became a private detective in Japan and worked in several cases in both Japan and United Kingdom before being hired by the Dark Inspector. In the TV series, he was born in Japan, studied several degrees of criminal science (although it is implied he did it abroad) and went to become a member of the Metropolitan Police.
- Adaptational Job Change: In the manga and OVA, he's an independent private detective working for the Metropolitan Police. In the TV series, he's a full-fldged Japanese Metropolitan Police officer.
- Adaptation Relationship Overhaul: The TV series removes his romantic involvement with Saki.
- Badass in a Nice Suit: Always wears a proper suit.
- Canon Immigrant: He originally debuted in another manga by Shinji Wada, Hourglass of Love and Death, where he was a secondary character. His popularity led Wada to ascend him to the main character of more stand-alone stories, and he eventually moved him to Sukeban Deka.
- Chick Magnet: Only that the chicks he attracts are not always of the good kind.
- Cool Shades: Traslucent, colored glasses.
- Killed Off for Real: He dies saving Saki in the manga, while in the TV continuity he is shot by Remi after rescuing Sanpei.
- Long-Haired Pretty Boy: Has waist-length hair in the manga and OVA. His TV self has a less conspicuous short hair.
- Private Detective: Jin doesn't really work for the Japanese police in the manga and OVA, he's just a private detective hired by Dark Inspector as part of his undercover services.
- Stealth Hi/Bye: Has this habit in the TV series, which greatly annoys Saki.
- Played By: Keizo Kanie
The second Saki's liaison, a serene undercover cop.
- Canon Foreigner: He was created for the second TV series, although has elements of manga character Mumisa.
- Suspiciously Similar Substitute: To both Jin and Mumisa.
- Stern Teacher: He works undercover at the girls's school as a ceremonious teacher, specifically Yoko's homeroom one. Funnily enough, Yukino and Kyoko never discovered this until the very end of the series, having assumed that Yoko received her missions through more orthodox means.
- Team Dad: To the Sukeban Deka II girls. Bonus points for being a former friend of Yoko's father, Shichihiro Saotome.
- Played By: Riki Takeuchi
The fourth Saki's liaison, a grumpy veteran detective working for the Dark Inspector.
- Ambiguous Situation: He's strongly implied to be K's father, or at least to feel as such due to a possible relationship with her mother - he keeps the first Saki's yo-yo and carries a photo of a child K that doesn't want her to find. Nothing is revealed in the film itself.
- Canon Foreigner: He's an original character created for the 2006 film.
- Cool Old Guy: Grumpy but skilled at his job.
- Luke, I Am Your Father: Averted. Might or might not be K's father, but this is never addressed.
- Noodle Incident: How he got his limp during a mission with the first Saki Asamiya is never revealed.
- Tragic Keepsake: He keeps a Sukeban Deka yo-yo implied to belong to the first Saki.
- Played By: Yasuyoshi MatsudaVoiced By: Hiroshi Takemura
One of Saki's early allies in highschool.
- Bald of Awesome: In the manga and OVA, he shaves his hair, much to Saki's shock, after she states she dislikes long-haired guys. This trait was Adapted Out of the TV series.
- Dogged Nice Guy: Towards Saki, before falling in love with her sister Miyuki.
- Happy Ending Override: Sanpei eventually becomes CEO of his father's company and got to marry Miyuki, only to be ambushed and murdered by Remi and her goons on his wedding night.
- Masculine Girl, Feminine Boy: The feminine boy to Saki's masculine girl.
- Non-Action Guy: He's not a good street fighter and mostly leaves Saki to do the physical work.
- Spared by the Adaptation: He dies in the manga murdered by Remi, while in the TV series he survives the arc. The OVA might also count, as although its compressed plot doesn't include the event in which he's supposed to die, the early defeat of Remi makes sure he will not die at her hands.
- Played By: Akie HayashidaVoiced By: Naomi Uchiyama
- Nice Girl: A sweet, pure-hearted girl.
- Too Good for This Sinful Earth: It's no coincidence she's killed by the most evil character in the series up to that point.
- Prone to Tears: Particularly in the OVA, where her character design looks about to cry all the time.
- Spared by the Adaptation: She dies in the manga and OVA, but lives in the TV series.
- Played By: Sei HiraizumiVoiced By: Akio Ohtsuka
Takanoha High's principal.
- Cool Old Guy: Unlike other teachers.
- Enemy Mine: He doesn't like entirely Saki due to her past as a delinquent, but he comes to respect her and eventually accepts her help against the Mizuchi sisters.
- Reasonable Authority Figure: He's a reasonable school principal. It's only that he has his hands tied due to the Mizuchi family's influence.
- Stern Teacher: Or at least tries to be.
- The Last DJ: He punches one of his students in the face for implying that he'd be bribed to falsify the student's grades, like all of the other teachers had done with the other rich students who'd transferred into Takanohana High according to the Mikazuchis' G-Plan.
- Played By: Akie Yoshizawa
One of the second Saki's two best friends.
- Action Girl: Is trained in traditional Japanese martial arts, both armed and unarmed, particularly in a style named Yamada-ryu.
- Canon Foreigner: An original character created for the second TV series.
- Lonely Rich Kid: Implied to be, at least until she met Yoko and Kyoko.
- Naginatas Are Feminine: Uses one to fight, which fits her image.
- Parasol of Prettiness: Often seen with one.
- Wolverine Claws: Another of her weapons is a tekagi-shuko, a real life ninja set of blades worn in the arm.
- Yamato Nadeshiko: She's heir of a family that owns an important zaibatsu, and has been brought up as such.
- Played By: Haruko Sagara
One of the second Saki's two best friends.
- Action Girl: A veteran street fighter.
- Canon Foreigner: An original character created for the second TV series.
- Defeat Means Friendship: She fought Yoko when they met for the first time and became her friend upon losing.
- Hot-Blooded: Even in comparison to Yoko.
- Improbable Weapon User: Even more than Saki and her yo-yo. Kyoko is an expert at using marbles to fight.
- Red Baron: "Marble Okyo" or simply "O-kyo".
- Street Smart: She's from Shinjuku, which is known to be a nasty district, and is just as street-wise herself.
- Played By: Isao Kamata
- Played By: Ayako Kobayashi
Yuka and Yuma Kazama
- Played By: Yuka Onishi and Yuma Nakamura
- Played By: Mayumi Shimizu
- Adaptational Heroism: In the manga, she was a crazy killer who murdered her husband, abused Saki basically for not being her sister Miyuki, and joined Shigaraki trying to have Saki killed; only at the end, and after some severe mental trauma, she revealed to have some love for her and died saving her life. In the TV series, she is a loving wife and mother that led accidentally to her husband's death and cannot forgive herself for it.
- Adaptation Origin Connection: In the TV series, she was Gozo Mizuchi's secretary, which she capitalized on to try to uncover his crimes along with Toshiya.
- Played By: Tetsuo Hasegawa
- Adaptational Heroism: Not to the extent of Natsu, but still. The original manga had him as a bumbling alcoholic with dubious business, while his TV version is a serious journalist that was murdered for trying to uncover the Mizuchi family's misdeeds.
- Ascended Extra: He is much more important to the plot in the TV series.
Miyuki OzakuraSaki's sister. She was adopted into the wealthy Ozakura family.
- Played By:Akiko Izumi
Yoko's mother, who trained her in Tosa.
- Mentor Occupational Hazard: Dies to give the story a push.
- Played By: Hiroshi Miyauchi
An archaeologist and Yoko's father.
- Genius Bruiser: He was known as a strong martial artist aside from a genius archaeologist.
- Played By: Goro Mutsumi
Butler of the Saotome's family.
- Played By: Natsumi AsanoVoiced By: Saeko Shimazu
- Attention Whore: When pressed by Remi about her motivations as an artist, Emi's forced to admit all she cares about is becoming world famous through her paintings.
- It's All About Me: She only cares about becoming famous and coldly turns down Ayumi's plea for help against Saki Asamiya.
- Laughing Mad: In the OVA, after she and her father are arrested and Emi's exposed as a fraud, she begins to maniacally laugh as reporters take photos of her and her dreams of fame crumble. She's killed literal seconds later by one of Remi's brainwashed lackeys.
- Mad Artist: As in literally mad - her artwork is good though not excellent, but she's a crazy psycho.
- Spared by the Adaptation: She lives in the live action series, being simply arrested, while Remi has her killed by a mook in both the manga and the OVA.
- Played By: Yasuko EndouVoiced By: Urara Takano
- Biker Babe: In the manga.
- The Brute: Is the most physical and least ambicious of the Mizuchi sisters.
- Evil Counterpart: At least thematically, to Saki. The latter was a thug who kept it for herself while Ayumi leads an entire gang.
- Four Is Death: Has four Elite Mooks.
- Idiot Ball: Is the only person in her family to suspect Remi's motives, but then gratefully accepts a shotgun from her when it's proposed she can kill Saki with it. She gets killed by this when it turns out the shotgun's rigged to explode, shattering her skull and destroying her hands until she finally bleeds to death.
- Japanese Delinquent: A straight sukeban like Saki in contrast to her more refined sisters.
- Noble Demon: She's much more honorable and sane than her sisters.
- Only in It for the Money: Her main motivation.
- Spared by the Adaptation: She lives in the live action series, being simply arrested, while she is killed by Remi in the manga and OVA.
- Token Good Teammate: Subverted. Her sisters are so psychotic that they make Ayumi look heroic by comparison, but she is still evil and working along with them.
- Whip It Good: In the TV series, she uses a whip, just like her sister.
- Played By: Hitomi TakahashiVoiced By: Masako Katsuki
- Animal Motifs: Snakes. She has several pet snakes, her weapon of choice is a snake-like whip and she is a diabolical Smug Snake. She is even called a viper by Saki and Jin a few times.
- Alpha Bitch: Although her evil goes far beyond than most villainous schoolgirls.
- Arch-Enemy: She becomes Saki's thanks to Saki being the only person who saw through her facades of being the White Sheep of her family and simply being Gozo Mizuchi's evil oldest daughter, recognizing her as a manipulative psychopath willing to sacrifice every person in her way. To that end, Remi becomes devoted to destroying all aspects of Saki's life but begins to hope for Saki to evade her traps so they can keep fighting one another.
- Big Bad: Of the first part of the manga, the OVA and first TV series.
- Card-Carrying Villain: She absolutely loves being evil and wastes no time in ranting about the beauty of her horrific actions.
- Even the Girls Want Her: She has a cadre of female admirers.
- Evil Feels Good: Remi practically gets off on the idea of being evil. When she confronts Saki for the first time in the manga, Remi declares how the flowers of evil are beautiful, blood red blossoms that thrive by sucking the life out of weaker ones. She then makes her intentions known to surpass all other villains and gain enough power to become a massive, unseen evil terrorizing the world.
- Face of an Angel, Mind of a Demon: A beautiful wealthy teenage girl who is also a psychopathic criminal mastermind who has no problem with killing her own sisters to save her own skin.
- Game Face: Her monochromatic blue eyes change to fierce snake-like eyes during her confrontation with Saki.
- Hair of Gold, Heart of Gold: Big, big, big aversion. Her hair may be blonde (at least in the manga and OVA), but her heart is malicious. Shes a manipulative and psychopathic Sadist, willing to sacrifice every person in her way (even members of her family), who absolutely loves being evil and wastes no time in ranting about the beauty of her horrific actions.
- Hannibal Lecture: She tries to break Saki by mocking her for having a mentally ill mother on death row and that crime and insanity runs in Saki's family. Saki reacts to this by knocking Remi out with her yo-yo.
- Hellish Pupils: Her creepy reptilian eyes that are her default expression when she doesn't pretend to be a nice girl.
- Master of Disguise: She managed to masterfully impersonate Saki's sister Miyuki after the murder of Sanpei.
- Ojou Ringlets: As part of the package to make her look like the heroine of a regular shoujo story, her blonde hair is voluminous and has appropriate curling.
- Psycho Lesbian: Her sisters arrogantly deride her as a "dyke" and Ayumi believes she only wants to assume control of their high school so she can prey on young girls to her heart's content. Remi gently laughs and even takes this as a compliment, but it turns out Ayumi had no clue what she really wanted.
- Rich Bitch: Incredibly wealthy and a complete bitch.
- Sadist: Remi has a blast brutalizing Saki with her whip.
- Smug Snake: The worst of the three.
- Take Over the World: She plans to eventually take over all the schools in Japan.
- Whip It Good: She fights with a whip.
- Worthy Opponent: Remi views Saki as this, stating she's grateful to have met the type of adversary few people ever encounter in their lives. So much so that part of wants to see Saki evade her traps so they can keep fighting one another to their fullest.
- Played By: Shigeru KoyamaVoiced By: Tomomichi Nishimura
The patriarch of the evil Mizuchi family.
- Adaptational Badass: In the manga and OVA, he was pretty much the puppet of Remi's evil plans all along. In the live action series, Gozo is the plot's true mastermind instead of Remi, actually since long before she was even born, and Remi now plays more or less the role of The Dragon to him.
- Adaptation Relationship Overhaul: In the TV series, he was twistedly in love with Natsu, whom he raped.
- Ascended Extra: Has a much more important role in the series, where he was already the main villain before Remi and Saki were born.
- Played By: Satoshi Morizuka
The mastermind behind the story's second part, a mysterious and well-connected old man.
- Adaptational Species Change: The manga implies he is some kind of Yōkai, while his live action series is a regular human seeking to become immortal.
- Adaptational Wimp: In the TV series, he is a human who wants to become immortal through the powers of the treasure of Kino Ryo. In the manga, he was already immortal, and was implied to be not a human to begin with.
- Big Bad: Of the manga's second part.
- Composite Character: His live action version is conflated with manga character Kazuhiko Haniwa, being the leader of the Blue Wolf League in his place.
- Really 700 Years Old: In the manga, he is at least 200 years old.
Aoko Narumi/ShigarakiThe young leader of the world-renowned criminal organization Cat in the manga.
- Adapted Out: From the live action series, where her role is partially played by original character Kyoshiro. This was done likely because Yoko Godai had nothing to do with Remi Mizuchi, which would make Aoko's grudge with her impossible.
- The Dragon: To her adoptive grandfather Rou.
- Villainous Friendship: Was friends with Remi Mizuchi, who she wants to avenge.
- Played By: Naoto Nagashima
The second TV series' resident mysterious boy.
- Big Bad Friend: He's a childhood friend of Yoko.
- Canon Foreigner: Is original to the series, although he fulfills a role similar to that of Aoko in the manga.
- Cool Mask: Wears one most of the time.
- The Dragon: To Rou, or so he thinks, because he's actually being manipulated by him.
- HeelFace Turn: Eventually turns against the Blue Wolf League.
- The Power of Rock: Has the secret identity of the singer of a rock band.
- Redemption Equals Death: Dies shielding Yoko from an attack after rebelling against Rou.
Kazuhiko HaniwaLeader of the Blue Wolf League in the manga.
Hattori / Jishu Kita
- Played By: Masato Ibu
- Big Bad: Of the first film.
- Canon Foreigner: An original character created for the first movie.
- The Coup: Everyone thought he died trying a coup which failed, but he survived and prepared another one.
- Cyborg: Rebuilt himself as one.
- Evil Teacher: He's the principal of a reform school which is actually a camp where he prepares his next coup d'etat by forming the delinquents who are sent to his "reform school" into trained soldiers.
- Played By: Rika Ishikawa
- Played By: Shunsuke Kubozuka