The busty 17 year-old captain of the present Jyuken Club. A third-year student, she can control her body by shrinking herself to the appearance of an 8 year-old. She had a previous relationship with Mitsuomi, but has now sworn revenge on him for the events surrounding the death of her older brother, Shin.
Tropes associated with Maya:
- Absolute Cleavage: As seen above, there is a lot of emphasis placed on Maya's chest.
- Action Girl: She's the strongest fighter in the Jyuken Club, and one of the best in the entire school.
- Always Someone Better: To her younger sister Aya.
- Badass Normal: She doesn't have any supernatural powers, unlike her sister and other main characters.
- Empowered Badass Normal: After she is revealed to have the Amaterasu Dragon Gate.
- Broken Bird: Currently has a strained relationship with Mitsuomi Takayanagi due to events in their past, and can be sad or broody at times.
- Dual Age Modes: She can appear as an 8 year old or a 17 year old.
- Go Out with a Smile: In the last chapter, she gladly sacrifices herself to save Soichiro.
- Hair Antennae: Lampshaded several times in-universe.
- Hair Intakes: Her hairstyle has two intakes that look like cat ears.
- Heroic Sacrifice: Absorbs and nullifies the many, many powers that Souichiro has absorbed, as well as his ability to absorb them, in order to free him from his father and from the power of Susano'o. There was so much that she ends up dying as well to save him.
- Intimate Healing: She performs this on Souichiro via mouth-to-mouth when he had exhausted himself during his early training using ki. It goes over with Aya as well as could be expected.
- Master of the Mixed Message: Part of the reason Souichiro became so enamored with her, and why Aya (and occasionally Mitsuomi) is so upset with her. In Souichiro's case it turns out that she really didn't mean to turn him on, but her naturally sexy demeanor and poor choice of words throws both Souichirou and Mitsuomi for a loop.
- Ms. Fanservice: She doesn't seem to mind being naked or half-naked more often than not. Includes Furo Scenes, Modesty Towels and a lot of Panty Shots.
- Mystical White Hair: Her nullifying powers make her qualify as one
- Nice Job Breaking It, Hero!: Her rebellion against Shin's group and disregard for her own safety contributed to Shin's rampage against his own comrades, which broke up KATANA and forced Bunshichi to beat sense back into Shin at great injury to both of them (Shin lost the use of one of his eyes and Bunshichi's legs were extremely damaged). Moreover, when Shin was driven into one of his most dangerous rages yet, her concern for Mitsuomi was what caused Shin to hit Mitsuomi with a dangerously crippling ki strike.
- Older Than They Look: Three words: "Body Refinement Technique".
- Power Nullifier: It is eventually revealed that Maya possesses the Amaterasu Dragon's Gate, which cancels out "Red Feather" powers. This is the real reason why she was entrusted with Reiki, as she was able to keep it in its sealed state with her Gate's power. Her power is also integral to sealing away the powers that Souichiro has collected in his body by the end of the manga.
- Sexier Alter Ego: actually inverts this trope. Her real form is that of a voluptuous young woman, but most of her time is spent in the form of a young girl, making most people think it is her regular form.Soichiro: "Bob? If that weird little girl suddenly turns into the kind of stacked voluptuous chick you’d see working in a sketchy nightclub, what should I do?"
- Sleep-Mode Size: She uses this to build up ki for future fights.
- The Tease: Oh so very much. To Souichirou and Mitsuomi in particular, sometimes even without realizing it.
- You Remind Me Of My Brother: One of the reasons why she felt an attraction to Souichiro was that he gave off the same aura as Shin did in their carefree fighting days. Mitsuomi even calls her out on it as the main reason she picked Soichiro for her club.
Maya and Aya's older brother, who was the president of the Executive Council and founder of the Jyuken Club. He had the power of the dragon eyes like Aya, but was driven insane by them. His possession of the Reiki is blamed for his insanity. A lot of events in the series are based around Shin's actions and death.
Tropes associated with Shin:
- Ax-Crazy: He's not doing a very good job of keeping his Superpowered Evil Side under control.
- Badass Biker: Enjoys riding now and then, especially when he is calm. He's very good at it, too.
- Berserk Button: Whatever you do, DO NOT go near this guy's sister. It gets to the point that even trying to protect Maya from him pushes this button.
- Big Brother Instinct: Shin's got one, but it's taken to such an extreme (especially after Fu Chi'en used Maya to provoke him) that even getting close to Maya emotionally could set him off, as Mitsuomi found out.
- Bishounen: Of the long-haired variety.
- The Berserker: Whenever he held Reiki, or whenever he thought that he was protecting Maya.
- Death Seeker: In a vision, he saw Mitsuomi as the person who would eventually defeat him. After that, he explicitly tells Mitsuomi that should he lose control, it is Mitsuomi's job to kill him.
- Eyepatch of Power: Starts wearing one after Bunshichi kicks him in the eye to knock him unconscious after their fight.
- Mad Oracle: His Dragon's Eyes give him the ability to see past and future events. Because of his insanity, he cannot control his power and is constantly stormed by visions; he describes it as being within a rainstorm, being able to hear every single raindrop but not to understand their significance.
- Posthumous Character: He died two years before the beginning of the story. His personality and actions are explored through flashbacks.
- Self-Made Orphan: He killed his parents with Reiki after discovering that they planned to separate him from Maya.
- With Great Power Comes Great Insanity: As a result of touching Reiki, he lost control of his powers at a young age, leaving him vulnerable to fits of murderous insanity.
- Worthy Opponent: Saw Mitsuomi as this. Bunshichi also tried to be one to him after viewing Kuzunoha's videotape, and managed to fight him and beat him at his craziest.
Shinichiro Kurei ("The Alien")
Vice-captain of the Juken Club. When people first meet this third-year student, most are shocked and often confuse him with an extraterrestrial because of the size and shape of his eyes, and the fact that he makes misleading sounds when sucking on his juice box. He is very intelligent, respectful, and is knowledgeable concerning technology.
Tropes associated with Shinichiro:
- Awesomeness by Analysis: How he supports his allies in battle.
- Covert Pervert: Likes to take pictures of girls in the shower.
- Fan Nickname: The Alien, even in-universe.
- Mission Control: He's usually in the background, explaining things or suggesting courses of action.
- Gonk: People tend to utterly freak out upon first meeting him. Souichiro and Bob even captured him, and attempted to call the TV stations concerning an "alien sighting".
- Non-Action Guy: He doesn't show any fighting prowess.
- Older Than They Look: He's a third year student, despite his small size and bizarre, alien-like features.
- Only Sane Man: In a school full of people chosen only because of their fighting ability, he's this.
- The Smart Guy: Good with technology.
Kagesada "Asshat" Sugano
A third-year student, he is better known by his nickname Asshat (or Scum in the anime) that was given to him by one of the teachers. During the Election Tournament, he remained hidden with Bunshichi and let Maya, Mitsuomi, and Shin do the fighting. He remained a member, although an inactive one, until Souichiro and Bob asked him to rejoin them in their cause.
Tropes associated with Asshat:
- Badass Normal: He's probably the single most normal fighter in the series other than Bunshichi, since neither of them practice any real martial arts or have any powers. In terms of brute strength alone, he's also likely to be a close second to Bunshichi and Mitsuomi.
- Bodyguard Babes: He has four of them, and they are all smoking hot.
- Brilliant, but Lazy: Womanizes and plays the part of a lazy lech, but is also extremely resourceful in a fight and has the strength to back up his determination.
- Combat Pragmatist: He gets grappled on purpose just for a chance to choke a guy with his glove strings.
- Crouching Moron, Hidden Badass: Shows his colors in the Tournament Arc, when he takes on an entire team by himself as well as their Brainwashed and physically enhanced leader, and wins, despite getting the living tar beaten out of him.
- Embarrassing Nickname: Asshat, as given to him by one of the teachers. It fits.
- Good Old Fisticuffs: His fighting style is traditional boxing.
- Handsome Lech: Complete with a squad of girls that hangs around him and helps him to "fight".
- Hard Work Hardly Works - Averted: It's revealed in a flashback that he's spent every day for the last three years since Shin's death training himself so that he'll be able to be useful to his club.
- Jerk with a Heart of Gold: He comes off as a womanizing prick, but when it comes down to it, he's quite nice to girls and truly cares about his underclassmen in the club.
- Mr. Fanservice: There's a reason why he's always getting around and always has four babes with him.
- Out of Focus: Seen briefly in the anime during the Flashback arc and hardly mentioned during the manga until he proves how good a fighter he is during the Tournament arc.
- Really Gets Around: He literally has an army of smoking hot girls to fight his opponents instead of him.
A second-year, polite boy who trains under Maya. He falls in love with Aya at first sight, but is crushed when she goes for Souichiro. He's an excellent, but often overlooked, martial artist, and can enter into a berserker rage when pushed too far. He is currently estranged from his older brother, Mitsuomi, because of his association with Maya.
Tropes associated with Masataka:
- Adorkable: He's often awkward with girls and he's rather polite when he's not fighting.
- Artificial Limbs: Had to get his hand replaced after Souichiro-turned-Susano'o cuts it off in the big showdown.
- Badass Normal: He's one of the no-special-powers kind of fighters. Still, he manages to defeat his brother Mitsuomi and at the end he becomes the only Worthy Opponent to a God-of-War-possessed Soichiro.
- Berserk Button: Aya fawning over Souichiro proves to be this along with Souichiro disregarding the lunch she made for him.
- Butt-Monkey: The way he is treated sometimes in-series, being a Nice Guy in a school full of Hot-Blooded Delinquents.
- Covert Pervert: A HUGE one, expecially when Aya is involved. Often Played for Laughs.
- Crouching Moron, Hidden Badass: Despite his Butt-Monkey tendencies and Nice Guy nature, he's one of the strongest characters in the series. Souichiro underestimates him in their first encounter and pays dearly for it.
- Curb-Stomp Battle:
- When an untrained Soichiro provokes and challenges him at the beginning of the story, Masataka replies with one of those.
- After several volumes of fading into the background, Masataka comes back with a vengeance, utterly crushing Madoka and later a reanimated Fu Chi'en.
- Later hands one of these to the three strongest members of the Executive Committee while taking hardly any damage at all.
- Dogged Nice Guy: Keeps trying to court Aya despite her lack of interest. Culminates in a Love Confession near the end of the manga, but Aya kindly rejects him.
- Hopeless Suitor: Towards Aya.
- Nice Guy: In contrast to Souichiro, he's a polite and kind young man who usually avoids starting fights for no reason.
- No-Holds-Barred Beatdown: Delivers one to Souichiro in an EPIC manner in the second episode of the anime, when Souichiro uses Aya's home-made lunch to distract him long enough to land a punch. Easily a Crowning Moment of Awesome.
- Oblivious to Love: Madoka Mawari has a crush on him. He doesn't know about it at all, mostly because she can't spit it out.
- Red Oni, Blue Oni: Is one of the blue oni to Souichirou's red, being much calmer and generally relaxed than him (though he can be set off given enough effort, as his early beatdown of Souichiro proves handily).
A first-year student at the Todo Academy and Maya's equally busty younger sister. Like her brother Shin, she possesses dragon eyes, which gives her the ability to see anywhere in the past, present, and possible futures. In addition, it allows her to see and listen to dead, and learn from inanimate objects. So far, she has difficulty controlling it. Since the first time they met, she has devoted herself to becoming Souichiro’s wife, because she believes its fate and it follows the tradition of the Natsume women.
Tropes associated with Aya:
- Action Girl: Not as strong as her sister, but still a high-level fighter in the school.
- Badass Adorable: She is a cute and nice girl, when she's not obsessing over Soichiro or fighting with her own Superpowered Evil Side.
- The Ditz: Despite her superhuman skills, she often comes out as this.
- Feminine Women Can Cook: Cooks most of the meals as Maya can't cook that well. She also makes lunches for Souichiro, which he continually refuses to eat.
- Idiot Hair: One strand of hair that sticks up from the top of her head.
- Katanas Are Just Better: Her Weapon of Choice. Rarely seen without one or a bokken.
- Ms. Fanservice: Even moreso than Maya. Includes Furo Scenes, Modesty Towels, several Shower Scenes and a lot of Panty Shots.
- Muscles Are Meaningless: Since most fighters use ki to improve their strength, Aya can be a thin girl and still be a powerhouse.
- Rapunzel Hair: Her hair reachs her ankles. She could probably trip on it.
- Super-Powered Evil Side: Her Dragon's Eyes go out of control at one point, and she beats Shiro Tagami into a paste with his own weapon.
- Yamato Nadeshiko: Feminine, a good cook, follows the family traditions. Also devoted to becoming Souichiro's wife.
Souichiro Kengo Nagi
A self proclaimed hoodlum, and the heir of the Nagi demon exorcist family. A first-year student, he has been fighting his whole life because of being picked on, due to his lineage and their potential to go out of control as well as their general strangeness. Because of the way he looked and acted, he had little experience with women his own age, until high school. He has problems expressing his feelings toward people, often acting detached or surly even to his friends and family.
Tropes associated with Souichiro:
- All of the Other Reindeer: Was bullied during elementary school, due to his family's exorcist powers. Part of the reason why he became a brawler in the first place.
- Amazon Chaser: He falls in love with Maya after she easily defeats him.
- Brought Down to Normal: In the end, Maya sacrifices herself to remove the power that was consuming him. He also loses the ability to absorb the powers of others.
- Blood Knight: Always looking for a good fight to be excited by. Reaches Death Seeker levels once he becomes Susano'o, as he regards Masataka as his only Worthy Opponent, and, if necessary, the only one capable of murdering him in order to stop him from becoming another Shin.
- Break the Haughty: He starts off as an arrogant punk who thinks he's invincible because he's pretty good at street fighting. He's quickly proven wrong when he fights against Masataka for the first time, who's a highly trained martial artist. It's this vicious Curb-Stomp Battle he suffers early on that inspires him to get serious about fighting and pursue martial arts.
- Combat Pragmatist: He starts off this way at least, using Aya's bento lunch gift she had given him to distract Masataka (who's in love with her) and get in a punch. Unfortunately for Nagi, this proves to be Masataka's Berserk Button and he proceeds to badly beat him.
- Clark Kent Outfit: At first glance, he seems to be short and scrawny in his school jacket only to take it off and reveal that he's positively jacked underneath. Sort of a red herring in the beginning of the series however, since after this reveal he still gets brutally pummeled by Masataka.
- Crazy Jealous Guy: Develops a mild case of this against Mitsuomi for Maya.
- Delinquent: Before getting in the Jyuken Club he was one of these, randomly picking fights with anyone.
- Death Is Cheap: Once he gets control of his father's powers, he demonstrates the ability to revive people and other living beings, though in the case of the cherry tree outside of the Juuken Club's building, it didn't turn out so nicely.
- Decoy Protagonist: It initially looks like he's the hero of the story but towards the end Maya and Masataka take that role.
- Eyepatch of Power: His eye is removed and replaced with Sohaku's before the start of the Tournament Arc, causing him to wear one of these.
- Fate Worse than Death - Averted: Would have ended up with his body, and all the stolen powers, taken from him from his father, who was also a reincarnating onmyōji determined to bring about a thousand-year war.
- First Kiss: Had Aya take his from him, much to his chagrin.
- Hot-Blooded: He's not as stupid as he seems, but at the beginning he really dislikes having to stop and use his brain.
- Hot for Teacher: His feelings towards Maya. Definitely a case of Likes Older Women since she is two years older.
- Jerkass: At first, then evolves to a Jerk with a Heart of Gold.
- Love at First Punch: Definitely for Maya.
- Love Triangle: He falls for Maya, but is liked by her sister Aya (whom he is friends with, despite his loud protestation of Aya's feelings and clinginess).
- Mark of the Supernatural: Sohaku's eye is distinctly different from his own, possessing a spiral pattern. Once he's returned to normal, this no longer applies.
- Mega Manning: His red-feather power allows him to to absorb the powers of other people and use them for himself. However, doing so runs the risk of him losing control and becoming a berserker killing machine, or being killed by his own power. Culminates when he is forced to steal hundreds by his father, Sohaku, and becomes the True Warrior Susano'o, continuing to absorb powers until his final battle with Masataka; at that point he has almost 3700 powers under his control.
- Momma's Boy: Messing with his mother brings out the Dragon within - literally.
- The Napoleon: Judging by this cover, he's only about 150 cm tall (4'9) not counting his hair. Gets Lampshaded by some of Asshat's groupies, who refer to him as "shorty". In his defense though, he is slightly taller than that particular picture would imply, as he's officially listed as 165 cm (5'4).
- No Guy Wants to Be Chased: He doesn't seem to enojy Aya's crush for him.
- No-Holds-Barred Beatdown: Receives this from Masataka in the first serious fight the series presented.
- Physical God: As the True Warrior Susano'o. Complete with Power Makes Your Hair Grow.
- Red Oni, Blue Oni: Is the red oni to both Bob and Masataka, though he does show a more introspective side to his personality at times, particularly concerning his mother and the hardships she's had to go through.
- Replacement Love Interest: Aya thinks he is becoming this to her big sister. It doesn't help that Maya is an absolute Master of the Mixed Message.
- Super Mode: His Exorcist form, which causes his hair to turn black and fall straight down; in this state he is capable of using his natural ability of generating electricity as long as he touches the earth, in addition to the powers he's stolen.
- Super-Powered Evil Side / With Great Power Comes Great Insanity: Of the Body Snatcher variety.
- Will They or Won't They?: With Aya Natsume. The manga does shows them becoming closer friends and they later develop a Psychic Link telling them if the other is in danger. However, nothing develops romantically, even by the manga's end; may be in part because of Souichiro's feelings for Maya.
Souichiro's friend, who is of African descent. He and Souichiro first met and became friends in elementary school. Naturally athletic, he fights using the Brazilian fighting style capoeira. Because of his ancestry, when he first arrived at Todo, some addressed him as "The Foreigner". He is the conservative one of the pair, and unlike Souichiro, he does not let his rage overtake him, most of the time.
Tropes associated with Bob:
- Bash Brothers: Early on, with Souichiro.
- Black Best Friend: His characterization to begin with is quite flat, but the manga goes some way to develop him in later chapters, highlighting his feelings about his inability to keep pace with Souichiro and the other members of the Juuken Club.
- Cool Bike: One of his prized possessions, such that he gets incredibly pissed off when it gets wrecked by Ryuuzaki.
- Dance Battler: Practices Capoeira and uses rhythm to predict his opponents' moves.
- Delinquent: Before the beginning of the story, along with Soichiro.
- Gag Penis/Biggus Dickus: Becomes a Running Gag after a while.
- Huge Guy, Tiny Girl: With Chiaki
- I'm a Man; I Can't Help It: Asshat's Bodyguard Babes, still reeling from an earlier 'demonstration', challenge him to a '4-vs-1 match', and then start to strip. His response?Bob: "Don't tell Chiaki about this, heh." *wipes the drool*
- Lovable Sex Maniac: He's more lowkey about his love of sex than his girlfriend, but as mentioned, he has a pretty healthy sex life to put it mildly.
- Morality Chain: Chiaki is this for him. One of the few couples in the series to be depicted as happy with no major tension. Eventually escalates to Happily Married and Babies Ever After.
- Roaring Rampageof Revenge: Against Ryuuzaki for destroying his bike and raping Chiaki. It doesn't work.
- He eventually does get him back, though in a more comical but still violent way.
- Shipper on Deck: Ships Aya X Souichiro.
- The Straight Man: Much more level headed than Souichiro and is the first to call him out for being an idiot, acting as the other blue oni to Souichiro's red oni.
- The Executive Club Wants You: Mitsuomi makes no attempt to hide the fact that he would love nothing more than to take Bob under his wing and train him personally since Maya is so set on Souichiro and can't train Bob properly anyway. Bob still refuses.
- World's Strongest Man: Mitsuomi thinks Bob has the potential to become this.
- Your Cheating Heart: Has sex with four girls at at time at one point, and he even makes sure to tell Souichiro not to tell Chiaki beforehand.
The president of the Executive Council and Todo Academy's top fighter. He is Masataka's brother and is seemingly displeased with his brother's choice of comrades, presumably because of the history between himself and Maya Natsume. He was at one time a friend of Maya's brother, Shin Natsume.
Tropes associated with Mitsuomi:
- Aloof Older Brother: To Masataka. Turns out to be a Jerkass Façade as Mitsuomi truly cares for his brother and threatening Masataka is the easiest way to piss him off.
- Authority Equals Asskicking: And how! He could probably defeat the whole Council (minus Bunshichi) by himself, if he wanted to.
- Berserk Button: Don't threaten Masataka around him. No, seriously, don't.
- Big Ol' Eyebrows: With FORKED ends!
- Brought Down to Normal: In the aftermath of his battle with Susano'o-Souichiro and Masataka, a doctor says that his condition has stabilized, meaning that he doesn't have to worry about his heart rate increasing in or out of battle. This is most likely due to the blow to the chest he took from Souichiro during the fight.
- Calling the Old Man Out: Done in epic fashion as seen through episode flashbacks, culminating in Mitsuomi's ascent to leadership of the Takayanagi clan.
- Deadly Upgrade/Disability Superpower: Mitsuomi's heart rate is constantly elevated above normal thanks to an attack that he took from Shin when he was younger. While the increased circulation improves his strength and ki flow, he can only fight at full strength for about three minutes before his heart can't take the extra strain. On top of that, his heart rate continues to slowly increase even when he's not exerting himself, meaning that he will eventually die from heart failure.
- Empowered Badass Normal: After Shin nearly killed him by blasting his heart with ki, Mitsuomi can boost his own metabolism and heart rate. This is how he went from "fairly strong fighter with very good potential" to "best fighter ever".
- Fashion-Victim Villain - Invoked: Mitsuomi has without a doubt the worst sense of style to ever... "grace" this earth. He thinks his outfits look awesome when everybody else insults them. Lampshaded by Masataka when Mitsuomi wants him to wear battle-clothes passed down through the Takayanagi family. These clothes are little better than the clothes Mitsuomi wears, and Masataka wonders if a bad sense of style is hereditary.
- Friendly Enemy/Enemy Mine: During the second half of the story, he frequently teams up with the Juuken Club despite the fact that he is nominally opposed to them and to Maya. Bonus points because he grumbles about it. Maya doesn't buy it for a second.
- Handicapped Badass: He does these things and manages to survive a fight with Susano'o-Souichiro despite the Deadly Upgrade explained below.
- Heart Broken Badass: He and Maya refuse to acknowledge their lingering feelings for one another, causing them both some heartbreak and increasing their mutual antagonism.
- I Did What I Had to Do: Since Shin did indicate that he wanted Mitsuomi to kill him, he views his role in Shin's death as this. He doesn't use it as an excuse for his actions, though.
- Jerkass: Certainly comes across this way, expecially towards Masataka.
- Jerkass Façade: It becomes increasingly obvious that he cares for his little brother, and that he constantly tried to push him away to keep him out of the brutal martial arts world of Tenjho Tenge and the war that was about to start.
- Took a Level in Jerkass/Took a Level in Badass: During the flashback. While he was already a strong fighter, his final battle with Shin required him to take it to a new level; however, he began to develop his colder personality immediately afterwards.
- Made of Iron: He got smashed by a high-speed motorbike and then set on fire, and he ended up no worse for it.
- Used to Be a Sweet Kid: His personality in the first set of flashbacks (manga volumes 4-7) was remarkably like Masataka's.
- Would Hit a Girl: And toss her out the window from five stories high at that. In his defense though, Inue ''really'' had it coming.
- Your Cheating Heart: Had no problems sleeping with Mana, despite knowing she was only manipulating him as a means to an end.
A third-year student, as well as the vice-president of the Executive Council. Not only is she Mitsuomi's second-in-command, but she also harbors a deep respect and love for him. Because of Mitsuomi's lingering feelings for Maya, Emi sees Maya as someone she must defeat. Being a member of the rich Isuzu family, she works the family's traditional job as the Takayanagi family's inner guard, and is skilled enough with knives to bear the nickname "The Black Knife". Her beautiful appearance is a result ofher family's body fat contortion technique, which makes her appear a lot skinnier than she actually is.
Tropes associated with Emi:
- Action Girl: She is Maya's rival, after all.
- Body Guard Crush: She has deep love and respect for Mitsuomi, being one of the few people aware of his heart condition.
- Determinator: Emi's an odd example in that she'll often pull out of a fight if things get rough, but if she's wounded, she'll force herself to stay conscious in order to maintain her disguised appearance.
- The Dragon: To Mitsuomi.
- Fan Disservice: When Maya defeats her, she cannot keep her fat folded together and she reverts to normal form, her damaged clothing becoming even more so in the process.
- Fiery Red Head: Her hair seems more pink in the anime, but her behavior fits the trope.
- Hair Antennae: Has two strands of hair that stick up from the top of her head.
- Hair Intakes: The two "cat ears" that are part of her hairdo.
- Hot Teacher: In the epilogue, she starts working as a part-time teacher at Toudou Academy.
- Hyperspace Arsenal: Appears to have one, but in actuality, she stores her knives in the folds of her fat, making it look like she's pulling knives from thin air while her technique is in use.
- Knife Nut: Her talent with throwing knives has earned her the nickname "The Black Knife".
- Number Two: Mitsuomi's. She often keeps other members of the Council in line.
- Ojou Ringlets: She has five large ringlets. There are the three in the back and two that frame the sides of her face. She's part of a wealthy clan whose job it is to protect the Takayanagi family.
- The Rival: Sees Maya Natsume as this, due to Mitsuomi's lingering feelings for her. She does gain a sort of respect for Maya after the bowling alley fight.
A twenty-year-old senior of Todo Academy and close friend of Shin and Mitsuomi. He is the advisor, essentially their strategist, of the Executive Council. He never does anything however, and insists he is a member in name only. Different from all the other characters, Bunshichi does not see any sense in training to be stronger than someone else and avoids entering into fights. Bunshichi is overwhelmingly powerful and is the amongst the strongest characters in the series, despite his distaste for fighting.
Tropes associated with Bunshichi:
- Badass Normal: He has absolutely no powers, no martial arts training, or utilization of any discipline. At best, he uses his "ki" to just increase his muscle size. Doesn't stop him from being unmatched by almost every other character in the series.
- Characterization Marches On: When Bunshichi first appears, he demonstrates a skill akin to super-hearing, able to tell what's going on with the fight inside the bowling alley while he's standing on the roof. This skill is never used or mentioned again. This may in fact have been a leftover character element from Oh Great!'s original draft of the series, wherein Bunschichi was the "Old Man" who had mastered every style of martial arts and several other esoteric skills. Thus, his first appearance may have been before the author settled on him being a pure brawler with no formal training.
- Determinator: Despite the fact that Shin knocked him into a car and stabbed Reiki into his legs repeatedly, Bunshichi was still able to get up, walk and pummel Shin into the dust, knocking him out cold.
- Did You Just Punch Out Cthulhu?: He's about the only person who can take on Shin at his craziest.
- Gag Penis/Biggus Dickus: Though whether it matches Bob's or not is not a question to be pondered.
- Good Old Fisticuffs: His fighting style is best described as "street brawling", simply using his sheer brute force to win fights.
- Let's Get Dangerous!: His most egregious example of this is probably when he spends several pages running away from a car trying to hit him and then, finding himself cornered both physicalli and emotionally, he turns and punches the car away.
- Lovable Sex Maniac: Often threatens to rape people, but never really means it, and likes pretty girls; he tends to call large breasts "deadly weapons".
- Obfuscating Stupidity/Brilliant, but Lazy: Regarding his fighting skills and general personality. Once he takes a fight seriously, he can be incredibly deadly, routinely besting most challengers that come his way.
- Red Baron: Has three nicknames: Exorcist Tawara/God of Fighting/Double Impact Tawara. He lives up to all three of them.
- Smoking Is Cool: Loves his cigs, so much so that he smokes one even after getting killed, revived to bare consciousness, and while strapped to a hospital gurney, claiming that he'll die without it.
- The Juggernaut: Despite having virtually no martial arts training, his strength is so monstrous that he is able to hold his own against Todo Academy's best fighters even while holding back. While in his "rage" state, he is practically unstoppable.
- Unskilled, but Strong: Naturally talented and powerful, but with no known formal training.
- Younger Than He Looks: Is apparently around twenty years old, and is still a senior due to the injuries he sustained during Shin's last fight, which forced him to take time off from school.
Third-year student and leader of the 3rd division group of the Executive Council. He proclaims himself "the last samurai", following bushido. Being a gentleman, he despises cowardly ways of fighting. His style of fighting is using a hybrid bō that can turn into a sansetsukon. When fighting, he is very violent, but he does not take pleasure in hurting his enemies. As a samurai, he seeks for strong opponents and feels honored for fighting against them. He is currently ranked 9th of the Todo Academy's strongest fighters and is the reserve of the Executive Council on the Election Tournament.
Tropes associated with Tagami:
- Character Tic: Has a noticeable stutter whenever he speaks (or thinks!).
- Everything's Better with Samurai: Despite living in the modern era, he is a samurai to his bones.
- Informed Ability: He's said to be one of the 10 strongest people at the school. Apparently, he only fights against the top 9.
- Honor Before Reason: The real drive of his character - he's probably the single most honorable person at the school.
- No Holds Barred Beat Down: Delivered to him by Aya after her Dragon's Eye activates.
- Spam Attack: Attacks rapid fire with his staff, particularly effective because of his reach and the close quarters in which he was fighting.
- Speech Impediment: He often stutters, as appropriate for his timid personality.
- The Worf Effect: Apparently, his character's biggest contribution to the series is routinely getting his ass kicked to hype up the next big enemy.
Third-year student and the leader of Mitsuomi's guard, he does not seem to care very much about Mitsuomi's safety, which normally causes Emi to get upset at him. Kagurazaka have a very effeminate look and, for this, is called transvestite by Isuzu. Little of his abilities were shown, and he only had an unfinished fight against Masataka, but his stats on Kurei's data apparently puts him on the same level as Isuzu.
Tropes Associated with Kagurazaka:
- Arrogant Kung-Fu Guy: Being one of the strongest fighters seems to have made him a bit of a Jerk Ass.
- Bishōnen: Such that Viewer Gender Confusion is rampant upon first seeing him.
- Curb-Stomp Battle: Gets his ass kicked by Masataka.
- Hidden Depths: Despite his Arrogant Kung-Fu Guy attitude, it's explained that he went through self-imposed Training from Hell to reach his level of skill.
- Informed Ability: Is said to be about as strong as Isuzu.
- Jerkass: He really likes to taunt his opponents while he's winning.
Koji Sagara / "Saga Mask"
Second-year student and the founder of the Pro Wrestling group, which became a subsidiary of the Executive Council. He joined the Executive Council only after Mitsuomi promised his startup group would not be destroyed, would get a place to practice, and have a budget. He has an alternate personality named Saga Mask, which according to him, is the most brutal enforcer of the school. When playing the part of Saga Mask, he will not take off his mask even if it will prevent trouble with others (including the police), because it is part of his beliefs.
Tropes associated with Sagara:
- Boring, but Practical: His "Muscle Bomb" technique is probably the lamest, most boring move in the series. Yet, it's useful enough for even Mitsuomi to learn and use it.
- The Big Guy: His role in the Council.
- Calling Your Attacks: This series is utterly prone to them, but when your attacks consist of dramatically shouting "German…SUUUPLEX!", it's worth a mention.
- Cool Mask: Wears a wrestling mask when fighting as he believes it strengthens his power.
- Curb-Stomp Battle / The Worf Effect: Souichiro utterly destroys him in their second encounter.
- Giant Mook: After not being able to catch up to main characters, this is basically his role.
- Honor Before Reason: Allows Souichiro to tap-out via rope despite the fact that they aren't in a wrestling ring.
- Testosterone Poisoning: He really likes being manly.
- Theme Music Power-Up: The ''Terminator theme at that!
- Walking Shirtless Scene: He always fights in his wrestler outfit.
A second-year student, fire-elemental user, and an enforcer of the Executive Council. He was assigned to punish Souichiro and Bob for their actions at school. He accomplished this by setting Bob's treasured motorcycle on fire, sexually assaulting Chiaki, and pummeling Souichiro and Bob when they came to save her. Once Souichiro and Bob joined the Juken Club, Maya Natsume pays him a visit, seeking to overturn Souichiro and Bob's expulsion. Ryuuzaki engages Maya in a fight, but loses. Afterwards he is attacked and seriously injured by Sagara, as punishment for failing his mission. While in the hospital recovering from his injuries, Souichiro and Bob come to pay him a visit and deliver their own vengeance.
Tropes associated with Ryuuzaki:
- Jerk Ass: He's the only character from the Council who has no excuse whatsoever for his actions.
- No-Holds-Barred Beatdown: Suffers from this twice as punishment for what he does to Chiaki. The second beatdown happens while he's in the hospital, recovering from the first.
- Rape as Drama: He rapes Chiaki as a way to provoke the Jyuken Club into a war with the Council.
- Playing with Fire: Though it's called a cheap trick by other characters, he is capable of this. Maya still kicks his ass seven ways to Sunday with her bare hands and a school tie.
'Mitsuiro Tokuan Shojo
The current head of the Shōjō family and Hirohiko’s teammate. She only recently arrived at Todo Academy and she has appeared to have aligned herself with the Executive Council. It was hinted her real reason for coming was to finish her ancestor’s work. Much like her ancestor before her, she seem to have the ability to copy people’s appearance and physical attributes without their drawbacks, such as Mitsuomi's drawback of only able to fight effectively for three minutes.
Tropes associated with Shojo:
- Body Double: Her Red Feather power allows her to completely copy the appearance, memories, personality, and battle abilities of anyone without any drawbacks. Mitsuomi has her use this ability to take on his form for the upcoming election tournament.
- Dark Action Girl: She is very strong, but can be quite nasty.
- Emotionless Girl: A sort of side-effect of her power. Spending your life copying other people apparently is not good for your emotional health.
- Friendly Enemy: In the end, her true goal is to stop Sohaku's plan.
- Ms. Fanservice: After copying Aya's appearance, she gropes herself in wonder.
- Nice Hat
- Shapeshifting: Much like her ancestor, she's able to copy people's appearances and abilities.
Hirohiko Myouun Kabane
The current head of the Kabane family and Mitsuiro’s teammate. He only recently arrived at Todo Academy and he has appeared to have aligned himself with the Executive Council. It was hinted his real reason for coming was to finish his ancestor’s work. He seems to be very informed about the strengths and weaknesses of others' powers. His power is the same as his ancestor’s, he can materialize large blades seemingly out of nowhere.
Tropes associated with Kabane:
- The Ace: Arguably, he is the strongest and most skilled of all the Red Feathers. Aya observes that although he has fewer techniques, the amount of ki he is able to exert matches, or even exceeds that of Tetsuhito.
- Attack Drone: The Kabane Blades, materialized through Hirohiko's acupuncture needles and manipulated via chains of scent behave in this manner.
- Beware the Nice Ones: He's normally a Nice Guy, but he has no issues with trying to kill Soichiro to stop Sohaku's plan.
- BFS: He can summon several of these and control them with his power.
- Blind Seer: He can use his ki and his nose to perceive things better than most people.
- Eyes Always Shut: As appropriate for a Blind Seer.
- Field of Blades: He can turn dust into a storm of swords.
- Friendly Enemy: He fights against Aya and Soichiro, but his goal is stopping the Big Bad.
- Handicapped Badass: His blindness doesn't hinder him too much.
- Powered Armor: He can create an armor with his power too.
The first and only head of the Kago family, the true leader of F, and the father of Souichiro Nagi. His power can infuse ki back into a lifeless body, reviving it from the dead. Through this means, Sōhaku seemingly "defies" death and has been alive for centuries. He also has the ability to store his consciousness in his right eye, allowing his soul to migrate to another body, when the eye is inserted into someone else's body. He has a habit of using people for his own means and getting rid of them when they are no longer useful to him. He has always been in conflict with the other founding families and is often responsible for many of their deaths.
Tropes associated with Sohaku:
- Badass in a Nice Suit: He likes doing villainous things with style.
- Big Bad: His plan to become a Physical God is the source of most problems in the series.
- Big Bad Dad: To Souichiro.
- Delinquent: Not in the present, but he certainly dressed like one during his marriage to Makiko, complete with Goggles Do Nothing.
- Grand Theft Me: He wants Souichiro to be powered up with Red Feather powers so that he can eventually possess his body. He succeeds (though he loses control later), turning Souichiro into a superpowered monster until the final confrontation.
- Luke, I Am Your Father: He was Makiko's husband and Soichiro's dad.
- Manipulative Bastard: His marriage with Makiko was at least partly him manipulating her into helping with his plan.
- Man in White: He seems to consider himself as a semi-divine entity.
- Necromancer: Sohaku's Red Feather power allows him to recharge the chakras of ruined bodies, enabling him to give life to the recently dead (although by the definition used in the series, these people aren't fully dead, and it is explicitly stated that even Sohaku can't revive someone who IS really dead). This same power is also what enables him to live for millennia without aging a day and is also what allows him to keep his favorite servants around him for centuries as well.
- Sharp-Dressed Man: See Badass in a Nice Suit above.
- Soul Jar: Sohaku's eyes can act as this, leading to Souichirou losing one of his own as part of the Grand Theft Me plot above.
- Unholy Matrimony: He once married Makiko and had a son, Soichiro, with her.
- White Hair, Black Heart: He has probably the blackest heart in the whole series.
Noriko Shindayu Inue
A Shinto priestess and one of Sōhaku's most trusted subordinates. Her power, the Dragon Roar, allows her to control another’s body, but the owner of the body can still make subconscious movements. She has lived for centuries, due to Sōhaku’s power to defy death. She is often entrusted with Sōhaku’s experiments and seems to have a very possessive love (or adoration) towards him. She is also the one that is delegated to obtain a new body for him if/when his old one is destroyed.
Tropes associated with Inue:
- Arrogant Kung Fu Bitch: She's extremely confident in her power and likes to show it off to her victims.
- Beauty Is Never Tarnished - Averted: Mitsuomi punches her so hard that some of her teeth are knocked out, and later on she bites off part of her tongue when Souichiro attacks her and takes her powers.
- Brainwashed and Crazy: Her power can inflict this on people.
- Bullying a Dragon: She insults Mitsuomi and threatens Masataka while pouring a cup of tea on Mitsuomi's head. As a result, Mitsuomi punches her face in and tosses her out of a fifth floor window. Great job, Inue, you just had to piss off the one person immune to your powers.
- Co-Dragons: With Kagiroi to Sohaku. While he handles killing people, she typically acts as the extension of Sohaku's will by controlling others and working as an ambassador of sorts.
- Manipulative Bitch: Her power is this weaponized, and she really likes using it.
- Miko: She acts like one to Sohaku.
- Really 700 Years Old: Has been kept alive and healthy for years thanks to Sohaku's power.
- Smug Snake: All she really has going for her is her ability to control people. When that doesn't work, she loses it.
The current star-fighter of F and head of the Kagiroi family, he is one of Sohaku’s most trusted subordinates.
Tropes associated with Tetsuhito:
- Achilles' Heel:
- Because of his iron hard skin he's never experienced pain, and therefore inflicting even a minor injury on him will cause a big reaction.
- Also, removing or damaging his left eye will make him lose control of all his powers.
- Arrogant Kung-Fu Guy: Having been an almost undefeatable warrior from his birth, he doesn't seem to value other people's lives at all.
- Awesomeness by Analysis: He's smarter than he looks and can easily see through many techniques.
- Co-Dragons: With Inue to Sohaku. In some ways he fits The Brute archetype what with being powerful and, despite his intelligence, only really sent in to break things, but he's too high up the totem pole for that, and he's the only one Sohaku really trusts to succeed in killing powerful enemies.
- Combat Pragmatist: Makes use of high-tech "hologram bombs" which project images of himself and explode upon someone coming in contact with them.
- Cruel and Unusual Death: Seems to be a magnet for these.
- Tetsuhito was born after his mother was forced by Sohaku to swallow a bomb which blew off her upper torso, while he was still in the womb.
- He also killed numerous members of the Mawari branch family by rolling them into round balls and squeezing out all of their bodily fluids until only a shrivelled up husk remained.
- Maya bisects him along the arm as his punch collided with the true blade of the Reiki.
- Eye Scream: Maya graphically stabbed his transplanted eye...with a tie!
- Genius Bruiser: Despite his overwhelming strength and powers, he can fight smart if he needs it.
- Hero Killer: He kills Maya.
- Lightning Bruiser: He's strong, fast, and because of his iron skin, almost invincible.
- Made of Iron: The women of the Kagiroi family drink iron sand during pregnancy which gives members of that family skin and blood that is freakishly strong. It is from this that they get the Iron Fist technique.
- Really 700 Years Old: Sohaku's experiments on him have allowed him to live for hundreds of years. He also had Makiko's eye transplanted into him after Sohaku deemed Makiko too weak to be a "true warrior", giving him the powers she absorbed.
- Unskilled, but Strong: He tends to rely on the bevy of supernatural powers he possesses in battle. When those fail him, he has his inherent Kagiroi Family toughness to fall back on, which works both defensively and offensively, as Maya notes that, even if he doesn't use technique, getting hit by one of Tetsuhito's blows is like getting clocked with a chunk of solid iron.
- Would Hit a Girl: As Maya found out the hard way. Pun intended.
The current head of the Kabuto family. He acted as Sōhaku’s assistant and supervised the operation to retrieve the computer chip at Enmi's shrine. When the operation failed, he agreed to fight with Souichiro to redeem himself, but since the fight was never shown, his power was never revealed. After his defeat he made a deal with Souichiro that if Souichiro freed him, he would help him escape Sohaku’s compound. He was last seen meeting Tessen, who immediately killed him.
Tropes associated with Kabuto:
- Arrogant Kung-Fu Guy: Though his arrogance gets broken pretty quickly.
- Badass in a Nice Suit: He acts and talks like a businessman, despite being a strong warrior.
- The Brute: His only real ability is physical strength, he's a somewhat lower-ranking member of F, and he isn't all that bright.
- Cool Shades: Until they get broken during one of his Worfications.
- Chronic Backstabbing Disorder: First betrays the 12 Founding families, then betrays Sohaku. Ishiyumi properly ventilates him. And he still has time and energy to switch over to become Mitsuomi's assistant.
- Curbstomp Battle: While never shown, it's implied he got his ass handed to him by Souichiro. He also never stood a chance against Ishiyumi.
- Heel–Face Revolving Door: Though he mostly gets thrown through the door rather than using it willingly.
- Sharp-Dressed Man: He really likes to appear smarter than he is.
- Smug Snake: He isn't nearly as good at playing both sides as he thinks he is.
- You Have Outlived Your Usefulness: Tired of his Chronic Backstabbing Disorder and scheming, Ishiyumi swiss-cheeses him.
Jushi Mataza Tsumuji
The illegitimate son of Yorihira Mataza Tsumuji, the former leader of the Tsumuji family, and a member of the Shukyou family (a branch of the Kabane family, one of the red feather families of the Flying Phoenix). Because of his mother's being poor to the point of working as a prostitute and his red feather blood, Jushi was despised by his half-brother, the legitimate heir of the Tsumuji family, Yorimasa Mataza Tsumuji, who constantly assaulted and humiliated him. One day, an enraged Jushi tried to kill his brother, only being stopped by his father, who broke his spear. A large fragment of the spear penetrated into Jushi's right eye and was stuck into his brain. This activated the power of the Shukyou family, the Dragon Claw, that was instantly used to slice Yorimasa's right leg. Years later, Jushi grew to become the sadistic leader of the Tsumuji family, after a coup d'état on his father.
Tropes associated with Mataza:
- Arrogant Kung-Fu Guy: He's so confident in his power that he usually fights as an Hollywood Cyborg to avoid using it.
- Bishōnen: He has a pretty face, though he usually keeps it hidden.
- Jerk Ass: Despite his Freudian Excuse, he's probably one of the most evil characters in the series. He and his troops engage in child murder, torture and gang-rape in a single arc.
- Hollywood Cyborg: Tries to avoid using his power whenever he can. This is why he makes use of eight mechanical arms and multiple spears in battle.
- Multi-Armed and Dangerous: Uses robotic arms to wield eight spears simultaneously.
- No-Holds-Barred Beatdown: After awaking Soichiro's Superpowered Evil Side, he gets on the receiving end of one of those. He's still satisfied, though, since corrupting Soichiro's mind counts as a victory for him.
- Torture Technician: Arguably the best in the series. It's implied his half-brother spent about ten years being brutally tortured.
The head of the Ishiyumi family, Tessen proved to be one of Mitsuomi's most loyal subordinates. Tessen normally keeps a level-head, and good humor about himself. However, his resolve to place Mitsuomi in power makes him a fearsome combatant. As he refers to Emi Izumi and Shirō Tagami to Mitsuomi's Sword & Shield, Tessen analogizes himself to an arrow, who will stop at nothing until he pierces his prey. The only member of F who leans much more so towards Mitsuomi than F itself.
Tropes associated with Ishiyumi:
- Ax-Crazy: After losing his powers to Souichiro, he temporarily turns into something of a sociopath. He gets better after a What the Hell, Hero? moment with Mitsuomi.
- Cherry Tapping: He massively held back during his first fight against Souichiro.
- Mr. Fanservice: He usually fights shirtless and is quite ripped.
- Fan Boy: He deeply admires Mitsuomi.
- Friendly Enemy: He and Souichiro have a lot in common. They both acknowledge that if things took a turn differently, they'd be the best of friends.
- Undying Loyalty: To Mitsuomi. This snaps him out of his Ax-Crazy phase.
- What the Hell, Hero?: Temporarily goes a wee bit crazy after Souichiro accidentally snatches away his Dragon's Gate. Mitsuomi firmly snaps him out of it.
The current head of the Mawari family and was a member of F; her specialty is fencing. She was initially controlled by one of Sōhaku’s jutsu, maintained by a necklace she wore; it reduced the pain she felt in battle and also made her believe that she was in love with Sōhaku, even though he was the one who killed her parents. She was sent to retrieve an important computer chip from the Juken Club, and relentlessly attacked them until Aya destroyed the amulet. Afterwards, she is proven to be a caring middle school student that is willing to help the Juken club in any way. During her time with the Juken Club, she takes a liking to Masataka, though he is painfully unaware of her affections.
Tropes associated with Madoka:
- The Ace: Is said to be the single best swordsman in the entire series in terms of skill.
- Action Girl: She manages to defeat both Bob and Emi Isuzu.
- Clothing Damage: She cuts off the hem of her dress to fight better against Bob, Masataka, and Isuzu.
- Dual Wielding: Is more than capable of this, especially with the S.A.B.B. Acetylene Gas Blades—effectively lightsabers made of FIRE, and a pair of trench knives, similar to Asuma Sarutobi's.
- Hopeless Suitor: Towards Masataka after their fight.
- Implausible Fencing Powers: When it comes to living up to the family name in terms of sword expertise she doesn't disappoint, being more than an even match for Bob in their fight. Maya even goes so far as to say that Madoka easily outstrips her and Aya in the use of a blade, and is honored to watch a demonstration of Madoka's techniques in person.
- Impossibly Cool Weapon: S.A.B.B. swords aside, she also has a Whip Sword on hand and doesn't hesitate to use it.
The father of Masataka and Mitsuomi. Was the former head of the Takayanagi family until Mitsuomi took over. Was best friends with Kaima Natsume.
- The Atoner: Shows shades of this when he explains his reasoning for training Souichiro.
- Badass Grandpa: Saves a young secretary girl from gangsters without even breaking a sweat, going so far as to steal a bike to catch up to them.
- Calling the Old Man Out: Mitsuomi did this by forcibly overthrowing him as head of the family.
- Dirty Old Man: Seen in the episode where Masataka lets Aya stay with him for the night and his comments to Shin regarding his relationship with Mana.
- Disc-One Final Boss: He's the mastermind behind the events of the first flashback... but he's still a pawn for the true Big Bad.
- Old Master: Makes up for his age with his experience, and did at one point teach Masataka and Mitsuomi how to fight.
- Pet the Dog: Does genuinely care for his sons, despite his general bastardry towards them sometimes; he was outraged when Shin nearly killed Mitsuomi in combat, and seems to have a good relationship with Masataka.
- Scary Shiny Glasses: During his most villainous moments.
- Well-Intentioned Extremist/Knight Templar Parent: Attempted to use Shin as a figurehead for his ideal "True Warrior" to fight, and also to try and stop the threat of Shin in general.
- Artificial Limbs: Gains them after losing her only remaining arm to save Souichiro.
- Demon Slayer: As is her family's traditional duty.
- Eye Patch Of Power: Conceals a very nasty mass of centipede-shaped scar tissue.
- Heroic Sacrifice: First she gives up her one remaining arm in order to save Souichiro from being obliterated by his out of control Dragon's Fist ki. Then, she ultimately gives up her life in order to fully revive Maya.
- Mega Manning: The Nagi family possess the power of the Dragon Fist, so she can steal powers just like Souichiro can. The only exception for both of them is the Dragon's Eyes of the Natsume family, not because they couldn't be absorbed but because neither Makiko nor Souichiro faced a holder of the Dragon Eyes in combat.
- Morality Chain: Souichiro is very protective of her, intending to drop out of school later and take over the running of the family business for her.
- Ugly Guy, Hot Wife: Played with. While she's naturally beautiful, the horrible scars marring her face make for a strange inversion of the trope since Sohaku is now more attractive than her.
- Unholy Matrimony: She and Sohaku were once married according to her and they conceived a son together— Souichiro. However Sohaku only saw her as a test subject for his experiments and when he deemed her too weak to "control her own dragon" he transferred all the powers she had absorbed from the 12 Founding Families into her left eye, which he then removed and had transplanted into Tetsuhito. When she tried to follow Sohaku after he abandoned her, he cut off her left arm.
- Rape as Drama: Courtesy to Ryuuzaki to lure Bob and Soichiro.
- Bi the Way: The infamous Aya X Chiaki pool scene.
- Ms Fan Service: Distinguished from all the other Ms Fanservices in that this is basically her only role in the story.
- Lovable Sex Maniac: Towards Bob.
- The Pollyanna: Subverted, she is not innocent but no less cheerful. Ryuuzaki rapes her. Bob and Soichiro attempts to rescue her. Ryuuzaki fends off those two. Chiaki comforts them the defeated fighters instead. She doesn't angst too much afterward.
- Satellite Character: No real bearing to the plot whatsoever.
- Becoming the Mask: Initially hated being made to act as Shin's girlfriend but grew to fall in love with him.
- Brainy Brunette: She has no fighting skills but can still be quite menacing with her acupuncture.
- Combat Medic: Can throw her acupuncture needles like weapons and is a member of the school's Medical Club. She treats Shin's opponents after he wounds them, saving the lives of many in the process.
- Heel–Face Turn/The Mole: An unusual example both the mole and the 'mark' are aware of each other's roles and maintain the facade. Subverted in that she starts falling for said 'mark' over the course of the relationship.
- Meganekko: Her big glasses complement her Brainy Brunette personality.
- Stoic Spectacles: She has hidden her true feeling for quite a while.
- Through His Stomach: Laughably averted in a hospital scene where Shin, recuperating from his injuries refuses to eat her bento. She does not take it well.
- Together in Death: She takes Shin's ki attack meant for Mitsuomi. As the blast tears through her body, she confesses her love for Shin even though she knows he doesn't love her back. After her sacrifice, Shin takes one of her acupuncture needles and with her help commits suicide.
- The Vamp: To Mitsuomi, in order to further Dogen's plans.
- Unwanted Spouse: She thinks that Shin views her as this compared to Maya; in fact her opinion on the relationship between the two Natsumes is more of lovers than siblings-at least on Shin's side.
A ceremonial nodachi that is the heirloom of the Natsume family. Maya is its current guardian, although she eventually intends to hand over possession to Aya when Aya comes of age. It is considered to be cursed by characters, as it amplifies the user's Dragon's Eye abilities, and was part of the reason why Shin became so dangerous.
- Ancestral Weapon: Has been passed down the Natsume family until it got into Maya's and Aya's hands.
- BFS: Obscenely long, probably matching Shin's height in terms of its length.
- Cool Sword: A lot of the story revolves around its power.
- Chekhov's Gun: Beyond its role in Shin's story, it becomes integral to killing Sohaku and destroying Susano'o; after its spirit form is stabbed into Sohaku's spiritual body, it eventually cuts him off from the power of Susano'o, making him vulnerable.
- Critical Existence Failure: After Maya has the power of Reiki added to her own, it turns into rust and scatters on the wind when Aya next draws it.
- Empathic Weapon: Of a sort. It contains the power and soul of Iyo Natsume, one of Maya and Aya's ancestors.
- Katanas Are Just Better: Averted, as a nodachi is not a katana, and is based on swords that actually predated the katana.
- Power Nullifier: It can be used as this.
- With Great Power Comes Great Insanity: Amplifies the user's powers, but if used at too young an age can drive the user insane.
Dogen Takayanagi's Deceptive Disciple. He beat Maya in a fight in order to humiliate her and enrage Shin, which worked all too well and got him beaten to a pulp by Shin. Though he planned to get his revenge on both Shin and Maya, Shin decided to preempt said vengeance by visiting him in the hospital and ripping off his face and ripping out his eyes.
- Arrogant Kung-Fu Guy: Very confident in his superiority to "Japanese monkeys". It doesn't end well.
- Handicapped Badass: His "triumphant" return when he faces off with Bunshichi and Masataka has swords for hands and a veil over his face. As the series goes, more emphasis is put on his increasing cyberization as he loses more and more limbs. His final appearance has him walking on prosthetic bladed hands, with a large wheel attached to his lower torso—the rest of him is simply gone.
- Smug Snake: He is actually quite strong, but he keeps biting more than he can chew and refusing to admit it.
- Staying Alive: He was for all intents and purposes dead until Sohaku revived him with the Flaming Dragon's Gate. Since then, he's been coming back for more and more punishment, and becoming less human along the way.
A member of one of the Kago branch families, serving under Sohaku.
- Combat Sadomasochist: Pleasures herself while watching Hirohiko Myooun Kabane and Aya fight.
- Knife Nut: Carries a razor on hand.
- Non Action Girl: Though she claims that the Jujitsu club captain has a weak hold, she gets incapacitated with one good punch and spits up the queen bug that coordinated her body controlling powers.
- Meat Puppet: Can control others with special insects and toughen them up; those controlled tend to lose finer control of themselves and act in very odd ways, having runny noses or drooling.
Yorihira Mataza Tsumuji
The former head of the Tsumuji family, before Jushi overthrew him.
- Badass Grandpa: He easily defeats several Mooks during the Mataza arc.
- Your Cheating Heart: Had an affair with a prostitute which led to Jushi being born. Due to Jushi being illegitimate, his older son Yorimasa hated him and felt that both Jushi and his mother were beneath him and the Tsumuji family.
Yorimasa Mataza Tsumuji
- Asshole Victim
- Heir to the Dojo: The reason why he and his younger half-brother do not get along.
- Jerk Ass: He constantly bullied his half-brother until he snapped.
- Sibling Rivalry
Aya Natsume (senior)
Maya and Aya's ancestor. Was a previous owner of Reiki.
- Younger Than They Look: She has the same ability as her descendant Maya to change appearance, but instead of transforming into a chibi version of herself to save her ki, she transforms into an adult version of herself.
- Improbable Age: Was head of the Nagi family at a very young age.
- Wise Beyond Their Years: He's the true leader of the group, and also the most level-headed one.
- Voiced by: Ryuzaburo Otomo (JP)
The father of Shin, Maya and Aya Natsume.
- Nice Job Breaking It, Hero!: See below.
- Parental Abandonment: After Maya unwittingly allowed Shin to touch Reiki, he decided to lock Shin up so that he wouldn't lose control over his powers and to keep him away from Aya, in fear of accidentally awakening her own Dragon's Eye abilities. This backfired, as Shin grew more insane and obsessively attached to Maya as she was the only contact he had in the cellar, and since she was able to calm him down whenever he began to lose control.
The mother of Shin, Maya and Aya Natsume. Never appears in the anime and is only referred to in the manga in one of Aya's flashbacks.