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:
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.
Nice Job Breaking It, Hero: Her rebellion against Shin's group, Team KATANA, and disregard for her own safety, contributed to Shin's extreme 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.
Power Nullifier: It is eventually revealed that Maya possesses the Amaterasu Dragon's Gate, which cancels out "Red Feather" powers; that 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.
"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?"
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:
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.
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:
Kagesada "Asshat" SuganoA 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: Don't let his cowardice fool you - he WILL kick your ass upside down!
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.
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. Subverted later, though, when it's revealed he trains every day with a brutal training regimen in order to be as badass as he is, meaning this is really Obfuscating Stupidity.
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.
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:
Artificial Limbs: Had to get his hand replaced after Souichiro-turned-Susano'o cuts it off in the big showdown.
Curb-Stomp Battle: After several volumes of fading into the background, Masataka comes back with a vengeance, utterly crushing Madoka and later a reanimated Fu Chi'en and handed 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.
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).
Unrequited Crush: Towards Aya. Madoka Mawari has a crush on him, of which he is blissfully unaware.
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:
A self proclaimed hoodlum, and the heir of the Demon Exorcist family. A first-year student, he has been fighting his whole life because of being picked on, due to his lineage. 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 to the people he cares most about. His family has long been discriminated against from the lack of understanding by others, and the fact that their power can cause them to become extremely powerful and dangerous to society.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.
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.
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 it's always been Maya.
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.
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.
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.
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:
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: Is hinted at becoming such by Mitsuomi of all people from the first time he meets him. By manga's end, he is hailed as the strongest student at Todou Highschool ever.
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.
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 Masataka.
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, and on top of that, it continues to increase even when he's not exerting himself, meaning that he will eventually die from heart failure.
Fashion-Victim Villaininvoked: Mitsuomi without a doubt has the worst sense of style to ever... "grace" this earth. He thinks his outfits look awesome when everybody else insults them. It's 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: 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.
I Did What I Had to Do: Views his role in Shin's death as this, though he doesn't use it as an excuse for his actions. Since Shin did indicate that he wanted Mitsuomi to be the one to kill him, it makes sense that Mitsuomi would feel this way.
Jerkass: Certainly comes across this way, though he does have good intentions for Masataka and wants him to become strong.
Jerkass Façade: He constantly tried to push Masataka away in order to keep him out of the brutal martial arts world of Tenjho Tenge. However, it becomes increasingly obvious that he cares for his brother.
Took a Level in Jerkass/Took a Level in Badass: 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:
Badass: While she gets Worfed later on, one must remember that she still dislocated Maya's shoulder at the beginning of the series, even if she had to use a sneak attack.
Body Guard Crush: She has deep love and respect for Mitsuomi, being one of the few people aware of his heart condition.
The 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.
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: In many ways, which is part of the reason why he is so popular with the fanbase.
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.
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.
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!).
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:
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:
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:
'Mitsuiro Tokuan ShojoThe 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. Using this ability, Mitsuomi has her take on his form for the upcoming election tournament.
Shapeshifting: Much like her ancestor, she's able to copy people's appearances and abilities.
Tattooed Crook: Very unique tattoo on her face, but certainly not a crook.
Hirohiko Myouun KabaneThe 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.
Sohaku KagoThe 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:
Grand Theft Me: Wants Souichiro to be powered up with Red Feather powers so that he can eventually possess his body. Succeeds (though he loses control later), turning Souichiro into a superpowered monster until the final confrontation.
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.
Noriko Shindayu InueA 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:
Beauty Is Never Tarnished: Averted. In the manga, 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.
Bullying a Dragon: She insults Mitsuomi and threatens Masataka while pouring a cup of tea on Mitsuomi's head. As a result, he 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 Sōhaku. While he handles killing people, she typically acts as the extension of Sōhaku's will by controlling others and working as an ambassador of sorts.
Smug Snake: All she really has going for her is her ability to control people. When that doesn't work, she looses it.
Tetsuhito KagiroiThe current star-fighter of F and head of the Kagiroi family, he is one of Sōhaku’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. Removing or damaging his left eye will also force him to lose control of all his powers.
Co-Dragons: With Inue to Sōhaku. 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 Sōhaku really trusts to succeed in killing powerful enemies.
Combat Pragmatist: Is Genre Savvy enough to make use of high-tech "hologram bombs" which project images of himself, and upon someone coming into contact with the image, explode.
Eye Scream: Maya graphically stabbed his transplanted eye...with a tie!
Genre Savvy: He realizes that those who fight fair tend to end up dead quickly.
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.
Katsumi KabutoThe 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 Sōhaku’s compound. He was last seen meeting Tessen, who immediately killed him.Tropes associated with Kabuto:
Jushi Mataza TsumujiThe 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:
Tessen IshiyumiThe 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.
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.
Madoka MawariThe current head of the Mawari family and was a member of F; her specialty is fencing. She was under Sōhaku’s jutsu that was maintained through an amulet on her necklace. This jutsu 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 the computer chip from the Juken club. She proved to be very determined until the jutsu was broken when 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 the time with the Juken club, she has taken 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.
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.
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.
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.
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.
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 the ki attack directly from Shin 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, but because of 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.
Unaffiliated CharactersReikiA 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.
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.
Fu Chi'enDogen 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.
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.
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.
Nokimi MayutsuboA member of one of the Kago branch families, serving under Sohaku.
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.
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.
Mrs. NatsumeThe 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.