|Nicknames|| Morse (by Okegawa)|
Banchou [As Natsuo]
MafuMafu (by Ayabe)
Stalker Girl (by Ayabe's friends)
Coach (by Class 2) [as Natsuo]
|Height||155 cm (5'1")|
|Occupation|| 2nd Year High School Student|
Banchou of Higashi High (former)
Banchou of Midori Ga Oka High (former) [as Natsuo]
|School|| Higashi High (former)|
Midori Ga Oka Acadamy
|Affiliation|| Public Morals Club
Higashi High Gang (former)
|Club Position||Founding Member|
|First Appearance||Chapter 1|
Mafuyu has short brown (sometimes silver) hair. She has an average build and is usually shown to wear the Midori Ga Oka School uniform, consisting of a white short-sleeved shirt, and a knee high skirt, as well as a black blazer and tie. A common accessory for her is her chain necklace, a farewell gift from her gang friends at her previous school, Higashi Middle School. After Chapter 1, Mafuyu wears the necklace underneath her shirt.
However, in order to fulfill her tasks as a member of the club without revealing her abilities, she disguises herself as two 'shadow members'. The first persona, "Usa-chan Man" (Super-Bun in the official English translation of the manga by Viz Media), is simply Mafuyu wearing a pink rabbit mask with sparkly eyes to cover her face. More recently, Mafuyu has begun to tie her hair back into a ponytail so that she won't be exposed from behind, as per suggestion from Takaomi.
When disguised as Natsuo, Mafuyu crossdresses and wears a brown short-haired wig, Midori Ga Oka's male uniform, and platform shoes to make her look taller. In Chapter 70, Aki gives Natsuo a makeover, so he appears more "trendy". Natsuo's new look is described as slightly more feminine and elegant.
Before she transferred to Midori Ga Oka Academy, Mafuyu often wore the Higashi Middle School outfit; a white sailor uniform and a long skirt, which she didn't roll up. She also had long, bleached hair, though was made to cut it and dye it back to its original color by her mother. A long skirt and long bleached hair is stereotypical for a female Japanese delinquent. She also constantly carried around a wooden sword.
During Aki and Mafuyu's revisit to Saitama Prefecture during their short holiday, Aki gives Mafuyu a makeover to go to to Higashi High without being noticed by any of her friends. She wears a long wig and her Higashi High uniform with her skirt rolled up.
Mafuyu is honest and straightforward and knows very little about being an ordinary 'girly girl' because of her delinquent ways. She is shown to get very excited over experiencing 'normal' things for the first time, much to the confusion of others.
This also stems from the fact that she has spent her whole life surrounded by boys. Yui Shinobu notes that she mixes in with men seamlessly and without confusion.
On the other hand, she is quite nervous interacting with girls and is unsure how to approach them, despite being one herself. She tends to separate herself from them when she deems them 'angels' and is extremely touched when Hayasaka acknowledges her as one. In many circumstances in the manga, Mafuyu agrees immediately when given the chance to interact with 'cute girls'. This is shown when she is quick to beat up some students when she sees a pretty girl, though he is soon revealed to be a crossdressing Sakurada. Although she is given many chances to become a 'normal' student, she declines in favor of her lifestyle in the Disciplinary Club, which she values much more than pretty girls.
Mafuyu values friendship and is quick to defend her friends. She is extremely loyal to her friends and can become friends with anyone regardless of their first meeting. This is seen throughout the manga. Although he defeats her in battle and is cold to her at the beginning, Mafuyu helps Ayabe Reito reconcile with his family and eventually befriends him despite his position in the student council. In addition, she forgives Yui after his 'betrayal'.
As a child, Mafuyu moved to the Saitama prefecture. Both she and her mother introduced themselves to their neighbors- the Gojo family. Mafuyu told them that she wished to be a bunny rabbit when she grew up.
One day, Mafuyu followed Takaomi around. He grabbed her by the head, but she did not cry- rather, asking him if she could call him 'big brother' as she didn't have many friends in the neighborhood. Takaomi threw her across the road.
The next day, Mafuyu returned with multiple injuries, but still, with a large smile on her face. She had set up a game, but Takaomi tipped over all of the game pieces. Mafuyu still did not cry, and even incorporated the tipping into the game, as it was a 'pretend' game, and Takaomi was the mother-in-law while she was the daughter-in-law. Mafuyu then left to eat breakfast while singing a silly song.
Mafuyu watched Takaomi fight against Kita High in fear. Takaomi told her to run away, and Mafuyu finally shed a tear, saying that she would leave. The masses of battles Takaomi took her to would later make her go on the path of being a delinquent.
Mafuyu would force Takaomi to play games with her such as 'pretend couple', where the duo would reenact breakup scenes between couples based of soap operas. Takaomi would even get held down by other adults misinterpreting their game to be him hurting Mafuyu.
On her sixth birthday, Mafuyu asked Takaomi to get her a toupee (which he stole from Higashi High's principal). Mafuyu then gave the wig to Takaomi, telling him the he didn't have to worry about his roots. The wig was later hidden by Takaomi in Higashi High, and the legend passed down as a delinquent legend.
Mafuyu lost all her memories of Takaomi due to an incident before she moved, which is yet to be revealed. However, Takaomi himself has said that the reason her memories have been removed is because she fell off a swing set the day before he moved.
Before coming to Midori Ga Oka Academy she was the banchou of Higashi High. Her followers held a celebration for her after a fight one day and were quick to run away and leave her behind when the police arrived and Mafuyu's arrest led to her following expulsion. Her mother was furious when this happened and made Mafuyu swear she wouldn't get into another fight ever again. As to not disappoint her mom, Mafuyu became determined to transform from a delinquent to a proper lady and become an ultra-shiny, girly-girl high school student.
Super Bun and NatsuoEdit
As Mafuyu has retired from her delinquent days, Mafuyu is occasionally forced to disguise herself as "Usa-chan Man" (ウサちゃんマン "Super Bun" in the English manga) and "Natsuo" in order to hide her past. They are known as the 'shadow members' of the Disciplinary Club and only appear to resolve problems (e.g. the Cultural Festival). Takaomi and Aki both know the full story. It is hinted that Yui has realized it too. Okegawa and Ayabe both know Natsuo's true identity though it is unknown whether they know about Usa-chan Man also being Mafuyu.
A running gag throughout the manga is Hayasaka's idolization of Usa-chan Man. He acts like a 'girl in love', though it's made unclear whether it's love or admiration of her strength. They go on a Christmas date where he gives her his muffler; however it is noted that he doesn't look her in the eyes or attempt to find out her true identity; "turning his eyes away". A year later, he finds the muffler he gave Usa-chan Man in Mafuyu's wardrobe during the Disciplinary Club's Christmas party and it's suggested that he's begun to suspect her.
Natsuo is shown to be quite popular among the girls, due to Mafuyu's prince-like disposition which even restores Nonoguchi Kanon's belief in princes.
Takaomi and Mafuyu have a rather 'unique' relationship with each other. Mafuyu, was still in elementary school when she moved in next door to Takaomi, who was in Higashi High and grew attached to him. Most other kids were afraid of him but Mafuyu was the opposite, which somewhat scared him before causing him to eventually gain a soft spot for her. Somehow this evolved into a master/servant relationship in which Takaomi frequently made Mafuyu do errands for him. She secretly enjoyed this though, not because she was a masochist, but because she wanted him to say he was proud of her. Mafuyu seems to not remember much about Takaomi, for reasons yet to be revealed.
Hayasaka was Mafuyu's first friend at Midori Ga Oka. He is the only member of the Disciplinary Club who is not aware of Mafuyu's true strength and has not yet realized that she is both Usa-chan Man and Natsuo, though he respects them greatly. When they first meet, Mafuyu lets off a murderous in the seat next to him which causes Hayasaka to ask if he can go to the toilet in order to escape her and Mafuyu misinterprets this as an act of kindness. He remains wary for a while but Mafuyu quickly deceives him and he now believes she is an ordinary girl. Even though he seems indifferent to Mafuyu (due to her overly affectionate way of showing her friendship), he does care for her. He is often worried for her safety and is often trying to keep her away from the fights (as he is unaware that most often she is the one solving the fights).
Yui, Mafuyu and Hayasaka are best friends. At first, Mafuyu doesn't trust him as he is a former student-council member and he tries to take the Disciplinary Club down. However, he loses against Usa-chan Man and joins the club as a result. His obsession with ninjas (and goal to become one) earns him the nickname "Ninja" by Mafuyu. Though his motives for joining the club are questionable, Mafuyu considers Yui a close friend regardless. Mafuyu and Hayasaka confront him after discovering Yui was the one who caused the withdrawal of the other club members (as per order by Miyabi in attempt to make Yui realize his true feelings). During this confrontation, Yui realizes how he used Miyabi as a constant excuse and makes his own choice for the first time, in which he decides he wants to be with them. He knows Mafuyu's true identity and past.
Aki is the most recent member of the Disciplinary Club. He is the only student in Midori Ga Oka Academy that knows everything about Mafuyu's delinquent past . He is a first year student who causes Mafuyu trouble in the beginning of the new school year. He is infatuated with strong people. Aki was a former student of Higashi Middle School and attends Midori with the intent in becoming Mafuyu's kobun (Yakuza term for subordinate). Mafuyu at first tricks Aki into believing that she is in fact very weak, which leads him to blackmail her but she eventually saves him from some thugs. He was able to tell that both Usa-chan Man and Natsuo are Mafuyu from a glance.
Okegawa is the only other person (aside from Saeki, Yui, Aki and Ayabe) who knows Mafuyu is Natsuo. He values Mafuyu's friendship and comes to seek her advice when something is troubling him. It is hinted that he has become slightly smitten with Mafuyu, instantly recognizing her the moment he touches her, when he and Natsuo meet a second time. He is the owner of the pigeon Mafuyu saved a year ago and is revealed to be 'Ichigo Love', Mafuyu's pen-pal though both of them are unaware of it. He also tends to misinterpret and become jealous when Mafuyu interacts with other males as seen in Chapter 43, when accidentally overhears Mafuyu and Takaomi talking and runs off believing they have a romantic relationship and in chapter 65 when he chases Ayabe after he finds them together.
Ayabe and Mafuyu are mutual friends. Mafuyu calls him "Ayabean". He is another member of the student council and defeated Mafuyu when he tried to take the Disciplinary Club down to get his freedom from the student council. She began following Ayabe, trying to study him and find out why he beat her. At first he was completely oblivious even though she was following him quite closely. This gives her the nickname "Stalker Girl" by Ayabe's friends. Their relationship turns to friendship when Mafuyu discovers his past and helps him make up with his family. He treats her like a little sister and they often eat lunch together as it is revealed that Ayabe is a good cook. It may seem that Ayabe doesn't want Mafuyu around and rather be alone, she realizes in fact he likes having a lot of people around (something that he is used to due to having 5 siblings) and seems to enjoy having Mafuyu around.
As the former number 2 of Mafuyu's gang, Kangawa greatly admires and respects her. After she left, he became the banchou. It is revealed that in the past, he had come to challenge Mafuyu and was defeated, subsequently deciding to join Higashi High after his defeat. Although he is often seen messing around and in a good mood, he is considerate of Mafuyu's circumstances and tried to prevent her from getting involved in the 'war' between Higashi High and Nishi High. Eventually, Kangawa and the rest of the gang reassure her that they all still consider her as their comrade and she should come to visit them again. When she does come during the summer, she spends the first day with Sakurada, believing the gang members would be unhappy to see her. Kangawa is shocked, jealous and hurt by this and ignores her afterwards and when confronted by Mafuyu, he reveals he wanted to be the first one she looked for. It is unknown whether this is simply possessiveness as a friend and/or former subordinate to a leader to whom he greatly admired or whether he has romantic feelings for her.
Maizono, being one of Mafuyu's former followers, greatly admires and respects her, despite often making crude or casually rude remarks towards her. Maizono often tries to get Mafuyu to take out anger on him, even calling himself her personal sandbag. For some reason, Maizono does not mind going all out when fighting if Mafuyu is not present.
Mafuyu and Goto once worked together to help Okegawa graduate from school. Though she does not bare any ill will towards him, and even finds him quite useful, Mafuyu has admitted to her Saitama friends that Okegawa's followers (Goto and Kawauchi) were prime reasons that she didn't (potentially) date Okegawa.
- Mafuyu ranked 1st with a total of 7576 points in the character popularity poll conducted by Hana to Yume in early 2013. Her total score was made up of herself, Natsuo's (1682 points) and Super Bun's (106) points but Izumi Tsubaki stated that most of the points came from Mafuyu herself.
- Her favorite food is meat and potato stew, but she hates carrots.
- Her interests are comparing instant noodle brands.
- (To Saeki Takaomi) "You're wrong. I wasn't messing around. You didn't come up, so I thought you were drowning. I was trying to save you." 
- (To herself) [About Saeki Takaomi] "That's not fair. When you say that... it makes me really happy. Not too long ago... you said you didn't need me... and that I was a nuisance. I was in shock. No matter what I say... I probably really do admire him. That's why... I'll give up my perfect high school life for you." 
- (To Sakurada Asahi) "Since you're a bancho, you should know. If a former bancho constantly shows up, it'll disrupt the harmony of the gang. It's better if I stay away."