Izō Aiba

is a male delinquent from South Chinpira High School with a corresponding reputation to Tatsumi Oga of a "child carrying gang leader".

Appearance
Izō is a tall, lean-built young man. He has dark eyes and light colored hair that is somewhat slicked back, save for a tuff of hair that falls over his forehead. He dresses in his school's uniform and carries his younger sister in a small sleeping bag attached to a strap on his back.

Personality
Despite being the leader of a bunch of vicious thugs, his personality is strikingly kind and calm. He is congenial towards Tatsumi Oga and appears attracted to Aoi Kunieda. Even after learning that she was the same person as the female Tōhōshinki of Ishiyama, he was neither angered nor hurt. Instead, simply surprised and cheerful as he said that now, he's more in love with her than ever. Aiba is very relaxed and prefers not to fight, unless he has good reason for it.

His easy-going, relaxed ways are backed up by immense physical power and, being a delinquent, he is rather tough and intimidating at times and won't hesitate to use violence in situations. He commonly attacks his own underlings but is willing to fight for them, during occasion. However, he does also appear chivalrous as he chose not to hit Nene Ōmori despite her hostility towards him.

Okinawa Arc


Izō makes his appearance after his fellow classmates started a fight with the students of Ishiyama High and St. Ishiyama Academy, and complains that the bus that carried him to the hotel made him sick. He is stated to be the rumored "child-rearing badass" that people have been talking about, the child actually being his younger sister, Chiyo Aiba. He tells his classmates not to mess with other schools but when one starts talking to loudly, he does a finger flick on the person's head and sends him flying. He apologizes to Oga and notices that he also has a child, causing him to question Oga's name. Oga gives a fake name, annoying Izō, and Aoi interferes between the two so that a fight won't ensue. He suddenly asks whether Aoi is in a relationship with Oga, which she denies, and Aiba takes this as an opportunity to make advances toward her. He tries to contact her by any means, which makes Nene to show hostility towards him.



He later meets with Oga in a corridor and tries to convince him to show the way to Aoi's room, but he then notices a change in Chiyo and says that his sister has fallen in love with Oga' s child, Beelzebub, much to Oga's surprise.

Powers and Abilities
Izō is shown to be immensely strong for a delinquent, even being compared to the same strength as Oga. He is able to flick one of his fellow students with just his finger, and send the same student flying into a wall pillar. He carries his younger sister, Chiyo, over his back in a similar fashion as Oga's, but whether he is a contractor is currently unknown.

It is also observed by Hilda and Oga that he shows a slight presence of demonic aura. However, it maybe due to him meeting Koma and fighting with him against Oga.

Chiyo Aiba
Aiba cares a lot about his younger sister and often carries her on his back, which led to his reputation as a "child-rearing gang leader". He describes her as being precocious and, possible because of it, often lets her due things independently such as take Baby Beel closer to the dolphin attraction at the aquarium in Okinawa.

Tatsumi Oga
Aiba is friendly to Oga. He became interested in him upon learning that Oga also had a child to carry on his back. Aiba commonly referred to Oga as "Madason" as he didn't know his name before. Upon learning his true identity, he became even more interested in him and apparently more angered, possible because of the rumors he heard about Oga.

Aoi Kunieda
Since meeting her, Aiba has become infatuated with Aoi and has repeatedly flirted her. He is shown to care about her to a degree, becoming angered with Oga when he sees that Oga is (unintentionally) toying with her feelings for him. Upon realizing that she is the same Aoi Kunieda of the Tōhōshinki, he was neither angered nor upset. Instead, he was happy and found himself more in love with her than ever.

Hidetora Tōjō
Aiba knows who Tōjō is and seems well-acquainted with him, being very casual during conversations with him. However, this only appears to be one-sided. Tōjō finds Aiba to be strong and has challenged him to a fight before, even going as far as to make a pathetic excuse to fight when Aiba refuses to. However, it may be that he was just desperate to fight anyone that was strong.

Quotes
"Be...Quiet."

"Actually,I think I love you even more."-to Kunieda