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 a dark eyes and slicked back, save for a tuff of hair that falls over his forehead liked a young Zenjuro Saotome. Unlike a young Saotome's hair color is black, Izo's hair color is light colored. 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.

The two delinquents head to Aoi's and the Red Tail's room where they learn that Chiyo, Aiba's younger sister, is actually attracted to Baby Beel because of his male reproductive organ. In the meantime, Nene is displeased that Oga and Aiba had barged into their room, especially with Aiba. Aoi asks why Chiyo joined her brother on the field trip and she explains how she, a passionate activist on books and fortune-telling, found in a horoscope that she would have an encounter on a southern island. It's then revealed that both Aiba and Oga are Virgos themselves. Nene decides to move the topic elsewhere and tells Aiba that Ishiyama doesn't want to fight with South Chinpira, and that it's probably vice-verse for him. Aiba admits that he doesn't want to fight either.

Thinking about Aiba's words, Aoi considers eating with Aiba during the next day. Aiba excitedly agrees to the offer but Aoi quickly changes it around, suggesting that Oga should go with them. Hesitantly, Aiba allows it.

Aiba brushes off the matter, sure that Ishiyama wasn't directly responsible for everything. He then sees Koma face-down in the ocean (due to being flushed down the toilet by Aoi earlier). Aiba rescues Koma who then introduces himself to the two students of South Chinpira. He recognizes Aiba as the person interested in Aoi and uses the situation to his advantage. Koma says how he's a god and that, because Aiba saved him, he'll grant the teenager a wish just as long as it's related to love. Aiba ponders the wish for a brief moment. Aiba then arrives, late, and sees Hilda. He takes Oga aside and punches him for bringing along two girls. He angrily asks who he actually likes and when Oga hesitates, Aiba and Oga talk privately. Aiba reveals that he knows about the supposed relationship between Oga and Hilda. He wants Oga to be fair to Aoi with her feelings, but due to his density,

Aiba is told that Kanzaki beat up some of the South Chinpira students, then berated by Kanzaki himself for not being as authoritative over his underlings. Instead of turning to Kanzaki, Aiba attacks Shigeharu and sends him flying into the ocean. Tōjō arrives and challenge Aiba to a fight, claiming to be bored. Aiba recognizes him[25] but decides not to fight, as he believes it's pointless and because he's on a "date" with Aoi. Tōjō tries to think of a reason to fight but fails, so he attacks Aiba anyway. Aiba not only dodges but manages to counterattack. Aiba becomes angered. Aoi then walks up to him and reminds him of the deal he'd made. Aiba tries to explain things but Aoi walks away.

Aiba and Aoi visit Okinawan shops and Oga considers buying ryukyu glass for his sister. Aiba becomes jealous that Oga is spending time with Aoi and says that they'll have to fight each other to settle their score.Aiba finds his fellow schoolmates and learns from one of them about what had happened, angering him.

Aiba suddenly enters the room and yells out that he needs to talk with theTōhōshinki. He goes to the beach with Oga and Baby Beel, as Hilda and Furuichi wait nearby. The Ishiyama Tōhōshinki soon arrive, annoyed at having been called so early in the morning. Aiba is surprised to learn that Aoi is actually Aoi Kunieda, former leader of the Red Tail. Happy, he asks if she can be his woman causing Aoi to fluster in embarrassment. He challenged Hidetora Tōjō to a fair battle, as he wants to end their schools' feud once and for all. However, he is told that the actual leader of Ishiyama is Oga, who is the same person that Aiba's known all along. Aiba walks up to Oga, now realizing that he's the child-rearing gang leader infamous in Ishiyama. Seeing Aiba's expression, Oga decides to fight him. However, Aiba notes that Oga isn't really serious about their fight and wonders if he actually is stronger than Tōjō. But then, Oga attacks him with a powerful punch. Aiba manages to dodge it, causing Oga to hit the ground instead and create a large crater in the sand. Aiba notes on how interesting the fight's becoming.

As seawater pours into the crater, Aiba says how the rumors he heard about Oga appear true. Aiba turns to Aoi and bets that if he wins, she should go on a date with him, surprising her. Hearing this, Aiba goes to Oga and says how excited he is about the fight. Aiba holds his hand up in position to flick Oga's forehead. Remember what happened earlier, Oga does the same thing to Aiba. As the others remark on the situation, the two delinquents agree to attack at the same time once they receive a signal. Aiba and Oga flick each other simultaneously and begin fighting with punches and kicks, becoming evenly-matched. Aiba shows that he's impressed with Oga's strength and decides to use his full power, drawing out slight Demonic power. A beastly Koma suddenly appears behind Aiba, surprising both Oga and Aoi. Koma states that he plans to get revenge on Aoi for flushing him down a toiler earlier, doing so by defeating Oga and making her go on a date with Aiba, who is unaware of Koma's presence.

Aiba and Koma end up falling down on the sand. Aiba lies defeated on the beach, complimenting and praising Oga for his brute power, even adding how he took down a "god". a smiling Aiba casually says how frustrating things are. At the airport, Aoi is approached by Aiba and they talk. He says that he's given up on her, but only until she comes back. Aoi laughs in amusement and admits that she likes a certain someone.

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