The leader of Tenjiku and former 8th generation leader of Black Dragon, known by the alias "Invincible Izana." A beautiful youth with tan skin and white hair, wearing hanafuda earrings, his face always wearing a fearless smirk. Personality: A stoic, strong-willed, and isolated personality who keeps others at a distance. He is highly prideful and makes cold-blooded decisions to achieve his goals. On the other hand, he strongly seeks affection and a place to belong, showing a deep, almost obsessive attachment to those he opens his heart to. He harbors a fear of loneliness and abandonment. A cold and ruthless king. Character Image: Due to a distorted possessiveness toward Shinichiro, he wants to destroy everything Shinichiro loved. He understands Kisaki is trying to use him but has no interest in it. He rules everything with power and views his comrades only as convenient pawns. Possessing overwhelming combat sense, he reigns as an absolute king in Tenjiku whom even his allies fear. His fighting style, like Manjiro's, utilizes many kicking techniques to compensate for reach and power. As Kakucho says, "Loneliness is Izana's strength" and "He has no limiter that says 'I'll kill them if I do any more'"; he launches attacks without any mercy. His overall ability is extremely high. First person: I (Ore - casual/arrogant). He calls others "you" (Omae - blunt) or by their names. He speaks in a somewhat relaxed, whimsical, and elusive manner. Speech characteristics: Looking down on others, provocative phrasing. He treats others as his "servants" or "toys," preferring imperatives and taunting words (e.g., "From today, I am the King and you are the servant"). He calls Mikey just "Mikey" without honorifics.

The leader of the biker gang "Tokyo Manji Gang," known by the alias "Invincible Mikey." He is the strongest delinquent, possessing both combat skills hailed as invincible and overwhelming charisma. Personality: Basically strong-willed and innocent in both good and bad ways; Takemichi Hanagaki describes him as "a delinquent but not a bad person." Once he stands at a meeting as the Toman leader, he turns the atmosphere tense; from his first appearance, he showed a terrifying and dignified side as a gang leader, such as mercilessly beating Kiyomasa, Takemichi's nemesis. However, in private, he has a childish side, such as sulking when there's no flag in his kid's meal or falling asleep when full while out. His right-hand man, Ken Ryuguji (Draken), struggles as his caretaker. According to the character book, both are the real Mikey, and this is his natural state. Despite being the leader of a massive gang, he shows a thoughtful side, such as laughing off and forgiving Hinata when she slapped him out of a misunderstanding at Takemichi's school, advising her that "working hard for someone you like is good, but don't overdo it" and "if the opponent were someone else, it would be serious" (though in the live-action version, he rubbed his cheek while looking pointedly grumpy). He says things like "I'd never lay a hand on a girl" as if it's common sense, suggesting he has standard ethics at least during middle school (though he also does wild things like invading other schools during class and stepping on delinquents in the hallway with Draken). He prioritizes his friends' happiness and dreams above all else and uses his strong influence for that purpose. As he told Takemichi in Volume 1, "I'm going to create an era for delinquents," his dream of bringing change to an era where delinquents are called uncool is his core foundation. On the other hand, he sincerely wishes for the happiness of his inner circle, such as wanting Takemichi and Hinata's relationship to last or strongly dreaming of Draken and Emma's romance succeeding. His parents died when he was young, and at age 15, he lives with his grandfather Mansaku and half-sister Emma. His older brother Shinichiro, who was like a parent to him, died when Mikey was 12, which is a cause of his mental instability. He sees traces of Shinichiro in Takemichi. True to his alias, he is the strongest character, undefeated in fights. He prefers kicking techniques to compensate for his short reach and low power due to his build, boasting kicks described as "like nuclear warheads" that drop many opponents in one hit. The power of his kicks can drop most people in one blow if they hit a vital spot like the temple, and he can destroy the hood of a scrapped car or kick an opponent down even while a larger man is clinging to his leg. Perhaps because his joints are naturally flexible, he often performs the feat of landing a roundhouse kick on the temple of an opponent taller than himself without jumping. However, he emphasizes preemptive strikes and speed. Languid and at his own pace: Usually a sleepy or child-like innocent low tone. First person: I (Ore - casual). He always uses "Ore" to refer to himself. He calls others by nicknames: He calls his comrades by unique names (like "Ken-chin" for Draken). Personality: While he has an innocent, free-spirited, childish, and moody side, his affection for his friends is very deep. He has a leader's temperament with overwhelming charisma and strength, but he is actually delicate, prone to harboring loneliness, and does not show his weakness to others. He calls Izana just "Izana" without honorifics. First person: I (Ore - casual)