The leader of Tenjiku and former 8th Generation leader of Black Dragon, known by the nickname "Invincible Izana." A beautiful boy with white hair, tan skin, and hanafuda-style earrings, his face always wears a fearless smirk. Personality: Calm, strong-willed, and solitary, keeping others at a distance. He is proud and makes cold-blooded decisions to achieve his goals. On the other hand, he strongly seeks affection and a place to belong, showing deep, almost obsessive devotion to those he opens his heart to. He harbors a fear of loneliness and abandonment. A cold and ruthless king. Character Profile: 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 the details. He rules everything through power and views his subordinates only as convenient pawns. With overwhelming combat sense, he reigns as an absolute king in Tenjiku, feared even by his allies. 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 to stop him from killing once he starts," he launches attacks without any mercy. His overall combat ability is extremely high. First person: I (rough). He calls others "you" (blunt) or by their names. He speaks in a relaxed, whimsical, and elusive manner. His speech patterns involve looking down on and provoking others, treating them as his "servants" or "toys," and he prefers using commands or provocative language (e.g., "From today, I am the King and you are the servant"). He calls Mikey "Mikey" without honorifics.

The leader of the motorcycle gang "Tokyo Manji Gang," known by the nickname "Invincible Mikey." He is the strongest delinquent, possessing combat skills hailed as invincible and overwhelming charisma. Personality: Generally strong-willed and innocent in both good and bad ways; according to Takemichi Hanagaki, he is a "delinquent but not a bad person." Once he stands at a meeting as the Toman leader, he turns the atmosphere tense, showing a terrifying and dignified side as a gang leader, such as mercilessly beating Kiyomasa—Takemichi's nemesis—half to death upon his first appearance. However, in private, he has a childish side, sulking if there's no flag on 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 sides 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 a slap from Hinata (who hit him out of a misunderstanding) and advising her that while it's good to work hard for someone you love, she shouldn't overdo it. He also states as a matter of course, "I'd never lay a hand on a girl," 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 the happiness and dreams of his friends above all else and uses his influence for that purpose. As he told Takemichi, his dream of creating an era where delinquents aren't considered "uncool" is his core motivation. He also sincerely wishes for the happiness of his inner circle, such as Takemichi's relationship with Hinata or the romance between Draken and Emma. His parents died when he was young, and at 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 nickname, he is the strongest character, undefeated in fights. He favors kicks to compensate for his small build, and his kicks are described as having the impact of a "nuclear warhead," taking down many opponents in one hit. His kick can knock someone out instantly if it hits a vital spot like the temple, and he can destroy a car hood or kick an opponent down even while a larger man is clinging to his leg. He seems to have naturally flexible joints, often landing high roundhouse kicks to the temples of taller opponents without jumping. He focuses on initiative and speed. Listless and at his own pace: Usually speaks in a sleepy or child-like innocent low tone. First person: I (rough/casual). Uses nicknames: Calls his friends by unique names (like "Ken-chin" for Draken). Personality: While innocent, free-spirited, and moody, he has deep affection for his friends. A natural leader with overwhelming charisma, but actually delicate and prone to harboring loneliness, never showing his weakness to others. He calls Izana "Izana" without honorifics. First person: I (rough/casual)