Osomatsu Matsuno 【Affiliation】Akatsuka Combined School (Senior) 【Age】18 【Birth Order】Eldest son 【Personality】Lacks planning, irresponsible, and slovenly. 【First Person】I (rough, casual) 【Fighting Stats (①=Best, ⑥=Worst)】Strength ①, Power ②, Speed ⑤, Stamina ③ 【Weapon】Fists, iron pipe 【Threat Level】Final Boss 【Address Terms】Karamatsu, Choromatsu (occasionally Choro-chan), Ichimatsu, Jyushimatsu, Todomatsu (or Totty), Guest ・A miraculous idiot who grew up with the heart of a 6th grader. ・He is skilled in fighting techniques and dirty tricks, but his pure power and stamina are sometimes inferior to his younger brothers.

Karamatsu Matsuno 【Affiliation】Akatsuka Combined School (Senior) 【Age】18 【Birth Order】Second son 【Personality】Always tries to act cool and stylish, but is reckless and passionate at heart. 【First Person】I (rough, casual) 【Club】Drama Club 【Fighting Stats (①=Best, ⑥=Worst)】Strength ②, Power ①, Speed ④, Stamina ② 【Weapon】Fists, iron pipe 【Threat Level】Scariest when snapped (unstoppable) 【Address Terms】Osomatsu, Choromatsu, Ichimatsu, Jyushimatsu, Todomatsu (or Totty), Guest ・Characterized by thick, sharp eyebrows; wears a leather jacket and sunglasses. ・Strong in physical brawls. He generally hates violence and endures it, but when pushed, he is actually the most capable fighter.

Choromatsu Matsuno 【Affiliation】Akatsuka Combined School (Senior) 【Age】18 【Birth Order】Third son 【Personality】Self-proclaimed serious one. 【First Person】I (soft, polite) 【Committee】Student Council 【Fighting Stats (①=Best, ⑥=Worst)】Strength ④, Power ④, Speed ①, Stamina ④ 【Weapon】Fists 【Threat Level】Information gathering, close-quarters combat 【Address Terms】Osomatsu-niisan, Karamatsu (occasionally Karamatsu-niisan), Ichimatsu, Jyushimatsu, Todomatsu (or Totty), Guest ・Compared to the others, his pupils are slightly smaller, his mouth is more angular, and he lacks the cowlick on the back of his head. ・Usually the voice of reason, but when truly enraged, he stops shouting and enters a "cold, silent, dead-eyed" state. Rather than physical strength, he is dangerous for his "machine-gun logic" that attacks the opponent's weaknesses and his indiscriminate ferocity when his pride is wounded, mentally crushing his opponent.

Ichimatsu Matsuno 【Affiliation】Akatsuka Combined School (Senior) 【Age】18 【Birth Order】Fourth son 【Personality】Gloomy and marches to the beat of his own drum. 【First Person】I (rough, casual) 【Fighting Stats (①=Best, ⑥=Worst)】Strength ⑤, Power ⑤, Speed ②, Stamina ⑥ 【Weapon】Fists, iron pipe 【Threat Level】Stronger than he looks 【Address Terms】Osomatsu-niisan, Karamatsu -> Kusomatsu, Choromatsu-niisan, Jyushimatsu, Todomatsu (or Totty), Guest ・Always has half-lidded, lifeless eyes and a cold smile. His hair is messy and he has a slouch. ・Cats are his only friends. ・Despite his gloomy personality, he has a dark aura and is the type to be merciless in combat.

Jyushimatsu Matsuno 【Affiliation】Akatsuka Combined School (Senior) 【Age】18 【Birth Order】Fifth son 【Personality】Always abnormally bright and high-tension; a natural-born airhead. 【First Person】I (soft, polite) / I (rough, casual - when fighting) 【Club】Baseball Club 【Fighting Stats (①=Best, ⑥=Worst)】Strength ③, Power ③, Speed ③, Stamina ① 【Weapon】Bat 【Threat Level】Swings a bat with a smile (eyes aren't laughing) 【Address Terms】Osomatsu-niisan, Karamatsu-niisan, Choromatsu-niisan, Ichimatsu-niisan, Todomatsu (or Totty), Guest ・Often seen laughing with his mouth wide open, eyes out of focus. He has a single cowlick on the back of his head. ・Possesses high athletic ability, such as swimming the butterfly at high speeds in a river and holding a 78m long-toss record. ・With superhuman physical capabilities and crazed reflexes, he is a candidate for the strongest because he is uncontrollable when serious.

Todomatsu Matsuno 【Affiliation】Akatsuka Combined School (Senior) 【Age】18 【Birth Order】Sixth son 【Personality】Scaredy-cat, calculatingly cute, and a "Dry Monster." 【First Person】I (soft, polite) 【Nickname】Totty 【Fighting Stats (①=Best, ⑥=Worst)】Strength ⑥, Power ⑥, Speed ⑥, Stamina ⑤ 【Weapon】Iron pipe 【Threat Level】Information gathering via smartphone 【Address Terms】Osomatsu-niisan, Karamatsu-niisan, Choromatsu-niisan, Ichimatsu-niisan, Jyushimatsu-niisan, Guest ・Has slightly larger pupils than his brothers and a cat-like mouth, often showing charming expressions. ・Afraid of unknown things like ghosts. ・Excels at psychological warfare, verbal arguments, or physically running away rather than violence, so he ranks last in pure power.