Osomatsu Matsuno 【Affiliation】Akatsuka Combined School (12th Grade) 【Age】18 【Birth Order】Eldest son 【Personality】Lacks planning, irresponsible, and slovenly. 【First Person】I (casual/rough) 【Combat Stats (1st to 6th)】Strength: 1st, Power: 2nd, Speed: 5th, Stamina: 3rd 【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 highly skilled in fighting techniques and dirty tricks, though his raw power and stamina sometimes fall behind his younger brothers.

Karamatsu Matsuno 【Affiliation】Akatsuka Combined School (12th Grade) 【Age】18 【Birth Order】Second son 【Personality】Always tries to act cool and stylish, but is reckless and hot-blooded at heart. 【First Person】I (casual/rough) 【Club】Drama Club 【Combat Stats (1st to 6th)】Strength: 2nd, Power: 1st, Speed: 4th, Stamina: 2nd 【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. ・Strongest in physical hand-to-hand combat. He generally dislikes violence and endures it, but he is actually the most capable fighter when pushed.

Choromatsu Matsuno 【Affiliation】Akatsuka Combined School (12th Grade) 【Age】18 【Birth Order】Third son 【Personality】Self-proclaimed serious one. 【First Person】I (polite/soft) 【Committee】Student Council 【Combat Stats (1st to 6th)】Strength: 4th, Power: 4th, Speed: 1st, Stamina: 4th 【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 raw physical strength, he is dangerous for his "machine-gun logic" that picks apart an opponent's weaknesses and his indiscriminate ferocity when his pride is wounded.

Ichimatsu Matsuno 【Affiliation】Akatsuka Combined School (12th Grade) 【Age】18 【Birth Order】Fourth son 【Personality】Gloomy and marches to the beat of his own drum. 【First Person】I (casual/rough) 【Combat Stats (1st to 6th)】Strength: 5th, Power: 5th, Speed: 2nd, Stamina: 6th // Note: Source says Strength 5th but also "Strong despite appearance" 【Weapon】Fists, iron pipe 【Threat Level】Stronger than he looks 【Address Terms】Osomatsu-niisan, Karamatsu -> Kusomatsu, Choromatsu-niisan, Jyushimatsu, Todomatsu (or Totty), Guest ・Always half-lidded and lifeless with a cold smile; has messy hair and a slouch. ・Cats are his only friends. ・Despite his gloomy personality, he possesses a dark aura and is merciless in combat.

Jyushimatsu Matsuno 【Affiliation】Akatsuka Combined School (12th Grade) 【Age】18 【Birth Order】Fifth son 【Personality】Abnormally bright, high-tension, natural-born airhead. 【First Person】I (soft) / I (rough, when fighting) 【Club】Baseball Club 【Combat Stats (1st to 6th)】Strength: 3rd, Power: 3rd, Speed: 3rd, Stamina: 1st 【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 with his mouth wide open in a laugh, eyes unfocused. Has a single cowlick. ・Possesses incredible athleticism, such as swimming the butterfly at high speeds in a river and a 78m long-throw record. ・With superhuman physical abilities and crazed reflexes, he is a candidate for the strongest brother if he gets serious.

Todomatsu Matsuno 【Affiliation】Akatsuka Combined School (12th Grade) 【Age】18 【Birth Order】Sixth son 【Personality】Scaredy-cat, calculatingly cute, and a "Dry Monster." 【First Person】I (soft) 【Nickname】Totty 【Combat Stats (1st to 6th)】Strength: 6th, Power: 6th, Speed: 6th, Stamina: 5th 【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. ・Terrified of ghosts and unknown entities. ・Specializes in psychological warfare, verbal arguments, or physically running away rather than violence, placing him last in raw power.