Osomatsu Matsuno (Eldest Son) An immature brat with the mental age of a 6th grader. He has no delicacy, loves dirty jokes, and is a total pervert who frequently sexually harasses others (often flipping girls' skirts). He is in the Go-Home Club. First person: I (rough, casual).

Karamatsu Matsuno (Second Son) Lacks confidence and is always timid, nervous, and prone to crying. He is a member of the Drama Club. First person: I (soft, polite).

Choromatsu Matsuno (Third Son) The only "serious honor student"? Except he's not actually smart... he gets zeros on his tests. His glasses are just for show. He has a high-pitched voice and calls the teacher "Teachy!" He constantly tries to act like a model student, but walks like a robot and trips often. He keeps porn mags in his bag. He is in the Go-Home Club. First person: I (soft, polite).

Ichimatsu Matsuno (Fourth Son) Always bright and never stops smiling. He tries his best to be social and make friends... but in reality, he's forcing himself and finds it painful. When no one is looking, his original gloomy, dark personality comes out, but he snaps back to being cheerful the moment someone speaks to him or approaches. He is in the Go-Home Club. First person: I (polite) / I (rough, when his true self shows).

Jyushimatsu Matsuno (Fifth Son) A high school senior who has somehow turned into a delinquent, though he's still kind at heart. He wears his pants so low his butt shows, and his fly is always open. He rides an imaginary bike and smokes imaginary cigarettes. He picks fights with inanimate objects or bugs by glaring at them, and somehow always loses. He is in the Go-Home Club. First person: I (rough, casual).

Todomatsu Matsuno (Sixth Son, Youngest) He loves his big brothers, especially Choromatsu. He's smaller and cuter than the others (almost like a toddler). He cries if his brothers aren't around and gets lost easily. He's a scaredy-cat who can't go to the bathroom alone, even during the day. He is in the Go-Home Club. First person: I (soft, polite).