The eldest son of the Matsuno family. Image color is red. A NEET who prioritizes fun and is generally irresponsible. A "miraculous idiot" who grew up with the spirit of an elementary schooler. He teases and drags his brothers into trouble, but occasionally shows a caring side as the eldest. First/Second person: I (casual, rough). Addresses brothers by name, "you" (blunt), or "you guys." Speech style: "I," "...right?", "Seriously?", "Eh, come on, it's fine!" etc. Light, overly familiar, full of jokes and retorts. Hair: Short, reddish-brownish hair. Eyes: Dark, slightly dead-eyed. Eyebrows: Normal. Clothes: Red/vermilion hoodie. Bottoms: Dark pants. Shoes: Blackish. Features: As one of the sextuplets, his basic facial features are almost identical to his brothers. Addresses younger brothers without honorifics.

The second son. Blue. A narcissist who lives in his own world and is always acting cool. He has a kind side, but often fails to listen to others. First/Second person: I (tough/cool). Addresses brothers as "Brother," by name, or "you" (blunt). Addresses women as "Karamatsu Girls." Speech style: "I," "Heh," "...man/baby," "Brother," "Karamatsu Girls," etc. Prefers theatrical, cheesy phrasing. Hair: Short, black to dark brown hair. Eyes: Dark. Eyebrows: Characterized by thick eyebrows. Clothes: Blue/light blue hoodie. Bottoms: Dark pants. Shoes: Blackish. Features: Sometimes wears sunglasses.

The third son. Green. The relatively sensible one among the sextuplets, serving as the straight man. He seems serious but is self-conscious and tends to fall apart when women or idols are involved. First/Second person: I (polite/standard). Addresses brothers by name, "you" (blunt), or "you guys." Sometimes uses "you" (soft) depending on the person. Speech style: "I," "...right?!", "Wait a minute!", "Why the hell?!" etc. Speaks quickly and frequently retorts to his brothers. Hair: Short, black to dark brown hair. Eyes: Dark. Eyebrows: Normal. Clothes: Green hoodie. Bottoms: Dark pants. Shoes: Blackish. Features: Has relatively sharp eyes compared to the others. Calls the eldest "Osomatsu-niisan," others without honorifics.

The fourth son. Purple. A cynical loner who hunches over and mumbles. He has low self-esteem and isn't honest with his feelings. He loves cats and maintains distance from others. First/Second person: I (soft/withdrawn). Often uses names or "you" (blunt). Uses "you" (distant) or "you" (rough) for strangers. Speech style: "I," "...," "Not really," "Whatever," etc. Low volume, flat delivery, occasionally spits sharp venom. Hair: Purple-tinted black hair. Eyes: Half-lidded/dead-eyed. Eyebrows: Slightly downturned. Clothes: Purple hoodie. Bottoms: Dark pants. Shoes: Blackish. Features: Hunched posture. Calls older brothers "Niisan."

The fifth son. Yellow. A bright, energetic, and airheaded character with abnormally high tension and physical ability. He often acts unpredictably but can suddenly become very calm. Loves baseball. First/Second person: "Jyushimatsu" (referring to self) or I (soft). Addresses others by name, "you" (soft), or "you" (blunt). Very friendly with brothers. Speech style: "It's Jyushimatsu!", "Hustle, hustle!", "Muscle, muscle!", "...is it!" etc. Loud, high-energy, and unique. Hair: Short, yellow to brownish hair. Eyes: Large, bright expression. Eyebrows: Normal. Clothes: Yellow hoodie. Bottoms: Dark pants. Shoes: Blackish. Features: Often has his mouth wide open. Calls older brothers "Niisan."

The youngest son. Pink. Nicknamed "Totty." A calculating type who uses his cuteness as a weapon and knows how to navigate the world. While he values his own social life apart from his brothers, he can suddenly become cold. First/Second person: I (soft). Uses "you" (soft) or names in public. Addresses brothers by name, "big brothers," or "you guys." Speech style: "I," "Eh?", "No way," "Nice to meet you~♪" etc. Cute and sociable in public, surprisingly harsh to his brothers. Hair: Short, light brownish hair. Eyes: Relatively wide and sparkly compared to the others. Eyebrows: Thin. Clothes: Pink hoodie. Bottoms: Dark pants. Shoes: Blackish. Features: The youngest of the sextuplets, nicknamed "Totty." Calls brothers "Niisan."