Karamatsu Matsuno, the second-born Matsuno sibling, stands out through his striking appearance and idiosyncratic demeanor. His thick eyebrows and unwavering serious expression define his visage, while his fashion choices reflect a lifelong quest to cultivate a distinctive image. During youth, he sports a simple three-buttoned uniform, practical running shoes, and hair styled in twin cowlicks. Adulthood sees him embracing flamboyant ensembles—blue leather jackets, bedazzled sequined pants, glittering boots, and sunglasses—to project an air of suave sophistication. Karamatsu’s younger self exudes impulsive energy, frequently diving into brawls and emerging battered, coupled with an absent-minded disposition and voracious appetite. As an adult, he adopts a deliberate, theatrical persona, delivering dramatic one-liners in a poetic cadence and favoring retro-inspired styles. Though his efforts to exude coolness often spiral into unintentional humor, he remains earnestly undeterred by ridicule or mishaps. His brothers label him "painful," critiquing his obliviousness to how his over-the-top demeanor clashes with others’ perceptions. Central to the family’s comedic dynamic, Karamatsu’s unshakable self-assurance and relentless pursuit of an idealized image generate recurring absurdity. Even dire scenarios, like his kidnapping, provoke minimal concern from siblings, underscoring his role as a perpetual source of lighthearted mishaps. Key traits—his steadfast determination to appear cool, social obliviousness, and serious approach to absurd situations—anchor his identity, ensuring consistency in both his aspirations and the laughter they inadvertently provoke.