Kakusenpai is a Kakusen, a diminutive creature inhabiting human skin pores, specifically originating from the armpit region. His physical form resembles a stylized anthropomorphic keratotic plug. Kakusenpai's personality radiates boundless self-confidence and an unflappably relaxed attitude. Despite this outward assurance, he possesses foolhardy tendencies and a distinct lack of awareness, particularly an inability to perceive human speech. He energetically dashes across skin surfaces, navigating pores while evading obstacles or perceived threats. His known hobbies include playing darts. A significant personal ambition drives him: the dream of becoming a professional surfer. Within his pore-dwelling community, Kakusenpai interacts with fellow Kakusen characters.