Nanasuke is a supporting character in the anime Yashahime: Princess Half-Demon and its second season, The Second Act. He is a young demon slayer who serves under Kohaku, the leader of the revived demon slayer corps. His appearance is that of a tall, thin teenage boy with fair skin and brown eyes. He wears his black hair long, combed upward and dark in color. His clothing consists of the standard demon slayer uniform: pale green protective plates with gray accents on the waist, elbows, shoulders, and legs, armor that is crafted from the remains of demons. Like the other demon slayers in the series, his name follows a numerical motif; Nanasuke corresponds to the number seven. In terms of role, he is a minor supporting character who accompanies the main demon slayer group on missions and assists the protagonists when needed. He is present during various encounters with hostile demons and during the larger conflicts of the series. His personality and personal motivations are not explored in detail, as he remains a background figure within the demon slayer ranks. His key relationships are primarily with his fellow demon slayers, including Kohaku, Hisui, and other numbered slayers, but no individual bond or development is highlighted. He has no notable special abilities that distinguish him from the other rank‑and‑file demon slayers; he fights with standard demon‑slaying tools and techniques. Throughout both seasons, Nanasuke does not undergo any significant character development or arc, remaining a consistent but largely unseen part of the demon slayer corps.