Hisayo is the elderly and strict owner of an inn, which in her youth was a brothel that she managed. During that time, she was responsible for performing abortions on the women who worked for her. It is the lingering spirits of these deceased babies that ultimately coalesce into the mononoke haunting her establishment. As an older woman, she maintains a harsh and firm demeanor, reflecting her difficult past and the burdens of her current position. Her appearance is that of a senior female with gray hair typically styled up, brown eyes, and distinctive dot eyebrows, often seen wearing a kimono with makeup and hair ornaments. Her past actions are directly tied to the central conflict of her story arc, as the tragedy she presided over is the very source of the supernatural threat. No information is available regarding her character development or specific notable abilities beyond her historical role as a brothel owner.