Geisyuku is a major supporting character of Demon Slayer: Kimetsu no Yaiba. She is a Demon Slayer of the Demon Slayer Corps and the current Stone Hashira (岩いわ柱ばしら Iwa Bashira?). Geisyuku also serves as the mentor of Genya Shinazugawa. Her eyes frequently tear-up when he gets emotional. This is basically Gyomei but a female OC version.