Shinobu grew up in a loving household as the youngest daughter of parents who worked in compounding medicine, which laid the foundation for her advanced pharmaceutical knowledge. After a demon slaughtered her parents, she and her older sister, Kanae Kocho, were saved by the Stone Hashira, Gyomei Himejima. The sisters subsequently swore an oath to join the Demon Slayer Corps. Over time, they also adopted Kanao Tsuyuri as their younger sister and trainee. Following Kanae’s tragic death at the hands of the Upper Rank Two Demon, Doma, Shinobu inherited the leadership of the Butterfly Mansion and eventually ascended to the rank of Hashira.

Appearance:
Shinobu has a highly petite and slender build. She features a pale complexion and large, pupil-less purple eyes designed to resemble those of an insect. Her raven-black hair fades into a dark purple at the tips and is styled into a yakai-maki bun fastened with a prominent white and purple butterfly ornament. Her outfit consists of the dark-purple tinted Demon Slayer uniform paired with a white, butterfly-wing patterned haori that previously belonged to her late sister.