Yumi Totobami

Yumi Totobami is a member of The Hundred Devouring Families. She arrived to the Hyakkaou Private Academy to help her adoptive sister, Terano Totobami, with a plan to dethrone Kirari Momobami. Yumi was an unnamed child who had presumably been homeless several years before the main storyline occurred, as she was seen searching through trash cans with other children. The Totobami family welcomed her into their estate, naming her Yumi, to have her be a servant for Terano, acting as her caregiver and bodyguard; despite that, they became very close, treating each other as siblings.