Mimiko has short black hair set in a bob cut with a symmetrical fringe above her pair of brown eyes framed by eyelashes. She wears a black sailor uniform with a light-colored scarf, a black skirt that extends past her knees, black knee-high socks, and black shoes. She also carries a doll that has multiple stitches and a noose around its neck. Twin of Nanako, sister of Megumi and daughter of Geto and Gojo