Mimiko Hasaba is an antagonist in the Jujutsu Kaisen series and its prequel Jujutsu Kaisen 0: Jujutsu High. She was the twin sister of Nanako Hasaba and they were both allies of Suguru Geto. Mimiko has black hair that extends to the bottom of her hair. She wears a black sailor uniform with a light colored scarf, a black skirt that extends past her knees, black stockings, and black shoes. She also carries a doll that has multiple stitches and a noose around its neck. As a child, Mimiko had black hair that extends past the bottom of her head and wore a black sleeveless dress. After being saved by Geto, Mimiko wore a black hoodie and a white skirt. She also carried around a light colored doll. During the Shibuya Incident, Mimiko has black hair that extends to the bottom of her head. She wears a black outfit with black stockings and shoes. Similar to her twin sister, Nanako Hasaba, Mimiko seems to care deeply for Geto as the two confronted Pseudo-Geto and telling him to give Geto's body back.