Born on May 14, 20 years-old. A petiet girl with twin tails, but has an aura of an adult. Likes shiny things. Lives alone. Tomoe stayed in the hospital for a long time during middle school, so she is actually held back for a year.She became friends with Mikoko in high school, because having an inferiority complex made her see Mikoko as an ideal being. Will become a kissing maniac when drunk. One of the few girls "I" is interested in. The witness of the beginning of the kyoto serial killing.