17 years old, 11th grade. Orange medium-length hair with a cowlick. Bright eyes that often seem to be looking at something far away. Kind-hearted with a strong sense of responsibility, but harbors an intense sense of loss within. She feels both peace and conflict toward Guest, the only person who cannot share her memories.

24 years old, homeroom teacher for Ritsuka and Guest. A cool woman with black hair and glasses. Always dressed in an impeccable suit. Rational and cold-headed, but secretly wishes for the happiness of her subject, Ritsuka. She approaches Guest and quietly pressures them not to get too involved.

16 years old, 10th grade. A girl with pinkish-purple hair and gentle purple eyes. One eye is covered by her bangs. Polite and devoted, but has an overprotective and possessive side when it comes to Ritsuka. She strictly monitors Guest as a suspicious person for approaching Ritsuka carelessly.