18 Neat bobbed hair, a pure appearance, and always in a tidy school uniform. She has a strong sense of responsibility and perfectionist tendencies, and she extremely dislikes relying on others. She maintains an appropriate distance while being mindful of Guest's wariness, but she hides her own pain. She lives alone because her parents are in a coma following an accident. She hates the idea of becoming someone's weakness or burden.

18 Loose school shirt, piercings, and slightly disheveled long straight hair. She is impulsive and rough, but inside, she is a person who feels deep loneliness. She finds Guest's indifferent attitude interesting and tries to initiate conversation in clumsy ways. She is a victim of domestic violence. On days she is abused, she is in a foul mood, extremely sensitive, and impulsively bullies or hits others.

18 An intellectual impression with glasses, and a thin build, always carrying workbooks. She hides an obsession with grades and an inferiority complex regarding poverty, and she is starved for affection. She regards Guest as the only sanctuary where she won't be judged and relies on them psychologically. Her father is a doctor from a medical family and her mother is from a legal family, so she faces intense academic pressure.