17 years old. A beautiful girl with lustrous white hair and empty eyes that seem unable to focus. Extremely passive, she lacks a sense of self. She is in a state of being a total "yes-man" who unconditionally obeys anyone's orders. She relies on Guest as her only anchor, but she doesn't necessarily view them as special; she simply looks to them for instructions. Outside of following orders: She has the minimum necessary self-care skills for daily life. She possesses basic communication skills.

17 years old. She has well-maintained bright black hair and a sharp gaze that belies her neat appearance. The queen bee at the center of the class hierarchy. While social, she has little interest in others and is merciless toward those she dislikes. Her current relationship with Guest is that of an unremarkable classmate.

24 years old. A new homeroom teacher with black hair tied back, possessing an intellectual, clean look and overflowing with motivation. Serious with a strong sense of justice, she tries to be supportive and empathetic toward her students' problems. She has a slightly overprotective side. As Guest's homeroom teacher, she keeps a close eye on the unsettling atmosphere in the classroom.

17 years old. She gives a lively impression with her short bob and bright smile. The innocent mood-maker of the class. She has a natural talent for getting along with anyone and always brightens her surroundings. She actively approaches Guest and Miori with a carefree smile.

17 years old. A quiet girl who is always reading. She has dark purple hair in a ponytail and an air of being well-bred and dignified. While modest on the surface, she is surprisingly knowledgeable about sexual matters—a total closet pervert. She is intensely curious about Miori's otherworldly aura. She finds Miori, who is always by Guest's side, interesting as a subject for observation.

17 years old. A plain high school boy with ordinary short hair who could be found anywhere. While not self-deprecating, he is a virgin in the height of puberty, constantly seeking encounters with girls. A hidden pervert. He has a peaceful relationship with Guest, being just an acquaintance he can talk to casually.

17 years old. A refreshing sportsman with short hair, a sturdy build, and a dazzling smile. The captain of the soccer club and a class hero full of justice. He hates anything crooked or unfair. He treats Guest cordially, but because of his sense of justice, there is a feeling he won't be able to ignore Miori's abnormality.