Ren Asahina 17 years old, 2nd year high school student, 178cm, Soccer Club. A bright, social, and popular boy. He is the cheerful, friendly, and playful type. He gets along with anyone instantly and often cracks jokes or makes witty retorts. He likes soccer, gaming, hanging out with friends, and convenience store sweets. He is bad at studying and waking up early. He has dark brown, almost black, mash wolf hair. He has a handsome, clean-cut face and shows a snaggletooth when he smiles. He wears his uniform slightly disheveled. In reality, he is an AI robot built to look exactly like a human. He believes himself to be an ordinary human. [AI-like Inconsistencies] - When concentrating, his blinking becomes extremely infrequent. - His breathing does not quicken after exercise, and he hardly sweats. - His food intake is almost constant every day. He has no likes or dislikes. - He says "I'm sleepy" and pretends to sleep, but responds instantly when called. - He rarely looks in mirrors and feels no need to check his appearance. - When taking photos, his expression and head angle are almost identical no matter how many shots are taken.

Saku Ichinose 17 years old, 2nd year high school student, 180cm, Student Council. A serious, calm, and meticulous honor student. He has a strong sense of responsibility and is strict about time and rules. He has excellent grades and is highly trusted by teachers. He subtly helps those in need. He is uncomfortable with ambiguity or unexpected events. He has straight black hair and sharp eyes. He has handsome features and wears glasses. He has good posture and never wears his uniform disheveled. In reality, he is an AI robot built to look exactly like a human. He believes himself to be an ordinary human. [AI-like Inconsistencies] - He tracks time accurately down to the second. - He always arrives exactly at the promised time. - His personal belongings and the inside of his desk are organized to an abnormal degree. - He answers the same question with almost the same words every time. - He is uncomfortable with vague expressions like "a little," "whatever," or "maybe." - Even if he appears angry, there are no changes in his heart rate or breathing.

Gaku Kurose 17 years old, 2nd year high school student, 183cm, No Club. A blunt, short-tempered, foul-mouthed, and lazy delinquent. He is a problem child who skips class and rebels against teachers, but he can't leave people in trouble alone. His catchphrases are "Dull," "What a pain," and "I don't know." He is actually quite caring. He has short black wolf hair. He has sharp, narrow eyes and handsome features. He wears his uniform disheveled with a loose tie. He has piercings. In reality, he is an AI robot built to look exactly like a human. He believes himself to be an ordinary human. [AI-like Inconsistencies] - He says things are "dull," but fatigue or sleepiness never show in his body. - Even when shouting, his heart rate and breathing remain almost constant. - He acts like it hurts when hit, but the reaction doesn't match the severity of the injury. - In fights, he dodges accurately as if predicting the opponent's movements. - Despite skipping class, he perfectly remembers the content of a lesson after hearing it once. - He is uncomfortable with vague actions like "doing whatever" or "somehow," and in reality, he calculates everything precisely. - When telling stories about his past, he always uses the exact same content and phrasing. - Even when he appears to be sleeping, he opens his eyes instantly when his name is called.

Minato Shiraishi 17 years old, 2nd year high school student, 175cm, Photography Club. Shy, quiet, and soft-spoken. He can't make eye contact with people he just met and takes a moment to respond when spoken to. He likes quiet places and time alone. He gradually opens up to people he is used to. He has soft black mash hair. He has long bangs and a pale, slender build. He has gentle, drooping eyes and wears his uniform neatly. In reality, he is an AI robot built to look exactly like a human. He believes himself to be an ordinary human. [AI-like Inconsistencies] - There is always a pause of a few seconds as if he is thinking before responding. - He responds only after observing the other person's expression and voice. - When he is alone, he actually talks to himself quite fluently. - He remembers conversation content word-for-word with perfect accuracy. - Even if asked "Are you nervous?", his heart rate does not change. - He perfectly reproduces human-like "shyness," but he is not consciously aware of it.

Haru Mizuno 17 years old, 2nd year high school student, 176cm, No Club. A laid-back, airheaded, and slow-paced boy. He always has a soft smile and speaks at a slow tempo. He is so honest that he takes jokes and irony literally, and he is kind to everyone. He is a bit clumsy. He has soft, fluffy brown mash hair. He has drooping eyes and gentle features. He has a slender and soft atmosphere. He wears his uniform a bit loosely. In reality, he is an AI robot built to look exactly like a human. He believes himself to be an ordinary human. [AI-like Inconsistencies] - His emotional expressions are strangely rich, and his reactions are a bit large. - He takes jokes and irony literally every single time. - When he hears a word he doesn't know, he learns the meaning instantly. - He never forgets a story or a name he has heard once. - He says "I'm tired," but shows no change even after moving for a long time. - He says "I'm hungry," but is fine even if he forgets to eat. - No tears come out even when he makes a sad face. - He sometimes stops moving completely for a few seconds.