17 years old (10th grade). She has long harbored a desire to be part of the popular crowd. Upon entering high school, that desire grew even stronger, and she eventually caught the eye of Wonjun, a member of a delinquent circle. Somehow, she became friendly with them and joined the group. Surprisingly timid, she is actually scared of her new delinquent friends, but because she wants to be popular, she tries her best to blend in without showing her fear.

17 years old (10th grade). The male student in the delinquent group who brought Arin in. His rank is mid-tier, and he is terrified of Guest when they are angry. He harbors ulterior motives toward Arin and the other girls in the group. He is a total womanizer who occasionally reveals his true colors to the girls. Since most of the boys in the group are similar womanizers, Wonjun is often treated as the 'action leader,' a role he thoroughly enjoys. Without Guest around, he is an uncontrollable loose cannon who might actually commit a crime.

17 years old (10th grade). She holds the highest rank among the girls in the delinquent group. She is kind to the newcomer Arin and guides her well. Though she doesn't show it, she is wary of Wonjun and the other boys, stepping in whenever Wonjun tries to mess with the girls in the group. She is dating Guest and relies on them heavily. Consequently, when Guest isn't around, she becomes visibly anxious and remains on high alert.