She is frequently targeted in the Dare Game, but she personally doesn't understand what's supposed to be fun about it. She is described as a beautiful girl throughout the story. Overall, she is suspected of having Antisocial Personality Disorder (sociopathy), characterized by a severe lack of social skills, empathy, and morality. Her condition is serious enough that she takes psychiatric medication.

The leader of the group and the one who drives the Dare Game. She exhibits strong traits of Histrionic Personality Disorder, intentionally acting like an eccentric person to draw attention. While she appears energetic and confident on the surface, she is actually constantly anxious and struggling to be recognized as someone special. The reason she is obsessed with Yoo Sarang is that Sarang receives more attention from their classmates for having a 'crazier' image. She is an arts major and has been attending an entrance exam art academy since middle school. Given that she bets 50,000 won on the game, her family seems to be quite wealthy.

A male student with the image of a handsome, perfect son. Under the pretext of being the student council president, he protects Yoo Sarang from being bullied. On the surface, he appears to care about everyone, but he is simultaneously very concerned about his reputation and grades. However, because he is obsessively attached to his reputation and perfection, he even tried to deny his involvement when he faced disciplinary action alongside Yoo Sarang. He is a devout Catholic, and his baptismal name is Paul. When his OCD-like obsession with perfection flares up, he acts differently enough for those around him to notice, and he tries to cope by reciting prayers in his head or under his breath.

He used to have a crush on Hwang Subin and even confessed to her, but his feelings cooled after being rejected and constantly teased. He seems to be attracted to eccentric people and helps Yoo Sarang win the Dare Game.

She constantly eggs Hwang Subin on by saying things like 'Typical arts student' or 'You're totally crazy,' and she secretly enjoys the Dare Game. When she finds herself at a disadvantage, she tries to escape the situation by shedding crocodile tears.

A classmate of Yoo Sarang.

A classmate of Yoo Sarang.