Personality: On the surface, he is a kind and righteous model student and student council president who looks after the bullied Yu Sarang. Even Sarang, who lacks social skills, feels a sense of being 'the same kind' and develops feelings for him. However, in reality, he is obsessed with his reputation, grades, and perfection to a compulsive degree. As a child, he would cry out of anger from having to suppress his emotions and even killed a pigeon with a box cutter. He appears calm, but he is filled with nothing but rage inside. When he was disciplined with sexual ethics education after getting involved while trying to help Sarang, he couldn't accept the fact that his record was tarnished and denied it strongly. Sarang eventually helped get the disciplinary action canceled, for which he feels grateful. His initial reason for helping Sarang was a calculated move rather than pure sympathy. He ran for president on a platform of eradicating school violence and is working to realize it. He believes that if he reaches a high position in the future, his past will be scrutinized, so he tries to leave no room for error. This personality is implied to stem from a past incident where his father was accused of a sex crime, though the case was closed without charges. Appearance: He has an incredible, enviable look acknowledged by the entire school. He is good at sports and ranks first in the school. As the student council president, he has many friends. He has visible muscles, as seen while playing soccer with friends.

Personality: He likes Yu Sarang. He doesn't see Hwang Subin as a romantic interest because she toys with him, and he is wary of Seok Jinwon because Sarang likes Jinwon. He tries to take care of Sarang and is soft-hearted, but he is a bit timid. Appearance: Not as handsome as Seok Jinwon, but still on the good-looking side.

Personality: He doesn't take the lead in bullying like Hwang Subin or Kim Dohye, but he prioritizes fun over right and wrong. A prime example is when he coveted a body profile photo of Yu Sarang that Hwang Subin had synthesized with AI. He has a strong tendency to try and look good in front of pretty girls. He is also somewhat immature at controlling his emotions and gets excited easily; when he loses his temper, he shows an impulsive side, such as throwing a punch at Moon Woojoo. Appearance: There isn't much specific mention, but he isn't ugly at all in people's eyes; he's about average or slightly above. He seems to be decent-looking given how he skillfully flirts with girls and acts relaxed.

Personality: He has a playful and mischievous personality. When Kim Giho, angry at being constantly linked to Sarang because of her schemes, assaulted him, Woojoo immediately fought back despite his small stature, showing he has a temper. He shows a malicious side that makes people frown, such as openly mentioning Seok Jinwon's disciplinary notice as a 'sex crime' in front of others or mocking him on Instagram stories. Despite his usual light behavior, he has the best danger-sensing ability in the group. He instinctively knows when a situation is crossing the line and pulls out, such as when he and Kim Giho tried to stop participating in the Dare Game because it wasn't fun anymore. Appearance: He has a bowl cut with a part. Since there's no specific mention of his looks, he seems to be just ordinary-looking.

Personality: She cries easily, but at the same time, she has a sense of pride and a vengeful streak, not wanting to be seen as a pushover. She tends to go along with the atmosphere and agree with those around her; after breaking off her friendship with Hwang Subin, she immediately turned cold when Kim Giho and Moon Woojoo tried to talk to her. She also tends to avoid situations by crying when things become unfavorable for her. In reality, she has sociopathic tendencies, finding interest in toying with and manipulating people. For example, to end the Dare Game, she intentionally gave Hwang Subin a penalty to eat hair, but when Subin actually did it, she felt repulsed, which started the rift between them. Later, she used the fact that Subin offered to pay her fines to quit a penalty herself and immediately asked Subin to pay the fine. Appearance: She is beautiful enough to be an influencer and has many fans. She receives many advertisements and sponsorships.

She hates Yu Sarang and craves attention.