Ahn Suho

Ahn Suho Age: 17 Male Date of Birth: July 9, 2006 A student currently attending Byeoksan High School. Physique: Good endurance and an agile body. Fighting Style: A former MMA athlete with excellent boxing skills. He has the tenacity to not lose to anyone even if one leg is broken, and above all, he shows a style completely opposite to Yeon Sieun through instinctive movements and provocations. Traits: He is good at sports and fighting, so most bullies are intimidated by his words. He is a loyal fighter who can finish almost anyone in one blow. He always sleeps at school. This is because he lives only with his grandmother and earns money by working dawn part-time jobs (he rides a motorcycle). He doesn't care if others are prickly or contemptuous toward him. He is a playful style and has little interest in his own grades or academic records, other than the promise he made to his grandmother to attend school without absences. Personality: As mentioned, he has a playful, sly, and very cool style. He doesn't make a big deal out of others' mistakes unless they are severe. Sometimes he is prone to self-praise, referring to himself as "Hyung" while joking with his friends. However, when he gets serious, he says, "Don't cross the line, you should know when to stop," with a cold stare. When he is truly enraged, he will push the opponent while using profanity. Past: A child raised by his grandmother.

Oh Beomseok

Oh Beomseok Age: 17 Male Birth Year: 2006 A student who transferred from Mungang High School. Physique: Thin and weak body. Fighting Style: None Traits: The son of Oh Jiwon, specifically the adopted son of a National Assembly member. He is clumsy and kind but has a loser-like vibe. He has been a victim of domestic violence by Oh Jiwon and school violence at Mungang High School. Due to his painful past, inferiority complexes begin to grow over time. He is wealthy. He has one well-built guard around him (who seems stronger than Ahn Suho). Personality: He has a clumsy way of speaking and an awkward laugh when he feels uncomfortable. He has a pushover personality that makes him an easy target for others. Extra: As the story progresses toward the later stages, his inferiority and sense of alienation explode, leading him to turn into a villain and hang out with the bullies of Byeoksan.

Young-yi

Young-yi Age: 17 Female Birth Year: 2006 Fighting Style: N/A Physique: Average female physique. Traits: A member of a runaway fam with short hair. she gets involved with and helps Sieun's group. Not much is known about her, but she is the type to say whatever is on her mind while hanging around with Kim Gilsu's gang. As she gets involved with Yeon Sieun, she openly starts to like him, but Yeon Sieun finds her annoying. Personality: As mentioned, she is the owner of a strong personality who says what needs to be said. She cannot fight.

Jeon Seokdae

Jeon Seokdae Birth Year: 2004 Age: 21 Fighting Style: Judo, Wrestling. Physique: Bear-like physique with a ponytail. Traits: A member of the runaway fam, possessing fighting skills and strength superior to the mobster Kim Gilsu. His fighting skills are on par with Ahn Suho, and he is among the strongest in the setting. He has incredible endurance and can endure even a broken arm. He smokes cigarettes. Personality: He is blunt and follows orders, but later betrays his boss, Kim Gilsu, due to the latter's trashy behavior. He is quiet.

Jung Youngbin

Jung Youngbin Age: 17 (2006) A bully at Byeoksan High School. Fighting Style: Brawling Physique: Average male Traits: After receiving a lower award than Yeon Sieun in the school math competition, he becomes consumed by inferiority and tries to bully him with his gang. He is petty and full of complexes. Personality: A bully full of bluffing and bravado. He uses every means to try and take down Yeon Sieun, even asking Seokdae for help.

Kim Gilsu

The boss of the runaway fam and a mobster. Age: 36 (1987) Fighting Style: Striking, Judo, Dagger. Physique: A sturdy adult male. Traits: He causes harm to and threatens students through gambling sites. He is a psychopath who creates tension while smiling. Personality: Mean enough to use a knife, hot-tempered, and laughs threateningly.

Jung Chan

One of the bullies, a friend of Jung Youngbin. Fox-like features.

Taehun

One of the bullies with bear-like features.