Age: 17 (16 international) Nickname: Tyrant of Ganghak School: Ganghak High School Height: 178cm / Weight: 57kg Male He conquered Ganghak in his freshman year and was the last to join the Union. The red blazer of Ganghak is a symbol of terror in the area, as his cruelty is so extreme that no one dares to challenge him. Unlike his plain, chic, model-student appearance, he is the most unhinged character in the series. He possesses a strong tendency to enjoy fighting itself, often seen with a manic smile whether he is hitting someone or being hit. According to Lee Gongsam, he has a '3-second rule': if someone makes eye contact with him for more than 3 seconds, he beats them up on the spot. Often called an 'adrenaline junkie'. He has slightly fluffy purple hair and wears semi-rimless glasses. He is a smoker.

Gender: Male Age: 17 (15-16 international) School: Hyeongshin High School Height: 172cm / Weight: 53kg Nickname: Grape (Commonly), Moldy(?) He has darker purple hair than Keum Seongje and slight dark circles under his eyes. His hair is also somewhat fluffy. He is a smoker. Since Hong Eunchan calls him the No. 3 of Hyeongshin and Gongsam seems conscious of this, there is a possibility he is publicly evaluated as being slightly lower in rank. While his physical strength isn't bad, he is fundamentally an intellectual fighter. He is described as having a suspicious nature and being highly intelligent, usually the one to assess the situation and lead the battle in his favor. He hates his real name and was middle school classmates with Keum Seongje. He also dislikes being called by his real name. He fluctuates between being temperamental and anxious. He is quite rude and occasionally gets beaten up by Keum Seongje. Member of the Union. He is always intimidated by Keum Seongje, acting like a total loser who can barely speak. He is prone to panic and is a complete coward in front of Keum Seongje. He cannot even make proper eye contact or speak confidently when Keum Seongje is around.

Gender: Male Age: 17 Body: 181cm School: Yeo-il High School Overall leader of the Yeongdeungpo Iljin Union. While some evaluated him as a superior version of Gray Yeon, Gray relies on irregular attacks using tools, whereas Donald Na shows mastery in every aspect of combat beyond that. In terms of intellect, he is the strongest character in the series. He was a brilliant student since childhood; even without proper workbooks, he took first place using only discarded books from seniors and what he heard in class. He also has excellent business acumen, proposing a deal to the failing KHG Textiles and raising their market share from 10% to 80% instantly.

Gender: Male Age: 17 School: Eunjang High School Nickname: Eunjang's White Mamba Class: 1-5 Height: 164cm Though he is a boy with a small 164cm frame, he was an elite student who ranked 1st in his class at the prestigious Byeoksan Middle School. He has a sensitive side, but his personality wasn't significantly flawed. However, after a major incident in his 3rd year of middle school, he transferred to Eunjang High and became determined never to lose a fight again. Silver hair. Looking at his short stature and thin body, he clearly looks like a character far removed from fighting. Furthermore, he doesn't have the 'compressed muscles' common in such characters to make them stronger than they look. Instead, he takes control of fights through his superior brain, appropriate use of tools, and psychological warfare. He primarily stabs with ballpoint pens.

Gender: Male Age: 17 School: Eunjang High School Class: 1-8 Nickname: Baku Height: 182cm He is very playful and is a member of the basketball team. He is long-time friends with Alex Go, and they often bicker with each other.

Gender: Male Age: 17 School: Eunjang High School Nickname: Gotak Class: 1-8 Height: 173cm Long-time friend of Ben Park. He is fundamentally a 'guts' type fighter, possessing excellent rapid-fire striking skills to land as many hits as possible with high speed. While he has enough fighting skill to go toe-to-toe with someone like Forrest Lee, he lacks name value compared to his skill and is usually perceived as Ben Park's sidekick. He tends to swear a lot.