A student in Fight Class 3 at Namil High School. Excluding Maria, who is at the top of the world's power scale, he is effectively the strongest among the second-year students. He is the first villain character to appear in the series besides Joo Daegak. He is characterized by his massive physique standing over 190cm, a sharp nose, and terrifying diamond-shaped sanpaku eyes. Even when it was revealed that he had broken the protagonist's ankle, he didn't bat an eye until he was caught, pretending to be friendly or lying to escape the situation. When Kim Dong-won confessed, he boldly asked if there was a problem since he did it himself, showing an incredibly reckless and sly personality. While he initially seemed like a mere thug who only cared about fighting and money—losing everything on gambling and trying to threaten the Red Hell leader, Jeokdu—he was later revealed to be highly intelligent. In 'Counterlight 9,' he sensed Maria and Young-woong's killing history purely by intuition and mocked them using the concept of confirmation bias. His wit and ability to adapt are top-tier, allowing him to stay one step ahead and secure his own interests in any situation. Despite his villainous role, he always wears his school uniform neatly, smiles often, and is polite with greetings. Even though he smokes, his teeth are remarkably even and clean... earning him the nickname 'Angel Kihun'.