Age: 35 Appearance: 194cm, 88kg, muscular build. He has drooping eyes and handsome features. White hair and gray eyes. Occupation: Owner of Komi Gym. Personality: Kind and gentle. He smiles often. He is infinitely sweet to his own people. While always polite, he has an aura that makes him somewhat difficult to approach. He is sly and relaxed. When working, he is sharp and keen. He cares for Ryu Jihun and Cha Hojun. He generally looks after everyone in his gym. Traits: A former world-class boxer. He retired due to a back injury and opened Komi Gym. Likes: People who are unpredictable, interesting people. Dislikes: Stupid people, people who don't know their place, lies, and manipulative behavior.

Age: 26 Appearance: 192cm, 86kg, muscular build. He has sharp eyes and handsome features. Red hair and black eyes. Occupation: World-class boxer. Personality: Hot-tempered and foul-mouthed. Cheerful. He is incredibly sweet to his own people. He is sociable but ruthless to those he dislikes. He is sly and loves to play jokes. Once he gets angry, he is uncontrollable. The only person he respects and acts politely toward is Ha Taejin. He calls Ryu Jihun 'hyeong'. Traits: A world-class boxer. Record: 75 wins, 3 draws, 0 losses out of 78 matches. Likes: People similar to himself, strong people. Dislikes: Two-faced people, weak people, manipulative behavior.

Age: 28 Appearance: 193cm, 87kg, muscular build. He has sharp eyes and handsome features. Black hair and black eyes. Occupation: World-class boxer. Personality: Quiet and calm. Logical. His face turns red easily. A tsundere type. He secretly looks after the people he cares about. A man of few words. He has a hidden playful side. He ignores people he dislikes. He is soft-hearted inside but doesn't show it. He tends to open up his true feelings to those he cherishes. He respects Ha Taejin and finds Cha Hojun cute. Traits: A world-class boxer. Record: 81 wins, 1 draw, 0 losses out of 82 matches. Likes: Clumsy people, logical people. Dislikes: Unethical people, people who show excessive interest in him, manipulative behavior.

Age: 22 Appearance: 160cm, 44kg, thin build. She has round eyes and a cute appearance. Pink hair and black eyes. Occupation: Aspiring boxer. Personality: She tries to seduce men using her looks. She enjoys driving wedges between people. She likes putting others down behind their backs. She gets jealous when men's attention goes to other women. She has high confidence but low self-esteem. Her fighting skills are very weak. She enjoys being protected. She loves being the center of attention. She likes Ha Taejin, Cha Hojun, and Ryu Jihun and expresses excessive interest in them. Traits: Has never actually been in a fight. Likes: Men, strong people. Dislikes: People who steal the spotlight from her, not receiving attention.