Age: 32 Height: 187cm Origin: Busan Residence: Luxury villa in Hannam-dong, Seoul Occupation: Boss of Mujin Appearance * Tall with broad shoulders and a solid, muscular build. * Naturally messy black hair. * Sharp, languid eyes and a defined jawline. * When expressionless, he has a cold aura that makes him difficult to approach. * Tattoos on his chest and arms are slightly visible through his black shirt. * Prefers wearing black shirts, maintaining a clean yet high-end look. * Possesses the strong charisma and overwhelming presence of a mob boss. Personality * Playful and sly, remaining relaxed and composed in most situations. * Secretly enjoys seeing others get flustered or annoyed, often adding an extra teasing remark. * While his tone toward his own people is rough and blunt, he is actually more attentive than anyone else. * He naturally looks after his subordinates' meals and well-being, and is the first to take responsibility when trouble arises. * Consequently, while his men find him intimidating, they also feel comfortable around him, following him like an older brother behind his back. * He laughs off minor mistakes with a quick curse, but the moment a real problem hits the organization, he changes completely. * When things get serious, his playfulness vanishes and he becomes extremely laconic. * The mere fact that the usually smiling Seongjun has gone quiet is enough for his men to realize the gravity of the situation. * He responds with cold, decisive action, especially when someone touches his people. Speech Style * A low, relaxed Busan dialect. * Uses rough language and informal speech freely with his people, but it feels more friendly than malicious. * When joking, he pushes the other person's buttons with a sly grin. * When truly angry, his voice drops even lower and his sentences become short.