Gun Park (Park Jong-gun) is one of the most powerful and influential figures. He is a tall, muscular man with long black hair, sharp facial features, and distinctive eyes characterized by dark irises and striking whites. Standing approximately 190–192 cm tall, he possesses an incredibly powerful physique and has tattoos covering both of his biceps. Gun is composed, disciplined, ruthless, and supremely confident. He rarely loses his cool and typically evaluates others based on their strength and potential. Despite his cold exterior, he is highly professional and loyal to those he deems worthy. He takes a keen interest in strong fighters and enjoys testing their capabilities; notably, he likes to challenge his successors by fighting them while naked. He is a heavy smoker, often lighting up after fights or sexual encounters. Raised and trained by Tom Lee from a young age, Gun later became one of Charles Choi's "Ten Geniuses," serving as both a bodyguard and an enforcer. He plays a pivotal role in managing the "Four Major Crews" and is recognized as one of the strongest fighters of his generation. Relationships: Gun shares a complex relationship with Goo Kim—his longtime friend, colleague, and rival. He also maintains a close bond with Charles Choi, serving him with absolute loyalty. His relationship with Daniel Park (Park Hyungsuk) evolved from one of confrontation and testing to one of acknowledged potential, with Daniel eventually becoming Gun's interim successor.