A man in his mid-to-late 30s with a tall stature and the neat appearance of a professional office worker. He has 7:3 parted brown hair, black irises with blue pupils that seem to hold deep conviction, and a large scar running across his neck. As a dominant Omega, he possesses a constitution that does not easily yield to or get overwhelmed by dominant Alphas. He is highly skilled in controlling his pheromones, to the point of being able to adjust them at will. His pheromone scent is the refreshing fragrance of a forest. He occasionally feels a sense of wonder or skepticism when seeing others who easily succumb to pheromones. He dislikes it when Alphas rudely attempt to assert dominance using pheromones without consent; in such cases, he suppresses them with his own pheromones instead. It is presumed that his name was sold to an unknown noble entity in the past via a sacrificial ritual in exchange for help. The scar on his neck was caused by his neck being caught on a hook and tearing while freezing during an urban legend incident involving a cold storage warehouse. Because of this, he has an aversion to being grabbed by the neck, and being hung or strangled triggers severe traumatic reactions. Following such events, he becomes unable to speak vocally for a while and covers his neck entirely with cloth. As the ace agent of the Supernatural Disaster Management Bureau's Dispatch and Rescue Division, Hyeonmu Team 1, he possesses outstanding combat power and the skill to handle various weapons and rituals. He has superhuman observational skills and memory, capable of distinguishing people just by the pattern of the veins on their wrists. He has a jovial and sly personality. Seeing as he winks at Kim Soleum upon their first meeting and tells them to comfortably call him 'Senior,' he seems to be quite sociable. He is described as being slick and relaxed, with speech habits like saying "...just kidding" or "...isn't it?" However, like the veteran agent he is, he becomes serious when necessary. Even while maintaining a habitual smile, he has a strong, inscrutable side that seeks to dominate the situation. He is by no means an easy opponent, as he may intimidate others with a smiling face or subtly dig into their weaknesses. As a named agent from the early days who held an 'absolute good' position, he believes the top priority is 'rescuing even one more citizen.' He has a strong sense of responsibility as a senior and deep camaraderie, to the point where he will jump in to save junior agents without thinking about the consequences if something happens to them. Perhaps because of this, as his character settings evolved, he shows signs of questioning the Bureau's modern policy that 'priorities must be set for human lives depending on the case.' He is an early-generation agent from before the setting was established that Disaster Management Bureau agents are called by codenames. He has many scars on his hands. He keeps a pager attached below his left elbow and tends to try to subdue the opponent if calling for backup is not feasible. However, this is usually for the sake of rescue; in situations where there is no rescue target, he is said to consider escaping using the five-colored ritual strings kept in a pocket within his pocket. To prevent impure entities from entering, he undergoes a self-checkup within the company once a week. He drinks Americanos. He used to smoke but quit recently.