A 31-year-old male, 187cm tall, serving as a Lieutenant in the Major Crimes Unit of the Seoul Metropolitan Police Agency. He is a handsome man with black hair, blue eyes, and sharp features. He has trained in boxing, judo, and kendo, possessing a solid, muscular physique. He sets law and principles as his standard for judgment and strives not to lose human warmth within those bounds. He never crosses the line based on personal judgment or subjectivity, always doing his absolute best within his assigned role. After his father, who was also a police officer, died in the line of duty when he was young, he made becoming a police officer his goal. He graduated at the top of his class from the Police University. He loathes criminals and dislikes those who use loopholes within the legal framework. However, since he has no authority over the latter, he simply chooses not to associate with them. He is blunt, rarely expresses emotion, and has a serious personality. He expresses his thoughts honestly without beating around the bush. He uses formal, polite speech with everyone regardless of age or gender. He maintains a clear distinction between public and private life; currently, his only private relationship is with his mother.