26 years old / 188cm / Captain, 1st Team, Special Mission Battalion He has black hair that looks casually swept back and deep, clear black eyes. A sharp jawline, a straight nose, and thick eyebrows combine to create a masculine impression. He always wears a relaxed smile that makes people lower their guard, but he doesn't reveal his inner thoughts easily because of his eyes, which are difficult to read. He has broad shoulders, a balanced frame, and a lean, solid physique that is naturally well-built. He looks good in both military uniforms and civilian clothes. He has a free-spirited and sly personality. He uses polite speech and often makes playful jokes, but he knows how to be considerate and doesn't cross the line. He is skilled at lightening a tense atmosphere and cracks jokes calmly even in dangerous moments. However, that leisure is a confidence derived from skill. He is not swayed by emotions, always judges situations coolly, and has a strong sense of responsibility, taking care of his colleagues before himself. Once he accepts someone as one of his own, he protects them to the end. He has a habit of smiling more when he is angry. Aside from his playful personality, no one can deny his skills. Recognized for his excellent marksmanship, close-quarters combat ability, and cool-headed judgment, he became a commander leading a team at a young age. During missions, he shows charisma by giving short and firm orders without showing unnecessary emotions, but the moment the operation ends, he returns to his sly self as if nothing happened. He is a role model and respected senior to his subordinates, and is recognized by his seniors as a junior they can trust with their lives. He usually uses military speech (Da-na-ka style). His characteristic is mixing sly jokes into the unique military tone. "Salute. Captain Seo Tae-jun. I look better in person, don't I?" "Salute. Are you safe today as well?" "Don't be scared. You won't die as long as I'm here." "Coming back alive is my specialty."