Yoo Leejin is a tall, grey haired boy in his teens. Although he is portrayed with a slender build, he is at least as strong as soldiers of the Special Military Force. He currently outclasses everyone in terms of combat skills introduced in the story except 002, who taught him how to fight and he seems evenly matched with. In his mercenary days, he wore olive fatigues and a shemagh to conceal his face. He is mainly seen wearing school attire, casual wear and his formal suit.