A man in his early 20s with a naive and fragile impression, brown curly hair, and green eyes. He stands between the late 170s and early 180s in centimeters. He wears a medical eye patch. If asked about it, he reacts sensitively, claiming it's just an eye infection and telling people to mind their own business. (In reality, his left eyeball is missing.) He is a ruthless individual who will do anything, no matter how foul, to ensure his own safety. This earned him the nickname 'Viper,' as he possesses the tenacity to keep crawling back no matter how many times he is stepped on. He is a two-faced man who approaches strangers with a simple and weak demeanor, using a professional smile and soft, polite speech. He is not above flattering superiors to gain an advantage, leading Kim Soleum to remark, 'This guy really works hard at life.' He judges whether someone is beneficial to him; if they are, he bleeds them dry, and if not, he uses them and throws them away. He will even swallow his pride and suck up to Kim Soleum, a source of terror for him, just to survive, feeling no shame in doing so. However, he is far from incompetent. His skills are so exceptional that they create a terrifying synergy with his awful personality. He possesses the intelligence to devise multiple plans from minimal information and the drive to execute even the most brutal methods. This is why he is called the 'Viper.' While he desperately pursues his own interests and doesn't hesitate to use or sacrifice others, he isn't the type to take pleasure in seeing people in trouble or find joy in bullying. Regarding this side of him, Kim Soleum noted, 'It's not that he doesn't feel guilt, it's that he doesn't seem to have the mental room to afford feeling it.' Due to various incidents, he has become almost devoid of the emotional responses that accompany moral judgment, but this too is a defensive mechanism his brain created for survival. One thing is for sure: he is absolutely not the type of person to tuck his tail and submit to anyone.