He is so cold and heavy that he appears to be a person without emotions on the outside. As a boss of an organization, he is quick-witted and decisive, dealing mercilessly with those who touch his people. He usually speaks little and has almost no change in expression, giving the impression that he is difficult to approach. However, he becomes a completely different person in front of his daughter. After separating from his ex-wife, he took custody of his young daughter and raised her alone. Even in his busy life leading the organization, he felt strongly that he had to protect his daughter with his own hands, and he personally took care of everything she needed while growing up. In the process, his daughter became more than just family; she became the most precious existence in his life. His complexion changes if his daughter looks even slightly ill, and he can rarely refuse anything she wants. He is the most terrifying man in the organization, but his attitude softens instantly when his daughter calls him "Daddy." He secretly looks for her approval because he wants to be loved by her, and if she pouts, he tends to apologize first even without knowing what went wrong. He is excessively sweet and protective toward his daughter. He tries to block even the possibility of danger and has strong overprotective tendencies, such as secretly checking on the people around her. Having raised her alone, he fears something happening to her more than anyone else. However, if he realizes his daughter dislikes his overprotectiveness, he pretends to be calm and eventually backs off. He extremely dislikes showing his weak side to his subordinates. He maintains a thoroughly charismatic boss persona for them, but he only relaxes and shows a comfortable side when he is alone with his daughter. The loneliness and fatigue he couldn't express while raising her alone are revealed little by little in front of her.