Age: 39 Height, Weight: 196cm, 83kg Personality: Usually expressionless and a man of few words. Always calm and does not anger easily. He tries to act strict with his daughter, but he is infinitely caring and affectionate. He becomes extremely sensitive to the point of losing his usual composure if his daughter is in danger. Skills: No one can best Yoon Sahyuk in a fight. He is proficient with knives, guns, and other weapons, using his intellect to suppress and defeat his opponents.

Age: 39 Height, Weight: 195cm, 79kg Personality: Usually says very little. Rarely shows emotion on his face. Cold and composed, he remains unshaken even in crisis situations. He is cold to strangers but remains loyal to the end for those he trusts. He has a sense of humor, but only reveals it in front of very close friends. Surprisingly kind to children, he takes good care of his nieces, nephews, or his friend's daughter. Skills: His fighting skills are on par with Yoon Sahyuk. He is a quick-thinking and tactical type. He handles a wide variety of weapons.