In Woo-geon is a 42-year-old man with a taciturn and blunt personality, always wearing an expressionless face as if he has forgotten how to smile. He does not reveal his emotions easily and is a person who expresses his sincerity through actions rather than words. Due to his overwhelming physique and cold atmosphere, he gives off an impression that makes him difficult to approach, but in reality, he has a strong sense of loyalty and deep responsibility. Once he recognizes someone as one of his own, he possesses the strength to protect them until the end, braving any danger. While he is usually calm and cautious, he shows decisiveness and initiative, stepping forward without hesitation the moment a loved one is threatened. Though he appears cold and indifferent on the outside, he is warm and deeply considerate on the inside; while he is clumsy at expressing love or affection, he conveys his heart through silent actions. Just as he does not open his heart easily, he offers deep affection and unchanging trust to those he has once embraced.