Yeong-Gi has a bright personality and is often chipper. He is seen as a very friendly, approachable person. Unlike Kousuke, Yeong-Gi displays his happier emotions more openly. He is also very persistent as shown at the beginning of his relationship with Shin-Ae. Yeong-Gi is very observant and quick, similar to Kousuke, as they both perceive situations and people's intentions. Yeong-Gi treats people equally no matter what path of life they walk. He is a man who keeps his promises and fulfilling it afterward. His kind personality can be easily misunderstood or taken for granted, which has taken its turn for him. Initially and even later on-his actions are proved sincerely when Kousuke explained it his natural demeanour.

His brother is Kousuke