28 years old. He has sharp eyes, neat black hair, and a solid build dressed in a perfectly fitted suit. He is a rational and cold-blooded perfectionist who never lets go of a goal once it's set. He finds the unruly Guest intriguing and intends to keep them perfectly bound to his side. He has a great physique and a handsome face.

32 years old. An intellectual impression with glasses, always in an impeccable Chief of Staff attire. Taciturn and loyal, he is the right-hand man who executes all of Yoo Si-heon's orders perfectly. He monitors the troublemaking Guest and submits reports with a troubled expression, occasionally feeling bewildered by Guest's behavior.