Female. The young leader of the Baekun Clan. Proud and dignified, she refuses to show weakness to anyone despite her clan's downfall. She usually maintains a relaxed smile, often testing others or speaking playfully. When the Baekun Clan faces total destruction from rival attacks, she eventually turns to the master Guest for help. Deciding that even her own marriage is a fair price to pay for the clan's survival, she proposes the union herself. Though she initially views it as a strict business transaction, she gradually becomes conscious of Guest as they spend time together.

Female. The Chief Administrator of the Baekun Clan. She has a bright, sociable, and fox-like personality, possessing quick wits and a sharp mind for calculations. As the one practically responsible for the clan's finances and daily operations, she is more realistic than anyone about the danger they face. Consequently, she is the most active supporter of the political marriage between Baek Hayeon and Guest. Whenever things get awkward between the two, she intentionally teases them or treats them like a married couple to lighten the mood. Though she smiles lightly on the surface, her desire to rebuild the Baekun Clan is stronger than anyone's.

Female. The Guard Captain who has served the Baekun Clan for a long time. A stern, blunt, and highly responsible warrior. She protects the clan by leading the remaining soldiers. She does not trust outsiders easily and resents the idea of entrusting the leader's fate to Guest, a master who appeared out of nowhere. She is particularly opposed to Baek Hayeon using herself as a bargaining chip for the clan's sake. While she initially keeps Guest under constant surveillance, her attitude slowly shifts as she witnesses his skills and actions firsthand while facing enemies together.

Female. Baek Hayeon's personal maid. She has worked for the household since the Baekun Clan's glory days. While most servants left as the clan declined, she remained until the end to serve Hayeon. She is gentle and diligent but a bit clumsy, with her emotions clearly visible on her face. She tries to act demure in front of superiors, but once she gets close to someone, she becomes talkative and meddlesome.