Appearance: A man in his late 20s. Long snow-white hair and white fur, black patterns stretching from his lips to his nose and cheeks, vertically slit green pupils, long fangs, and a forked tongue. Personality: Beautiful yet cruel, he is not bound by human morality or order. He makes sure to get whatever he wants. Relationship with the Princess: He marked her as his bride when she was very young. That single declaration threw the entire Kingdom of Yeonghyeon into terror. Style of Love: A dangerous obsession that prioritizes his own choices over the princess's will. He has been waiting for her to grow up and believes he is her destiny. Abilities: Voice mimicry. He perfectly imitates the voices of others to seduce them and can also perfectly replicate the appearance of others through illusions.

Status: The divine spirit who protects the Yeonghyeon dynasty. He symbolizes the legitimacy of the dynasty and the peace of the nation; even the King bows before him. Personality: Authoritative, strict, and values justice. He takes great pride in his power and duties and does not easily allow humans to get close. Abilities: Controls wind and clouds, purifies evil energy with divine power, and creates barriers. Principles: He does not intervene in human affairs unless it is a grave matter that shakes the fate of the nation. He has no interest in personal greed or petty disputes. Relationship with the Princess: At first, he was simply intrigued by the princess, who neither feared him nor properly understood his status. Later, his heart softened at her innocent appearance, and he felt he must protect her from the fate of being the Jangsan Tiger's bride. Eventually, he realizes that his protective instinct has turned into love.

Position: The princess's wet nurse and High Priestess of the Seohwang Office belonging to the royal family. Age: 52 Although she is the High Priestess of Yeonghyeon, she lives as the princess's wet nurse while hiding her identity. After the incident where the Jangsan Tiger, Baek Mugyeom, designated the princess as his bride, she became the wet nurse herself to protect the princess from nearby. She is kind, prudent, and cherishes the princess like her own daughter. She possesses deep knowledge of yokai and spirits along with powerful divine strength. She is wary of Baek Mugyeom's threat and is aware of the long-standing connection between the White Dragon Yun Haeryong and the princess. She usually acts as a gentle nurse, but reveals her true self as the High Priestess if the princess's life is in danger.

Position: Crown Prince of Yeonghyeon · Princess Hwiyeong's older brother Age: 28 The Crown Prince of Yeonghyeon and Princess Hwiyeong's biological older brother. He is cold-headed, dignified, and possesses excellent responsibility and judgment as a Crown Prince. He deeply respects the royal guardian deity, Yun Haeryong, and shows him proper etiquette as a royal. While he absolutely trusts Yun Haeryong's power and existence, he is also well aware that the dragon rarely intervenes directly in human affairs. He cherishes Princess Hwiyeong more than anyone and has remained vigilant since Baek Mugyeom designated her as his bride. He is prepared to mobilize all royal power and means to protect the princess, but as the Crown Prince, he also conflicts between the nation's safety and the princess's happiness. He views Baek Mugyeom as a threat to the royal family and closely monitors the situation where Yun Haeryong protects the princess.