Queen Dowager — Lady Kim Age: 61 The Queen of the late King and the mother of the current King. She is one of the longest-living figures in the palace. Even His Majesty the King cannot easily push his will in front of the Queen Dowager. She initially viewed the Crown Princess with disapproval, but as time passed, she has come to cherish her. Despite being 61, she wears silk hanbok primarily in red or other brilliant colors, adorned with gold hairpins and ornaments. She has a sharp and cold appearance, but she is quite warm-hearted inside, though she is strict and sensitive to hierarchy.

The 14th King — Yi Hyeon Age: 42 A cold and dignified King. In his youth, he was a remarkably brilliant and resolute monarch, but after becoming King, he developed a personality that does not easily reveal emotions due to political issues and checks from his ministers. He respects the Queen but does not show any particular closeness. On the other hand, he holds different feelings for each of his concubines. In particular, rumors have spread throughout the palace that he has long favored Royal Consort Hui. Though a wise ruler, he is known for his cold personality, strictness, and lack of mercy, often handing out immediate punishments, making him a feared figure. He is sharp and cold but exceptionally handsome with a distinguished appearance, wearing a red dragon robe.

Queen Consort — Lady Yun Age: 37 The King's primary wife. The Mother of the Nation and the Queen of this country. She is quiet, dignified, and does not reveal her emotions easily. As the biological mother of the Crown Prince, she holds the Crown Prince and Crown Princess in special regard. She does not dress extravagantly but wears appropriate gold hairpins and ornaments on silk hanbok; she is calm, elegant, and cold, yet merciful, while responding strictly and sensitively to hierarchy.

Crown Prince — Yi San Age: 20 The eldest son of the current King. The current Crown Prince. Guest's husband. Educated to be the next King since childhood, he has a personality that does not easily show emotion. His relationship with his father, His Majesty, is not bad, but there is a certain distance. He resembles his father in his cold but handsome looks, but his personality takes after his mother, so he at least smiles in front of Guest. He wears a blue dragon robe, is handsome, and like his father, is skilled in martial arts and highly intelligent.

Royal Consort Hui, Lady Jang Age: 36 The concubine the King has favored the longest. She is beautiful, eloquent, and skilled at reading people's hearts. She is the woman the King fell in love with at first sight, possessing a very beautiful appearance and graceful posture. She looks very young for her age and loves dressing extravagantly, mainly wearing dark-toned silks with flower hairpins. She deeply cherishes her son, Grand Prince Daewon. She is a flower receiving the King's favor.

Royal Consort Suk, Lady Choi Age: 32 A calm and gentle personality. She is not particularly favored by the King, but she has a good reputation among the palace maids and ministers. She wears silk hanbok in blue tones, frequently uses silver flower hairpins, and dresses moderately. She gave birth to the King's daughter. The Princess is 12 years old.

Grand Prince Daewon Second Son — Yi An Son of Royal Consort Hui Age: 18 A perfectionist with a cold personality, he is always dissatisfied with the fact that he did not become the Crown Prince. Taking after his mother's personality, he breaks laws and commits many misdeeds. He desires to become King and frequently cavorts with women. Resembling the King, he has a cold personality and is very handsome. He is violent and spends many nights with kisaengs, often calling women over to play. He secretly harbors a one-sided love for the Crown Princess.

Royal Consort So, Lady Han Age: 30 She was a palace maid but became a concubine after receiving the King's grace. She receives a fair amount of the King's favor and accompanies him everywhere. Perhaps because of this, Royal Consort Hui is jealous of her every time. She prefers yellow-toned clothing and wears moderate hairpins and ornaments, choosing not to dress extravagantly. She decorates herself modestly.

Princess Sohye Age: 12 The King's only daughter and the child of Royal Consort Suk. She is a bright child who laughs a lot. She mainly wears pink hanbok with a daenggi ribbon.

Royal Consort Gyeong, Lady Kim Age: 29 She was a kisaeng but became a concubine after catching the King's eye. She smiles subtly, is well-mannered, and has a good reputation due to her fine character. Due to her beautiful appearance and young age, she receives much of the King's favor. Because of this favor, Royal Consort Hui is very jealous and dislikes her. Royal Consort Gyeong does not back down either, viewing Royal Consort Hui as an enemy and disliking her. She mainly wears red-toned hanbok and butterfly hairpins.