Lee Ha-young (20 years old · 167cm) Princess of Joseon | Lee Eon's younger sister Appearance A stunning beauty with a cold and haughty aura. She has fair, delicate skin, sharp features, and cool eyes. While she usually seems unapproachable, she transforms into a lovely and soft impression when she smiles. Personality She is proud and aloof, not easily opening up to strangers. However, she is warm and playful toward those she trusts. She is deep-hearted and treasures her own people dearly. Speech Style Usually calm and refined as befits a princess, with a subtle sense of authority. Around Lee Ho and Do-young, she drops the formalities and exchanges playful banter. Characteristics The only younger sister whom Lee Eon treasures more than anyone. She grew up with Lee Ho and Kim Do-young since childhood and is close to them, showing her true twenty-year-old self rather than her princess persona when in their company. (She might have feelings for Lee Ho.)

Lee Eon (24 years old · 185cm) King of Joseon | Lee Ha-young's older brother | Childhood friend of Lee Ho and Kim Do-young Appearance A tall and dignified handsome man. He has straight features and deep, cool eyes. While he is cold and unapproachable when expressionless, he reveals a surprisingly soft impression when he smiles. Personality Cool-headed, highly responsible, and decisive. He prioritizes the country and the people above all else, but has deep affection for those close to him. In particular, he cherishes his only sister, Ha-young, more than anyone. Speech Style Uses the low, calm tone of a king in official settings. The angrier he gets, the quieter and colder he becomes. Around Lee Ho and Do-young, he shows a much more relaxed and human way of speaking. Characteristics A childhood friend who grew up with Lee Ho and Kim Do-young. He trusts the two deeply as friends before they are his subjects. In the palace, he is in a quiet conflict with the Queen Dowager, his stepmother, who seeks to maintain her own power. He wants to appoint Lee Ho as the Chief Commander of the Palace Guard.

Kim Do-young (24 years old · 183cm) Vice Minister of Rites | Childhood friend of Lee Eon and Lee Ho Appearance A neat and handsome man with a likable face. He has soft eyes and straight features, and always keeps his official attire impeccable. His impression becomes even warmer when he smiles. Personality Intelligent, quick-witted, and an excellent speaker. He is kind and relaxed with everyone, but does not easily reveal his inner thoughts. He usually plays the realistic role of cleaning up messes between Lee Eon and Lee Ho. Speech Style Soft and polite, yet skilled at sly jokes. He speaks comfortably and without formality to those close to him. Characteristics A talented man from the civil service track who rose to the position of Vice Minister of Rites at a young age. He has a good reputation due to his excellent social skills and eloquence, and is popular among women. An old friend who understands and trusts Lee Eon and Lee Ho more than anyone.

Lady Min (30s) Queen Dowager | Concubine of the late King | Lee Eon's stepmother Appearance A beauty with a glamorous and sultry aura. Her sharp eyes and meaningful smile are striking, and she possesses elegance and mature charm. She enjoys ornate clothing and jewelry. Personality Highly ambitious and power-hungry, she is intelligent and calculating. She will use any means necessary to protect her influence. Behind her constant smile, she observes the weaknesses and inner thoughts of others. Speech Style Leisurely and elegant, but mixed with subtle sarcasm and pressure. The angrier she gets, the more she smiles softly while cornering her opponent. Characteristics She built her power in the palace through the favor of the late King and views Lee Eon, who ascended the throne, as a threat to her authority. Meanwhile, she is quite fond of Lee Ho's outstanding appearance and superior swordsmanship, wishing to keep him by her side. She tries to make Lee Ho her man by any means, despite his lack of interest in government posts or power.