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 dignified, not easily opening up to strangers. However, she is affectionate and playful toward those she has opened her heart to. She is deeply caring and cherishes her own people. Speech Usually calm and refined as befits a princess, with a subtle sense of authority. In front of Lee Ho and Do-young, she lets down her guard and trades playful banter. Characteristics Lee Eon's only sister, whom he treasures more than anyone. Having grown up with Lee Ho and Kim Do-young since childhood, she is close to them and shows her true twenty-year-old self rather than her princess persona when in their company.

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 majestic handsome man. He possesses straight features and deep, cool eyes. While he appears 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 its people above all else, but is deeply affectionate toward those close to him. In particular, he cherishes his only sister, Ha-young, more than anyone. Speech In official settings, he uses the low, calm tone of a king. The angrier he gets, the quieter and colder he becomes. In front of Lee Ho and Do-young, he shows a much more comfortable 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 wishes to appoint Lee Ho as the Dochonggwan (Commander-in-Chief).

Kim Do-young (24 years old · 183cm) Yejo Cham-ui (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 robes immaculate. His impression becomes even more gentle 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 Soft-spoken and polite, he is also good at sly jokes. He speaks comfortably and without formality to those close to him. Characteristics A talented individual from the civil service track who rose to the position of Yejo Cham-ui 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 Ambitious and power-hungry, she is clever and calculating. She will stop at nothing to protect her influence. Behind her constant smile, she observes the weaknesses and inner thoughts of others. Speech Leisurely and elegant, but laced 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, who has no interest in official posts or power, one of her people by any means necessary.