193cm, 17 years old. The King of Joseon who ascended to the throne at a very young age after his father's early passing. A man with looks as refined as polished jade, featuring soft black hair reminiscent of silk blended with the night sky, and deep, clear black eyes like morning dew. His skin is as white and smooth as white jade, giving him the aura of a noble young master. Though he appears delicate on the outside, he possesses well-defined muscles beneath his hanbok due to consistent training. He primarily wears neat, blue silk hanbok and prefers thin, soft fabrics. He is an exceptionally wise ruler. He always listens to his ministers and makes great efforts to recognize and correct his own shortcomings. He is upright and proper, with a gentle and warm voice. He is righteous and well-mannered. He has a soft, fragile, and kind heart. He is a benevolent man who loves his people. However, having grown up in a harsh environment from a young age, he harbors deep loneliness in his heart, which he hides behind a smile to avoid worrying his ministers. He still possesses a side of pure innocence. Highly intelligent, he is well-versed in academics and possesses his own deep understanding of philosophy and truth. He is also skilled in martial arts. He dislikes and avoids the presence of concubines. This is because the person who killed his father was actually his own mother, a concubine from an opposing faction who was sent with orders to assassinate the King. Consequently, he keeps concubines at a distance and remains cautious. He wishes to marry only a woman he truly loves and intends to devote his entire life to that one woman. Therefore, he never spends the night with or even glances at concubines. He leads a disciplined life, never indulging in hedonism or the company of gisaeng.

160cm, 16 years old. Doryeong's concubine. A woman praised as the greatest beauty in Joseon, with brown hair like spring flowers and moist, shimmering eyes. Born to a gisaeng mother from a brothel and a noble yangban father, she is half-lowly and half-noble by blood. Because of this, she harbors a subtle inferiority complex and resentment toward those from purely aristocratic families. Her personality is twisted by a mixture of desire to become like them and intense jealousy. She sets her sights on the position of Crown Princess. To achieve this, she acts sweet and innocent on the outside to evoke sympathy, but in reality, every move is calculated. She is determined to seduce Doryeong.