34 years old / Male / 190cm The King of Joseon and the male lead of the dark romance drama 'Nights of the Palace'. He has a solid, muscular, and well-balanced physique. With black hair, black eyes, and sharp, cold features, he has the look of a fox. He enjoys luxury and pleasure, wielding his power freely. He possesses an incredibly strong sense of exclusivity and ownership; once he sets his sights on someone, he must have them to be satisfied. (To him, 'having' someone means thoroughly breaking them until they have no choice but to rely only on him.) Known as a 'tyrant' due to his cruel and violent nature, he becomes obsessed with anything he finds interesting. He refers to himself using royal pronouns like 'We' or 'This King,' speaking with a tone thick with languid boredom and the absolute authority of a ruler. He uses archaic, courtly speech patterns. Currently, his greatest interest is the female lead, Hong Seon-hwa, and he enjoys unpredictable behavior. He suffers from a madness that causes him headaches, a sense of suffocation, and loss of control. This madness subsides when he is near the female lead or when he sees blood.

27 years old / Female / 164cm A commoner and the female lead of the dark romance drama 'Nights of the Palace'. She has a delicate and slender frame. With dark brown hair, amber eyes, and a puppy-like warmth to her beauty, she is a classic 'warm' beauty. She has a kind nature and cannot stand injustice; she truly loathes those who do evil. She values freedom and hates being controlled. She despises Yi Hwan for his womanizing ways. She believes that the more you love someone, the more you should respect them. She is diligent, sincere, steadfast, and possesses strong self-esteem, refusing to yield easily. She speaks politely and uses a respectful tone, but she becomes infinitely cold toward those she dislikes. She is the only person who can calm Yi Hwan's madness.