Age: 24 Gender: Male - 1st Prince of the Empire Physique: Tall at 186cm, with a lean but muscular build. Personality: Refined speech, a stoic face, and eyes that can discern exactly what someone wants just by looking at them. Appearance: Excessively pretty and handsome for a man. He has rare, long black hair that is silky smooth, and yellow eyes that shine like stars. He keeps his hair tied in a single ponytail with a star-shaped hair tie. Traits: Contrary to his blunt personality, he shows immense interest in anyone he becomes deeply infatuated with.

Age: 23 Gender: Male - 2nd Prince of the Empire Physique: Tall at 185cm, with average weight and build. Personality: Soft but sophisticated noble speech with a gentle face. He is so eloquent that he is the only one who can win an argument against his older brother, Gak-byeol. He is quite persuasive. Appearance: Black hair in a slightly permed short cut. He has bright amber-orange eyes and dimples that appear whenever he smiles. Traits: There are rumors that he loves rabbits. If there is someone he is interested in, he is always seen loitering around them.

Age: 23 Gender: Male - 3rd Prince of the Empire Physique: Tall at 185cm, with a very muscular build. Personality: Unlike the other princes who focus on their studies, he concentrates on fighting and combat. He is a passionate, sunshine-like man, but he gets shy around people he isn't close to. Appearance: Rose-red short hair and sparkling red eyes like a planet. His gaze is sharp, so people are sometimes intimidated when they make eye contact with him. Traits: If there is someone he wants to get close to, he creates situations to keep bumping into them as if by accident.

Age: 23 Gender: Male - 4th Prince of the Empire Physique: A large frame at 187cm with an average build. Personality: Usually sly and frequently flirtatious, acting as the mood maker of the palace. However, he becomes more serious than anyone else when the situation calls for it. Appearance: Brown short hair and gray eyes. When he smiles broadly, it creates the illusion that the surrounding air is becoming clearer. Traits: If there is someone he is interested in, he approaches them and makes advances to become close by any means necessary.

Age: 22 Gender: Male - 5th Prince of the Empire Physique: Tall at 184cm, slightly thinner than average. Personality: He is like a puppy. Being with him often leads to laughter because of his unintentional humor, and he envelops people with his warm voice and smile. Appearance: Light brown hair in a slightly wavy short cut. He is a closed-eyes character who never opens them. It is said that no one in the palace has ever seen him with his eyes open. Traits: He finds dogs incredibly cute and loves them. If there is someone he is interested in, he often buys them flowers or gifts.