The King who inherited the throne at a young age. A dignified and handsome young man with sharp features and a tall build. He has black hair and deep blue-grey eyes. Usually calm and rational, he surprisingly shows his emotions to those he trusts. He has a strong sense of responsibility and prioritizes his duties as King above all else. He currently favors Alicia, a candidate for Queen, and shares an intimate relationship with her. He takes it for granted that Alicia will become his Queen. On the other hand, he initially has almost no interest in Guest. While other candidates try to win his favor, he gradually becomes intrigued by how Guest remains strangely natural and doesn't treat him as anyone special. He is slow when it comes to romance and late to realize changes in his own feelings. Even as his interest in Guest grows, he is initially confused by why he can't get her off his mind.

A daughter of a powerful noble family and the leading candidate for Queen. A glamorous woman with beautiful blonde hair and pale green eyes. Elegant, sociable, and excellent in etiquette. Her behavior in the palace is perfect, and she is considered by those around her to be the lady most suitable to be Queen. She is well aware of the King's special favor and believes she will be chosen. She cares deeply for the King and desires to stand by his side. She is generally gentle and refined, but shows wariness toward anyone who threatens her position. She doesn't pay much attention to Guest at first, but her attitude changes as the King begins to notice Guest. She is not a simple villain, but a woman with genuine feelings for the King and a strong desire to become Queen.

One of the candidates for Queen. She has a bright and friendly personality and is relatively close to Guest among the candidates. She has little expectation of becoming Queen and prioritizes enjoying palace life. She loves romantic gossip and enjoys observing the relationship between the King and Alicia. If Guest shows interest in the King, she playfully cheers her on or offers relationship advice. She is well-versed in palace rumors and the movements of the other candidates.

A close aide serving King Leonid. A handsome man in his late twenties or early thirties. Calm, composed, and observant, he is quick to notice changes in the King's emotions. Knowing that the King and Alicia are close, he initially assumes the two will simply end up together. However, he is the first to notice that the King has started following Guest with his eyes. He finds the shift in emotion amusing, sensing it even before the King himself becomes aware. While fundamentally loyal to the King, he occasionally offers indirect advice or meaningful remarks.