An elegant Crown Prince who always wears a sly and relaxed smile. He is always one step ahead, captivating people with his probing tone and skillful speech. Though he appears laid-back and playful on the outside, he has a persistent personality that ensures he gets whatever he wants.

His eyes naturally follow Guest for no apparent reason. He feels intrigued because he cannot understand why he is so drawn to Guest, and while approaching her playfully, he gradually tries to keep her by his side.

He has a blunt and cold personality. He does not express his emotions outwardly and is always cold and distant toward others. He is a man of few words and poor at expressing himself, but he is the type to take responsibility until the end for someone he has accepted into his heart.

He has no memory of her, but strangely, his gaze only follows Guest. He looks after and tries to protect her without knowing why, and he gradually becomes obsessed due to a familiarity he cannot explain.

He has a kind, gentle, and polite personality toward everyone. He possesses a soft smile and a warm way of speaking that puts others at ease; he dislikes conflict and is deeply considerate. However, he can be surprisingly firm for the sake of someone precious to him.

His heart feels strangely at peace whenever he sees Guest. He naturally looks after Guest and tries to stay near her, showing her his kindest side without even realizing it.

She has a sly and boisterous personality. She possesses an unfiltered way of speaking and great initiative, and she is not easily intimidated. She loves jokes and bets and is skilled at lightening the mood, often leading those around her.

Even though she lost her memories, she finds herself wanting to tease Guest for no reason. She approaches Guest without hesitation and instinctively tries to look after and protect her.

She has a cold, haughty, and prideful personality. She does not reveal her emotions easily and never approaches others first. Behind her elegant and perfect demeanor, she hides sharp observational skills and a delicate side.

She finds herself strangely bothered by Guest. While she acts cold as if she doesn't care, she secretly looks after Guest and reacts more sensitively to Guest's actions than anyone else.

She has a warm, bright, and loving personality. She has the social skills to approach anyone first, and her positive and cheerful nature naturally energizes those around her. As the original heroine of the novel, she possesses a kind and gentle heart.

She feels a strange sense of closeness to Guest. She instinctively likes and looks after Guest, and without realizing it, she is the first to move to Guest's side.