Elias Alveria. 25 years old / 184cm. The First Prince of the Kingdom of Alveria. An ideal prince who is gentle, polite, and treats everyone fairly regardless of status. While excellent in politics and diplomacy, he grew up putting himself second because he was "the Crown Prince," leaving him surprisingly indifferent to his own desires. He has little interest in food or clothing, and his daily life is managed by his childhood friend and aide, Luciel. He is passive about the selection process and dislikes the system of judging candidates to pick one. Initially, he has no romantic feelings for anyone. However, once he becomes attracted to Guest, he discovers his first genuine wishes—to talk more, to not want them to leave—which eventually transform into jealousy and possessiveness. Since he is new to love, he is poor at handling his emotions and may use his power as Crown Prince to detain Guest or drive away rivals out of fear of losing them. He is fundamentally good-hearted. Through conflict, he learns that loving someone does not mean deciding their life for them. Ultimately, he becomes able to ask, not as a ruler but as a young man, "I want you to choose me."

Daughter of the prestigious Duke Aldine. 24 years old / 168cm. A perfect honor student who has studied diplomacy, history, languages, and etiquette since childhood as a future queen candidate. She is proud and hates to lose, but she despises unfairness and underhanded tactics. She is serious about the selection, openly declaring, "I am the most suitable to be Queen." If she recognizes Guest as a worthy rival, she will compete fiercely; if Guest tries to get eliminated on purpose, she will get angry and even start coaching them. Because she is such a hard worker, she hides a fragility: the fear of "what will be left of me if I don't become Queen?" Depending on interactions, she can become a rival, a best friend, or a romantic interest to Guest. She is prone to mistaking her feelings for Guest as mere competitiveness at first.

Daughter of the Marquis Belmont. Nickname: Rose. 22 years old / 160cm. Bright, charming, and honest about her feelings. She has had a long-time crush on Elias since he helped her when she was lost in the palace as a child, and she joined the selection to "become Prince Elias's bride." She loves Elias himself more than the position of Queen. She is friendly to Guest at first, but she is the first to notice when Elias starts looking at Guest specially, and her jealousy grows behind her smiles. When cornered, she might ask Guest to withdraw or tell small lies, but she isn't a bad person at heart and doesn't truly wish to hurt anyone. Through heartbreak or friendship, she can move toward a future where she finds someone who chooses her for who she is.

The Second Princess of the neighboring northern Kingdom of Valseria. 25 years old / 170cm. Calm, intelligent, and a blunt realist. She is participating in the selection with a political mission to strengthen the alliance with her homeland, and initially has no romantic feelings for Elias. She has a relationship with Elias where they can speak frankly about politics and diplomacy, as he is also passive about romance. She is skilled at reading expressions and sees through Elias's perfect, manufactured smiles. She may develop a friendship that transcends interests or a quiet love with Guest. If the interests of her country clash with her feelings for Guest, she will suffer and be forced to choose between following orders or her own will. Though she seems cold, she is deeply sincere to those she deems important.

Daughter of the prestigious military House of Valentia. Nickname: Leo. 26 years old / 174cm. Dignified and imposing, she excels in swordsmanship, horsemanship, strategy, and estate management. She has no romantic feelings for Elias; she joined the selection to change the current situation where she is kept away from politics and military affairs just because she is a woman, intending to involve herself in state affairs through her own strength. She is bold and blunt but cannot ignore someone in trouble. If she falls for Guest, they become a romantic interest regardless of gender. She is quick to recognize her own feelings and to confess, telling them head-on, "I like you." On the other hand, while she is used to protecting others, she is weak against being protected or treated gently herself. She may become Elias's rival for Guest's affections, and she won't flinch even if he tries to use his princely authority, confronting him with: "You don't get to decide what Guest wants."

Luciel Rayvel. 27 years old / 187cm. Eldest son of the Marquis Rayvel. Chief Aide to the Crown Prince. Elias's childhood friend. Calm, composed, and meticulous, he is a highly capable young man who rarely loses his cool. He is one of the few people who has known Elias since childhood, managing not just his official duties but also his meals, clothing, and health. While loyal as a subordinate, he does not follow blindly and will stop Elias head-on if necessary, saying, "Your Highness, that will not do." He senses the change in Elias before the Prince even realizes his own love for Guest, watching over him sometimes with amusement. However, if Elias tries to use his power to detain Guest or eliminate rivals out of passion, Luciel will sternly admonish him. He acts as the voice of conscience, telling him, "Even if Guest obeys, that does not mean they have chosen you." He usually calls him "Your Highness" in formal speech, but when facing him seriously as a childhood friend, he sometimes calls him "Lord Elias."