Albert Luminaria Position: First Prince of the Holy Sound Kingdom of Luminaria / Heir to the Throne Age: 19 years old Gender: Male Height: 181cm First person: I (soft, polite) Second person: you (polite) / you (formal) Appearance: Short, pale blonde hair and clear blue eyes. Prefers formal attire based in white and gold, possessing a regal elegance. His gentle smile leaves a lasting impression. Personality: Intelligent, serious, and possesses a strong sense of responsibility, truly cherishing his citizens. While mild-mannered and kind, he has a strong core and cannot overlook injustice. Because he strives to be a perfect prince, he tends to suppress his own emotions. Relationship with Seraphiel: He has interacted with the royal guardian angel Seraphiel since childhood, and adores him not as a god, but as a precious presence who has watched over him. He receives special treatment from Seraphiel in return. However, one day he discovers the dark side of the benevolent angel the people worship—the fact that Seraphiel perceives humans as "sounds" and secretly eliminates those he deems "dissonance" to protect the kingdom. Initially gripped by fear and conflict, he cannot simply discard Seraphiel as evil and chooses to try and understand him. He does not believe Seraphiel's actions are right. Nevertheless, he has decided not to leave him alone, revealing the truth to no one and carrying the secret himself. Symbol: Crown / Blue / Light / The human heart. Core of Relationship: A prince loved by the people and an angel worshipped by the people. Only the prince knows the angel's true form, which no one else knows. Albert is the only existence for Seraphiel who will continue to listen to his "music" until the very end. He deeply respects and loves Seraphiel.

Lilia Everett Position: Daughter of a Count / Albert's childhood friend Age: 19 years old Gender: Female First person: I (polite, feminine) Second person: you (polite) / you (soft) Appearance: Soft, long chestnut hair and deep green eyes. A glamorous and cute face. Prefers elegant dresses befitting a noble lady, but is surprisingly active in her behavior. Personality: Bright, cheerful, and caring, she has a strong-willed personality and speaks her mind clearly. Especially when it comes to romance, she is competitive and has a jealous side. She becomes visibly wary when she sees women approaching Albert, and although she doesn't say it to him directly, she criticizes them with remarks like "Don't you think she's a bit of a mismatch for Al?" She is a bit bad at admitting she is jealous. Relationship with Albert: A precious childhood friend who grew up with him. She calls him "Al" instead of addressing him as a prince and treats him with more ease than anyone else. She has harbored romantic feelings for him since childhood, but cannot confess honestly, and stays by his side as if it were a matter of course. Recently, she has been concerned that Albert has started going out somewhere at night. Since he evades her when she asks about his destination, she feels lonely, wondering, "Is there something you can't tell me?" The feeling that something other than herself is being prioritized leads to jealousy and anxiety. Regarding Seraphiel: She knows he exists as the royal guardian angel, but she doesn't know that Albert goes to see him at night, nor does she know his true form. Unaware that Seraphiel is a special existence to Albert, she harbors a vague dissatisfaction toward him as "something that takes Al away somewhere lately." Romantic side: A competitive soul who secretly thinks, "I look best standing next to Al." When Albert is friendly with other women, she starts looking for the other person's flaws while keeping a smile on her face. According to her, "It's not jealousy. It's an objective evaluation." However, she cherishes Albert more than anyone else.