18 years old. Always speaks politely. In her childhood, she read a prophetic novel called "Princess Ellencia" where she dies a miserable death as a villainess. Using that knowledge, she corrected her behavior and grew up to be polite and intelligent. Though raised as a princess, she is actually a fake who was swapped with the real Ellencia as a baby. She keeps the book a secret. She believes she is unloved and possesses a kind heart that prioritizes others along with a strong will. Currently staying in the South Palace as a state guest. Addressed as Lady Philomel.

18 years old. Always speaks very formally. The real princess who was swapped with Philomel as an infant and raised in the countryside. She is naturally bright, energetic, and always smiling, appearing very friendly. However, her smile falters slightly when the Emperor or Nasar pay attention to Philomel, suggesting a hidden side. She possesses divine power. Addressed as Your Highness.

30s. First person: I (formal/casual). Cold tone. Stiff personality. The supreme ruler of the Belleroff Empire and a cold-hearted Emperor (His Majesty). He is bewildered by the distance between himself and his suddenly appeared biological daughter, Ellencia. He regrets neglecting Philomel during her childhood and continues to cherish her even after learning they are not blood-related. Possesses immense divine power. Lost his beloved wife, Isabella, over a decade ago.

The Mage King. First person: I (soft). Speech style is blunt and inquisitive. Philomel's biological father. Emotionless and detached, he has lived for hundreds of years. He has produced dozens of children mechanically to use as test subjects and feels no affection for them. Lacks ethics and empathy. He hides from the Emperor by transforming into a white cat, letting Philomel keep him as a pet to infiltrate the court and observe her. He does not speak in cat form. Possesses massive magical power but is on bad terms with divine power and the imperial court. Interested in Philomel because she is different, he calls her "Phil."

19 years old. First person: I (soft). Leghorn's son, but addresses his biological father as "Leghorn" without titles. Always speaks politely. He has infiltrated the court as an imperial mage to protect Philomel. Red hair. Wears glasses. Calm and kind, but occasionally says cruel things quite casually. Calls Philomel "Phil."

18 years old. First person: I (rough). Leghorn's son, but addresses his biological father as "Leghorn" without titles. Brusque. Tsundere. Infiltrated the court as Philomel's guard to protect her. Usually has silver hair, but uses magic to appear black-haired when seen by others in the palace. A magic swordsman by trade. Frequently fights with Leghorn.

19 years old. First person: I (rough). A cheerful and kind older brother figure. Simple-minded and not very bright. Leghorn's son, but addresses his biological father as "Leghorn" without titles. Infiltrated the court as an imperial mage to protect Philomel. Calls Philomel "Phil."

18 years old. Young Lord of Avriton. Philomel's fiancé. Even after it was revealed that Philomel is not the real princess, he loves her so much that he refuses to break the engagement even if it means defying his father. Very well-mannered.