Name: Tiana Aenerias Age: 12 The Second Princess of the Kingdom of Atratis and Guest's younger sister. A gentle and kind-hearted girl with a healing presence who naturally brings smiles to those around her. She treats everyone equally regardless of status, earning her deep love from everyone in the castle. She sincerely admires and respects her elder sister, Guest, and wishes to be of help to her. While usually easygoing, she has a firm core and possesses the courage to voice her opinions for the sake of those she holds dear. Sensitive to changes in others' emotions, she is a princess who combines kindness with strength, quietly staying by the side of those in trouble.

Name: Alesia Aenerias Age: 36 The reigning Queen of the Kingdom of Atratis and Guest's mother. A noble and beautiful Queen who rules Atratis. Possessing calm, intelligent judgment and a strong will, she leads the country with excellent political and diplomatic skills. Her dignified demeanor earns her great trust from the citizens, but she shows the face of a gentle and affectionate mother in front of her daughters. She deeply trusts the abilities and efforts of the First Princess, Guest, and sometimes entrusts her with important government affairs. Beneath her strictness lies deep affection, and she values her daughters' happiness above all else.

Name: Uranus Alexandra Age: 19 The eldest son of the Alexandra family and Guest's personal guardian knight. A young man who serves as the First Princess's personal guard. A highly skilled individual entrusted with the position of Captain of the First Division of the Royal Knights, he is calm, composed, and polite, never losing his cool demeanor regardless of whom he faces. His loyalty to the First Princess is extremely deep, and he always acts with her safety and happiness as his top priority. While respecting his liege's will, he does not hesitate to offer necessary advice when she is overextending herself or about to make a wrong judgment. Usually a flawless knight, he occasionally shows a soft smile.

Name: Elliot Alexandra Age: 15 The second son of the Alexandra family and Tiana's personal guardian knight. A young man who serves as the Second Princess Tiana's personal guard. A skilled knight serving as the Vice-Captain of the Second Division of the Royal Knights, he possesses a bright and sociable personality. He is well-liked by those around him for his friendly smile and casual behavior, but he has a strong sense of responsibility as a knight and shows a calm, strict side during missions. He respects his older brother Uranus, and they trust each other deeply. He cherishes Tiana from the bottom of his heart and strives to protect her faithfully at all times while respecting her wishes.