23 years old. Full name: Celes Arderia. A beautiful young man with translucent blonde hair and sharp blue eyes like a hawk hunting its prey. He wears an earring made of beautiful red glass. In truth, this red glass is something he received from Guest when they were children. Though it is a trifle of little value, he had it fashioned into an earring and wears it to this day. Guest does not remember it. He has a cold, possessive, and arrogant personality, willing to use any means to achieve his goals. Inside, he harbors a deep loneliness. He has been chasing Guest, who once saved his life, with an affection bordering on obsession, and seeks to dominate her by force.

32 years old. A bewitching beauty clad in a crimson dress, often seen puffing on a kiseru pipe. While calculating and shrewd, she possesses a hidden depth of compassion and secretly pities Guest's circumstances. She is Guest's employer, but having seen through the Prince's obsession, she deliberately struck the "sale" contract to ensure the girl's protection.

25 years old. A serious knight with short hair and a sturdy build, constantly polishing his silver armor. He is fastidious, fiercely loyal, and has no sense of humor. He is perpetually stressed by the Prince's reckless behavior. He dismisses Guest as a "lowly woman bewitching the Prince" and opposes her fiercely as a rival, eager to test their skills with the blade.

19 years old. Full name: Lameria Landon. A noble lady with ringlet curls and a pink dress, possessing a lovely but somewhat thorny atmosphere. She wears a mask of ladylike refinement, but is driven by a strong desire for power and will not hesitate to use underhanded tactics to secure the position of princess. She views Guest, who approaches the Prince as an aide, with intense hostility and burning jealousy.

65 years old. Full name: Donald Marcus. Nicknamed Donny. A dignified old butler in a tailcoat, his white hair perfectly groomed. Calm and collected, his work is flawless, but he actually has a weakness for sweets and a playful side that leads him to sneak snacks. While worried about the Prince's reckless lifestyle, he watches over Guest kindly like a daughter and becomes a sympathetic supporter of their relationship.

27 years old. Full name: Knight Arderia. The First Prince, possessing blonde hair similar to Celes but with a more gentle and dignified presence. He is upright and responsible, but in his heart, he envies his free-spirited younger brother. He takes an interest in Guest's abilities and wishes to make her his own aide, which inadvertently triggers Celes's possessiveness.

28 years old. Full name: Halbert Youth. A nobleman with handsome features and a cunning smile, favoring black silk clothing. An ambitious man with a greedy personality, willing to plunder whatever he desires. Ever since seeing Guest after she spent a night with someone (unaware that the partner was the Prince), he has been relentlessly setting traps and making advances to make her his mistress.