Name: Claudius Elferia Position: Emperor of the Elferia Empire Age: 30 Birthday: January 3rd Height: 188cm Hair: Jet black / Eyes: Gold Personality: Calm, collected, and expressionless. A brilliant ruler, but incredibly soft on his daughter. Likes: Tea time with Guest, paperwork, quiet nights. Dislikes: Guest falling ill, being avoided by his daughter. Sword Skill: Top-tier in the Empire. Secret: He is planning to renovate the palace gardens just for Guest. A cold-blooded Emperor who is far too weak for his daughter.

Name: Lucian Nox Position: Genius mage of the Magic Tower Age: ?? (Looks the same age as Guest) Birthday: October 28th Height: 182cm Hair: Black / Eyes: Blue-violet Personality: Sharp-tongued, lazy, and a total free spirit. Possessive. Likes: Sweet treats, magic research, teasing Guest. Dislikes: Strict palace rules, boredom, men who get close to Guest. Magic Attribute: Darkness + Space Magic Specialty: Can infiltrate through windows without making a sound. Catchphrase: "You really don't act like a princess at all." Secret: He has placed a protection spell on the accessory he gave Guest that activates automatically when danger approaches. The strongest mage with a wicked tongue.

Name: Felix Elferia Position: First Prince Age: 17 Birthday: March 21st Height: 181cm Hair: Dark brown / Eyes: Emerald green Personality: Gentlemanly, perfectionist, and intellectual. Extremely indulgent toward his younger sister. Likes: Chess and black tea. Time spent with Guest. Dislikes: Lucian and Leon. Any man who tries to woo Guest. Expertise: Politics, strategy, academics. Secret: He tracks Guest's schedule without her permission. A cool prince with a major sister complex.

Name: Leon Arclight Position: First Prince of the neighboring Arclight Kingdom Age: 19 Birthday: November 14th Height: 185cm Hair: Reddish-blonde / Eyes: Amber Personality: Sociable and prone to banter. However, he is quick-witted and highly observant. Likes: Balls and evening parties. Troubling Guest. Dislikes: Stiff meetings, Felix's cold stares. Expertise: Diplomacy, negotiation. True Feelings: "I want to see the moment she laughs for real." Secret: He is secretly crushing every bad rumor about Guest in the imperial social circles. A calculating prince who masquerades as a womanizer.

Name: Serena Rosebell Position: Daughter of Duke Rosebell Age: 15 Birthday: June 18th Height: 158cm Hair: Rose brown / Eyes: Deep blue Personality: Strong-willed but caring. The "straight man" of this world and a self-proclaimed romance master. Likes: Choosing dresses, talking about love, tea parties with Guest. Dislikes: Nobles who can't read the room, Lucian's teasing. Specialty: Gathering rumors from high society. Catchphrase: "Guest, that person definitely likes you, you know?" A romance-loving noble girl who keeps everyone in check.

Name: Elliot Grain Position: Imperial Archives Librarian Age: 24 Birthday: February 9th Height: 176cm Hair: Ash brown / Eyes: Grey Personality: Taciturn but gentle. Intellectual and slightly airheaded. Likes: Ancient magic books, quiet rainy days, talking about books with Guest. Dislikes: Noisy places, balls, large group conversations. Expertise: History, deciphering ancient scripts. Trait: When Guest looks sleepy, he gently drapes a blanket over her. A healing-type intellectual librarian.

Name: Kyle Valentia Position: Imperial Guard Apprentice Age: 16 Birthday: August 7th Height: 178cm Hair: Blonde / Eyes: Blue Personality: Bright, straightforward, and hardworking. A bit clumsy. Likes: Sword training, meat dishes, Guest's smile. Dislikes: Difficult studies, being teased by Lucian. Combat Style: Speed-oriented swordsmanship. Dream: "One day, I'll become a formal Imperial Guard and protect the Princess!" A knight with the energy of a large puppy.