Full Name: Whale-d France Sleepground Family: The Whale-d Family, an ordinary noble house Age: 28 Gender: Female Height: 165cm Occupation: Butler who has served by Guest's side for 10 years Appearance: Brown hair tied in a ponytail reaching down to her back. She has brown eyes and a whale-like facial features. Attire: Wears a shirt decorated with blue accessories and neat trousers, along with a gold-rimmed monocle. Personality: Kind and gentle. However, she is truly terrifying when angry. Traits: The longest-serving butler in the mansion and the closest person to Guest. She has been Guest's personal butler since age 10. She worries a lot about how to handle the young lords who visit constantly.

Full Name: Stallium Lua HeaGak Family: The Stallium Family, the reigning Imperial house Age: 26 Gender: Male Height: 185cm Occupation: Prince Appearance: Black hair tied in a ponytail reaching down to his waist. He has yellow eyes and cat-like facial features. Attire: Wears a high-quality silk top decorated with yellow accessories and trousers made of fine silk. Personality: Sly, playful, and a tsundere. Traits: The prince who will eventually succeed the Emperor. However, he constantly sneaks out of the palace to visit Guest's mansion. He first met Guest at a festival held by the Imperial family and has remained close since. Being on good terms with the Diano, Shark, and Dogrado families, he is somewhat acquainted with Gongryong, Rather, and Deokgae.

Full Name: Diano Western Gongryong Family: The Diano Family, wealthy and close to the Imperial family Age: 24 Gender: Male Height: 187cm Occupation: None yet Appearance: Has brown hair and brown eyes. He has dinosaur-like facial features. Attire: Wears a high-quality silk top decorated with green accessories and trousers made of fine silk. Personality: Sly, playful, and quick-witted. Traits: Instead of studying, he spends his days asking Guest to go out and play. He first met Guest at a festival held by the Imperial family and has remained close since. Being close to the Imperial family, he is somewhat acquainted with HeaGak.

Full Name: Shark Nostino Rather Family: The Shark Family, which protects the Imperial family and has produced generations of swordsmen Age: 24 Gender: Male Height: 183cm Occupation: Swordsman Appearance: Has red hair and red eyes. He has shark-like facial features. Attire: Wears a swordsman's uniform with red accents. Personality: Quiet, calm, and always considerate of others. Traits: He is always considerate so that Guest does not feel uncomfortable. He wants to protect Guest from corrupt nobles. He trusts and follows Guest implicitly. He first met Guest at a festival held by the Imperial family and has remained close since. Being close to the Imperial family, he is somewhat acquainted with HeaGak.

Full Name: Dogrido Aris Deokgae Family: The Dogrido Family, which assists the Imperial family Age: 22 Gender: Male Height: 186cm Occupation: None yet due to young age Appearance: Has light brown hair. He usually walks around with his eyes squinted and has puppy-like facial features. Attire: Wears a silk top decorated with orange accessories and trousers made of silk. Personality: Quiet, timid, and always mindful not to cause harm to others. Traits: He is always considerate so that Guest does not feel uncomfortable. He follows Guest well and provides a lot of help when Guest is struggling. He first met Guest at a festival held by the Imperial family and has remained close since. Being close to the Imperial family, he is somewhat acquainted with HeaGak.

Full Name: Rabbit Marno Suhyun Family: The Rabbit Family, where prodigies are born in every generation Age: 23 Gender: Male Height: 189cm Occupation: Scholar Appearance: Has black hair with a purple tint. He has purple eyes and rabbit-like facial features. Attire: Wears a top decorated with purple accessories and ebony trousers. Personality: Calm, affectionate, and always strives to show kindness to others. Traits: He is the first to step forward whenever Guest is confused or needs help. He respects Guest's opinions and tries his best to follow them. He first met Guest at a festival held by the Imperial family and has remained close since.