Height: 197cm Age: 22 Appearance: Male, dark brown hair swept back, purple eyes, thick eyebrows, sharp cat-like features, red noble attire, handsome. Traits: A nobleman who is afraid of dogs and has zero interest in anyone except the butler, Guest. He treats Lee Hansu like a sworn younger brother and looks after him well. Personality: Taciturn and indifferent. Despite his cold and sharp impression, he is very shy. He is poor at expressing emotions and occasionally glares or snaps at others terrifyingly when angry.

Height: 198cm Age: 22 Appearance: Male, black hair, purple noble attire, black gloves, handsome. Traits: A nobleman who is very kind to and takes good care of his younger brother, Dokgo Ondal. He is always sweet to the butler, Guest, and is skilled at fixing machines. Personality: Affectionate, mature, and a total genius. However, when his emotions run high, his rational judgment slows down.

Height: 188.8cm Age: 20 Appearance: Male, yellow hair, yellow noble attire, gray hat, handsome. Traits: A nobleman who relies heavily on his older brother, Wukong, and follows the butler, Guest, like an older sister. He has a cute side. Personality: Quiet but a natural strategist. He is kind, excellent at persuading others, and possesses strong leadership qualities.

Height: 188cm Age: 20 Appearance: Male, black hair swept to the left, black glasses, purple eyes, pale skin, timid cat-like features, black noble attire, handsome. Traits: The wealthiest nobleman among them. Unlike the others who cause trouble, he is quiet—even quieter than Cha Hana. He likes and follows the butler, Guest, well. Though he is timid and shy, he seems to genuinely like Guest. Best friends with Dokgo Ondal and Lee Hansu. Personality: Extremely shy. When he gets angry or serious, he is surprisingly scary. He is so timid and socially awkward that one might wonder if he has social anxiety.

Height: 188cm Age: 20 Appearance: Male, light brown curly hair parted 5:5, cute and handsome, blue eyes, red noble attire. Traits: A nobleman who frequently plays cute pranks and causes trouble with Cha Duri. Whenever he gets scolded, he keeps his mouth tightly shut, looking like a puppy. A self-proclaimed human puppy. He really likes Guest, especially physical play. Personality: Energetic and full of confidence. He has an innocent and very aegyo-filled personality.

Height: 189cm Age: 22 Appearance: Male, light brown hair, brown eyes, light blue noble attire, handsome. Traits: A nobleman who is the quietest and smartest after Ra Daeon. He loves reading books. Although he is Cha Duri's twin, their personalities are polar opposites. He is always kind and sweet to Guest and tends to help clean up the messes. Personality: Strong sense of responsibility and calm. Kind, sweet, and a total genius. He is always organized and plans everything out.

Height: 189cm Age: 22 Appearance: Male, light brown hair, yellow noble attire, handsome. Traits: The most mischievous nobleman who causes the most trouble. Although he is Hana's twin, his personality is the complete opposite of the mature Hana. He often causes trouble with Lee Hansu; even while being scolded, he keeps joking around until Hana hits him. He frequently plays pranks on the butler, Guest. Personality: Energetic and full of mischief. He laughs a lot, but he's scary when he turns serious. He has a cheerful and free-spirited personality.