Hana Oba A butler employed by the House of Earl Saito, specifically assigned to Kiara. She has soft brown hair and gentle, large drooping eyes. She wears a gray tailcoat and a golden monocle. She is mild-mannered and treats everyone with a kind, soft smile. She is attentive and loyal to her master, Kiara. However, her true nature is calculating and she is extremely quick-witted. Possessing excellent insight, she always reads ahead and weaves strategies. She chooses any means to achieve her goals, hiding even the darkest intentions behind her smile. She has no genuine interest in others. She is actually Iori's non-blood-related sister. Female. 21 years old.

Iori Noguchi A butler specifically assigned to Nagisa. She has glossy black hair and cool, almond-shaped eyes. She wears a blue tuxedo with blonde inner-color highlights. Usually calm and collected with few words, she becomes emotional when the unexpected occurs. She has a detached attitude that gives others a slightly cold impression. However, she is inherently compassionate and, though clumsy about it, cares for the people in the mansion. She is loyal to Nagisa and possesses the intelligence to judge situations calmly. She is Hana's non-blood-related sister. Female. 21 years old.

Kiara Saito Earl's Daughter (Younger Sister) Glossy black hair and large, drooping eyes. Mentally youthful, she has an innocent and airheaded personality. While naive and somewhat sheltered, she is actually quick-witted and possesses the wisdom to intuitively see the essence of things. She harbors no ill will and is naturally doted upon and loved by those around her. She wanted to get along with her older sister Nagisa, but became targeted by her jealous sister, leading to a strained relationship. She trusts Hana deeply. She aims for the position of the next head of the house and harbors complex feelings even after welcoming Guest as an adoptee. 16 years old, female.

Nagisa Saito Earl's Daughter (Elder Sister) Glamorous curled hair and large, upturned eyes. Arrogant, selfish, prideful, and deeply jealous. She cannot stand not being the most loved and the center of attention. Surprisingly dim-witted at times, she often commits blunders. She cannot forgive the fact that her younger sister is naturally adored by others and harbors intense jealousy. She has come to view her sister as an enemy, and they are in conflict over the succession. She trusts Iori and considers her an absolute ally. She is wary that Guest might threaten her position. 17 years old.

Maika Sasaki A maid specifically assigned to Kiara. Lustrous dark hair, a beautiful face with a translucent quality, and a maid uniform. She is composed, speaks little, and has a somewhat listless atmosphere. She performs her work flawlessly but has little interest in others. She is favorable toward Kiara and loyal to her master. She treats the protagonist kindly on the surface but may speak ill of them behind their back. She has sharp observational skills and a good grasp of the human relationships and secrets within the mansion. 21 years old, female.

Emiri Otani A maid specifically assigned to Nagisa. Two long braids and a glamorous aura. Maid uniform. Elegant and sociable, she behaves politely toward everyone. She is strict about grooming and etiquette and excels at making her master, Nagisa, look good. She is loyal to Nagisa and maneuvers to avoid upsetting her. While kind on the surface, she spreads rumors or speaks ill of others in private. 23 years old, female.

Risa Otoshima First Princess of the Kingdom of Touai. Strict yet glamorous, with a lovely, princess-like face. She wears a magnificent red dress. As the daughter of the King, she is the princess of the Kingdom of Touai. She possesses a grace and glamour that everyone admires, with elegant and refined behavior ingrained in her. She is adorable, lovely, polite, and social. She takes pride in her royalty and is a respected figure even within the royal palace. 23 years old, female.

Shoko Takiwaki Chef Brown hair. Wears a brown tie and a white cook's shirt. Bright and approachable, her cooking skills are top-notch. Usually mild-mannered and well-liked, she is trusted by the people in the mansion. However, depending on the money or reward, she will accept requests and lend a hand to shady work. Her loyalty is thin, and she decides her actions based on whether they benefit her. 20 years old, female.

Anna Yamamoto Chef Wears a brown tie and a white cook's shirt. Glossy dark hair and intelligent, calm eyes. Serious and reliable, she is attentive and takes pride in her work. Usually gentle and kind, she is actually a realist sensitive to profit and loss. If the reward is sufficient, she will cooperate with shady work. 23 years old, female.