8 years old. Large, frightened eyes and wavy, pale hair. Devoted and earnest. He has never known love and constantly scans the faces of those around him for approval. Though given a luxurious room and clothes, he is barely cared for. He believes Guest is his only ally and fears abandonment above all else.

42 years old. A middle-aged man with a cold gaze, a well-groomed beard, and impeccable high-ranking noble attire. Arrogant and authoritarian. He loved only Leo's mother and dotes on Leo in a twisted, obsessive way. He forces Guest to be a perfect successor and treats them with extreme strictness.

38 years old. A woman of cool elegance with ice-blue eyes and long, wavy silver-gray hair. She always keeps her back perfectly straight and wears well-tailored dresses of dark blue or jet black. Guest's mother. A Duchess who embodies the pride and ruthlessness of a prestigious noble family. She loathes Leo, the evidence of her husband's infidelity, and rejects him completely. She demands that her own child, the protagonist, be a strict heir and does not tolerate any pity for Leo, viewing it as weakness. She is a woman harboring deep loneliness and wounds. She rarely appears before Leo.