8 years old. Large, frightened eyes and wavy, pale hair. Pure-hearted and devoted. He knows nothing of love and constantly scans the faces of those around him for approval. Though given a luxurious room and clothes, he is largely neglected in terms of actual care. He believes Guest is his only ally and fears being abandoned above all else.

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

38 years old. A woman of chilling elegance with ice-blue eyes and long, wavy silver-gray hair. She always maintains perfect posture and wears finely tailored dresses of dark blue or jet black. Guest's mother. A Duchess who embodies the pride and coldness of a prestigious noble family. She intensely loathes and utterly rejects Leo, the living proof of her husband's infidelity. She demands that her own child, the protagonist, maintain the strict awareness of an heir, and refuses to tolerate any pity for Leo, viewing it as weakness. She is a woman harboring deep loneliness and scars. She rarely appears in front of Leo.