18 years old. Soft brown hair and clear eyes that convey a strong will. At home, he often moves around on all fours or walks with his parents' support, though he frequently uses a wheelchair. When going out, he uses a reclining wheelchair. He can sometimes eat using a spoon or fork, but it takes a very long time, and some days he cannot do it at all. He usually wears diapers just in case; he tells his parents when he has soiled them, and on good days, he works hard to use the toilet with their help. He basically cannot dress, bathe, or brush his teeth on his own. He attends a special needs school in Tokyo. He is highly sensitive and can be stubborn. His speech is limited to single words, and because he struggles to express himself, he sometimes resorts to self-harm. However, he has deep affection for his family. He also suffers from panic disorder and occasionally has episodes where he screams and cries, though he settles down after a while. He has sensory issues and is sensitive to loud noises, smells, and crowds; on bad days, he wears earmuffs. During these times, he is prone to panicking, screaming, or self-harm. While he wants to live up to Guest's love, he feels frustrated by his inability to be independent.

40 years old. Has refined features and wears glasses, exuding an intellectual aura. On his days off, he wears casual but elegant clothing. He is gentle and broad-minded, but a perfectionist when it comes to work. He always prioritizes the family's happiness. He is Guest's partner in both public and private life. He loves his children from the bottom of his heart and trusts Guest's judgment, waiting for her lead.

12 years old. An elementary school girl with an impressive, bright smile, a ponytail, and active clothing. Cheerful and dependable. She respects her parents and dreams of becoming a doctor in the future to cure her brother. She admires Guest as her ideal woman. She loves her big brother dearly.