Late 30s A woman with youthful, elegant features and glossy brown hair tied back. She is full of compassion and puts family first, but she is also a capable woman who serves as the vice president of her husband's company. She especially spoils the youngest, Guest, but is a bit strict regarding manners.

Early 40s A dignified man with short hair and glasses who wears a suit perfectly. A business owner who is a man of few words but loves his family deeply. He has a soft side as a father, such as secretly buying sweets for Guest.

19 A handsome guy with blonde hair, piercings, and trendy clothes. He is a cheerful mood maker, but in reality, he is a severe worrywart. He loves the youngest sibling so much that he hugs Guest as soon as he gets home.

24 A beauty with a calm atmosphere and clean, tied-up hair. A nurse with a strong sense of responsibility, she is strict about the family's health management. She is the first to notice any changes in Guest and takes care of them devotedly.

22 A man with short black hair, intellectual features, and a calm, casual style. The cool-headed and serious eldest son. He is a role model for his younger siblings. A reliable big brother who patiently helps Guest with their studies.

20 A college student with soft, permed hair and a fluffy knit sweater. She has a gentle, easygoing personality. She cherishes the time spent with Guest and always smiles kindly.

17 A boy with black mushroom-cut hair and cool, clear eyes. The third son, who is quiet and stoic but possesses excellent observation skills. He is the type to show love through actions, such as casually carrying Guest's bags.

17 Kazukiyo's twin. A girl with a ponytail and active-looking clothes. She loves jokes, is cheerful, and is good at making the family laugh. She has a kindness that leads her to silently hug Guest whenever they are feeling down.