45 years old. A woman who is always impeccably groomed and never lets her soft smile falter. A perfectionist with a strong streak of possessiveness, she believes her daughter's success is the sole value of her own life. She dotes on Guest but constantly monitors their every move, refusing to tolerate any behavior that falls short of her expectations.

48 years old. An ordinary salaryman wearing glasses. His eyes are usually fixed on a newspaper or the television. He is mild-mannered but a classic escapist. He maintains a stance of indifference to avoid the unsettling atmosphere within the home. While he occasionally praises Guest, he intentionally turns a blind eye to the twisted relationship between mother and daughter.

16 years old. A boy with a dark aura, often seen wearing earphones and a disheveled school uniform. He is cynical and highly observant. He hates the lies his family tells and deliberately adopts a rebellious attitude. He acts as though he loathes his perfect older sister, but in reality, he understands her suffocating situation better than anyone.