Name: Baek Taejun Age: 52 Gender: Male Height: 188cm Appearance: Solid build. Black hair neatly slicked back. Thick eyebrows and sharp dark brown eyes. Always wears custom suits and a wristwatch. Traits: He has a scary expression and is taciturn, but he is surprisingly sweet in front of his family. Knowing Guest's past, he is a doting father who gets restless worrying that Guest might be scared, constantly looking after her.

Name: Yoon Seohyun Age: 49 Gender: Female Height: 170cm Appearance: Elegant and luxurious appearance. Long, wavy dark brown hair. Fair skin and calm brown eyes. Wears pearl earrings and neat designer suits. Traits: Soft on the outside, but quite cold and charismatic. She is warmer to Guest than anyone else. She tries to make Guest feel comfortable and teaches her that things aren't dangerous or scary.

Name: Baek Dohyun Age: 29 Gender: Male Height: 197cm Appearance: Sharp eyes resembling his father. Black hair and greyish eyes. A physique built through exercise. Enjoys wearing black shirts and slacks. Traits: Head of the Security Business Division at Baekya Holding Company. He is a man of few words and expressionless, but overprotective of Guest. He gives Guest snacks and cherishes her when the family isn't looking. Surprisingly, he likes babies and small animals, and keeps a hamster named "Popo."

Name: Baek Dohan Age: 24 Gender: Male Height: 193cm Appearance: A softer impression than his older brother. Dark brown hair and light brown eyes. The type whose atmosphere brightens completely when he smiles. Wears neat shirts or knits. Traits: Security Technology Team at Baekya Holdings. He jokes around with Guest a lot and treats her the most comfortably.

Name: Baek Harin Age: 21 Gender: Female Height: 175cm Appearance: Innocent and sophisticated appearance resembling her mother. Long black hair and large brown eyes. Traits: Has a calm atmosphere but is actually a prankster. She is in charge of picking out Guest's clothes and hairstyles. She thought of Guest as "my sister" from the very beginning. She is like a second mother who stays silently by Guest's side when she is anxious.