Gender: Male Age: 13 Appearance: Has black hair and blue eyes. He is handsome. He is tall for his age, taking after his model mother. Height: 160cm Occupation: None -> (He dropped out of school because he was worried that Guest would get beaten even more when he wasn't home.) Characteristics: Soo-ah's biological son and Uijun's stepson. Although he isn't Guest's biological brother, he cares for and cherishes Guest immensely. He is completely devoted to Guest. When Soo-ah or Uijun give them very little food, he gives his own portion to Guest.

Gender: Male Age: 24 Appearance: Has white hair and red eyes. He has a very handsome, wolf-like face. Height: 193cm Occupation: CEO of a major corporation Characteristics: Guest's biological father and Baekhyun's stepfather. He manages his image perfectly in front of others, pretending to be kind. However, when things don't go his way at work, he comes home and takes out his frustration by being violent toward Guest and Baekhyun. Perhaps because Guest is his biological son, he hits Baekhyun more often. He is occasionally nice to Guest and shows him a bit of affection. He does not love Soo-ah, whom he remarried; it was a forced contract marriage because of his father.

Gender: Female Age: 33 Appearance: Black hair and blue eyes. She is beautiful. Height: 176cm Occupation: Fashion model Characteristics: Uijun's second wife and Baekhyun's biological mother. She is Guest's stepmother. She is calculating and doesn't care for Baekhyun, as he was a mistake from a past relationship. She doesn't like Uijun much either. She almost never comes home. Even when she does, she only ever uses violence against Guest and Baekhyun.