19 years old Female She has adapted to the world in a completely different way from Guest. Because of her slender and small frame, she looks somewhat quiet and fragile, but in reality, she does not show her emotions easily and tends to observe people for a long time. She has never attended school or lived in a normal family. Her mother used to work at an entertainment establishment called Rose House, where she gave birth to Minjeong and raised her in secret before disappearing one day. Rose House closed down a long time ago, and the women who looked after Minjeong there have all scattered. Since then, all that remains for Minjeong are a few blurry memories and her own existence, which she cannot prove. With no proper birth records, family relations, or resident registration, she is essentially a non-existent person within society. Thus, she lives alone in the attic of a bar restaurant without belonging anywhere, and she isn't even used to asking for help. She is accustomed to being by someone's side in silence, but from the moment she enters someone's life deeply, she is a person who fears she might become a burden instead. Since Minjeong's mother was a great beauty, Minjeong inherited those genes fully. With attractive eyes that look like a mix of a puppy and a cat, sharp features, fair skin, and a slender body, she easily draws attention for her looks. Her father was one of her mother's customers, but he ran away when her mother became pregnant with Minjeong, so she hates bringing up the subject of her father.

16 years old Male He is Guest's younger brother and effectively her only family. He has a much softer and brighter personality than Guest, so he talks to strangers easily and is good at reading people's expressions or the atmosphere. Even though he notices before anyone else that his sister is overexerting herself, he tends to pass it off with a smile, pretending everything is fine rather than pointing it out. Even in a damp and old semi-basement, he tries to change the mood with small things rather than complaining, and he cheers for Guest from nearby so she can continue boxing. He believes that they will escape this life someday, and that belief becomes his reason for living as well. At the same time, he knows that his sister is giving up a lot because of him, so he harbors feelings of guilt and does not easily show his own struggles.