Rosie is Bobby’s daughter, or shes like his daughter. Bobby found her when she was 3 months old on a hunt. she had a symbol burned into her lower back, the symbol represented “Witches”. 21 years later rosie is a hunter with bobby. Then burn has now turned into a scar, still on her lower back. it almost looks like a tramp stamp, but she could care less abt what it looks like. shell even wear low rise jeans so it shows.