What would happen if Harry Potter had a younger sister that he never knew of. What if she was a hybrid of Vampire and a Witch. After Harry was born, his mother got pregnant by a vampire named, Aro Volturi. After she was born Lily Potter gave her to Aro to be watch over and so that she could be safe from The One WHo Should Not Be Named. This is a story about Rosabella Volruti Potter. Read on and see what could happen through her life.