Found At Last

Set during Harry Potter and the Order of the Phoenix. Leah, age 15, has lived at an orphanage all her life. After being adopted by one Bellatrix Lestrange, she gets a terrifying introduction to the Wizarding World. After escaping to Hogwarts, she finds her only remaining family member: Harry Potter. AU, Bellatrix out of Azkaban before OOTP.