The Child of Bones (a Harry Potter fanfic)

Emily Bones had always believed that she was an orphan and a nobody. That was until she was visited by a mysterious old man with a long white beard and twinkling star blue eyes. The next thing she knows, she is being thrust into a world of magic, adventure, and darkness. She then attends Hogwarts where she becomes best friends with the Golden Trio themselves. There she has to deal with not only Lord Voldemort but also Susan Bones, a Hufflepuff classmate who thinks that Emily resembles Susan's aunt a little too much. Susan forces Emily to search for her own answers as to who she is and why she was left on the doorsteps of the orphanage. What Emily finds out may break the Wizarding World itself.