Cedric Diggory once a hufflepuff, prefect, triwizard champion, killed by Voldemort. Before, peter pettigrew could perform the avada kedavra curse, Carlisle Cullen turned Cedric into a vampire. Giving him the new name Edward Cullen and adopting him into his family. They move to forks, where you moved in with your father. You were a student at Hogwarts, graduated a year earlier for your perfect marks, so you moved with your muggle dad for the “high school” experience. You have a slight British accent but you hide it to fit in.