DISCLAIMERS: The original books of the Harry Potter series belong to JK Rowling. All the characters aswell except for the ones I make up as I go along. I also do not own the Avengers or Tony Stark. They belong to Marvel Industries or whatever.Thanks! Prologue: You've all heard of the boy who lived but what about the girl who disappeared? Arabelle Narcissa Potter is the younger twin sister of Harry James Potter also known as The Boy Who Lived. That fateful night when Lord Voldemort had come to kill Harry Potter he was defeated by not only Harry but Arabelle as well. After the Dark Lord is defeated Ara disappears as Dumbledore and her godfather Remus Lupin and Uncle Sirius Black come back and help their parents. Soon all the adults rush to the twins nursery but, "Where's my Belle!" a man with messy auburn hair and glasses cried out.