What if Harry's got a twin sister. Harper Lily Potter. She prefers to be called Lily. What if Lily is just like Harry, but completely opposite. She got her mothers hair and dads eyes much to Harry's opposite. I DO NOT OWN THE BOOKS OR THE MOVIES. J.K. ROWLING' S DOES. I DON'T OWN ANY OF THERE CHARACTERS EXCEPT LILY AND A COUPLE SLYTHERIN KIDS.