Jade Potter the forbidden Slytherin is the sister of Harry Potter, by blood not choice. When she was sorted into Slytherin she automatically became best friends with Draco Malfoy, Blaise Zabini, Theodore Nott, Pansy Parkinson, Millicent Bulstrode, Daphne Greengrass and Sillena King. But when the time comes she must decide blood or love. ( Lilly and James are not dead only a VERY UNLUCKY babysitter) Just so you know all characters except Sillena and Jade are JK Rowling