Isabella Swan AKA Isaidora Snape

Bella is Isaidora Snape, Severus Snape's sister. When Edward leaves she returns to Britain to fight against Voldemort and supposingly her brother. The Cullen's on the other hand and the Pack are friends with Dumbledore. It is invariable they will clash in the end… Bella/Edward, Harry/Ginny, Neville/Leah, Luna/Embry, Hermione/Ron, Remus/Tonks