That One Evil Twin

14 years ago Lily and James Potter were killed, 14 years ago Harry and Leilah Potter were orphaned, 4 years ago Harry Potter went to Hogwarts and Leilah to Ilvermorny, 4 days ago Leilah Potter returned to Britain to attend Hogwarts with her brother, now both siblings have to learn how to get along. After 4 years apart they have grown very different and when Leilah gets sorted into her brothers rival house and befriends her brothers enemies, people soon realise that Leilah is not what they expected. However, the two Potters friendship could be the difference between life and death...