Family's keeper (wtm)

What if Harry had an older sister, who is the mate of Elijah Mikaelson and Hopes favorite aunt? Harry and Lizzy return to the past to prevent and improve the future. But there are not alone: the Mikaelson family is with them and chaos is guaranteed. Should be easy, right?

Disclaimer: i dont have any rights on the originals and harry potter. These rights belong to Julie Pleck and J.K. Rowling. I only own Lizzy Potter/Mikaelson