Water and Air: A Waterfire Saga reincarnation fanfic.

What if Serafina and Desiderio had a younger sister? What if she was a human in her past life who remembered everything and read the books? 'My last life had been as unremarkable as could be. Now I have this chance and I sure as hell won't waste it. I had a head-start and I had better get cracking, even if I have t...