Pohl, Laura. Grimrose girls (Series) #2

"At Grimrose Académie, the fairy-tale deaths continue. And unless the curse is broken, one of the girls could be next. Nani, Yuki, Ella, and Rory have discovered the truth about the curse that's left a trail of dead bodies at Grimrose. But the four still know nothing of its origins, or how to stop the cycle of doomed fates. And each girl harbors her own secret. One is learning why she was brought to the school. One struggles to keep her new and deadly power under control. One knows exactly how much time she has left. And one, trying to escape her dark destiny, will come even closer to fulfilling it. Can the girls change their own stories and break the curse? Or must one of them die to end it forever?"-- goodreads.com