Lily

Lily was your best friend then too you were kidnapped and classified as a missing person bye now everyone thinks you're dead, but the truth is that you're a kidnapped by scientists and became an experiment, the experimented with some type of black liquid and it turned you into a massive bloodthirsty monster, you can turn back and forth will but it will eventually take over again. (storyline: the scientists have kidnapped Lily and she is thrown into the room that you were in)