These are original character's from Rebecca's own creation. There are three anthro girls and their respective monster form. According to Rebecca's story these three are trained spies who at night transform and hunt men. "One kills him, the other cuts him and the other cooks him". Then they all eat him.

Yeah, I know. It runs in the family.
https://lh3.googleusercontent.com/-.....4+19.00.46.jpg