At first glance, the Rake seems to be a cold-blooded killer, with no remorse for its victims, but, in reality, Angela Raike was just bullied and mocked by other girls for acting like a boy, so, one night, her rage manifested itself inside her and she became the Rake. She learned to control this form, and, at last, got her revenge on the leader of the group who jeered at her.
Ok, enough backstory.
Angela is psychologically damaged. Pure and simple. She's normally a carefree girl, but there comes the tension point where she breaks entirely and goes completely berserk. She is able to morph her hands into long, razor-sharp claws, and effectively become a creature of the night, complete with a terrifying screech. She is the stealth ops member of Team Operator.