Samurai Princess

As group of young schoolgirls walking through the woods is attacked and raped by a gang of thugs. Only one of the girls survives, but is badly injured. She is found by a scientist who takes her back to his lab, gives her a new robotic body and a female monk gives her magical powers. They send her out to take revenge on her attackers, but as it turns out he has an ulterior motive for his actions.