Ok- in the tv version, that would be Park Overall. She was "weak", in the sense that the fbi were able to get her to wire her motel room and get Eileen Wornoos on tape confessing or at least partially confessing. The girlfriend was facsinated by living a "bad life" and a follower.
Eileen's first rape was by an uncle or father at age 7. (According to what I've read but it's been a while). She was very much neglected as a child and sexually abused. Left home while still a young teen.