a) Is she a Christian? If so, and she can be IN this world but not OF it, she will do fine, but only insofar as she does not lose faith. b) is she well immunized from mental illness? (e.g., Does she know not to take personal offense at another’s mental illness and just carry on, normally? Can/will she avoid attempting to engage in logical arguments with irrational people? Can she maintain objectivity under duress? Can she defend herself when confronted by a lunatic by acting even crazier if needed and moving to safety?)
If these are true, she will be fine. Otherwise, it will not end well.
In regards to Physically defending herself, fwiw she became a black belt in karate at age 13, has sparred with my marine corp brother, has shot all different types of guns and weaponry that shall remain nameless because we live in NY. This is a concern as a mom-- she was on the homecoming court last year. This says to me as a mom that while I have always thought of her as pretty, so do her peers. Maybe a dumb question but how are very pretty girls treated in the military?