Hmm... well I'm certainly not in any way believing that I can have a permanent effect on her condition. I have enough trouble with all the wanderering beings who come trying to find me to prove that I'm only good at short-term control. (IMG:
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Yes, I know what you mean with depression - they did similar things to me for it, but I eventually managed to overcome it on my own.
I was more wondering about the psychotic end of the spectrum rather than neuroses.
A few things I should have noted about my friend:
Firstly, it turned out that she was VERY sensitive to energy movements. She could sense the ki I was pumping through her (after the third attack of the voices, she asked me why she felt like she'd been shot - "Not like something painful entering my head... but-" "Like something passing through your skull, and out the other side and onwards to infinity?" "Mhmm"). To my mind, given her past and her mental state, I'd say that leaves her as very open to any invading presence, but without any defenses.
Secondly, the specific... persuasion technique I had to use on her voices was interesting. Simple projected commands like "let her go", "leave her be" and so on had little effect. The one that made them disappear faster than a possum up a tree was "If you don't leave, I'll resort to calling up Raphael". That one almost always worked, and the one time it didn't, a mere mention of Michael sent them packing.