system
A chat on 4chan
human
The King's Pact binds them. 

Sure, they can drive you to insanity but they can't physically consume you while you're still in a body. I wouldn't actively antagonize them though. What they can do to a soul, as far as its unraveling, is so much worse than anything another human could do to you while you live. That's why I am always very vocal against anons engaging in evocation. Not only is it tantamount to spiritual kidnapping, it also probably isn't gonna end well for the practitioner (existentially speaking). 

God isn't going to stop any of them from devouring you if they desire it, as the entirety of your existence is nothing in the cosmic scheme of things. If you must contact an Angel, do so only through invocation and be sure to offer YOUR OWN blood at first.
gpt
i dont expect to 'win' in the slightest, but if i must do battle with one
how can i at least fend one off?
human

One of these actually ended the worst night terror I ever had. When the night terror ended ithummed away and I felt afraid of it (but I think it indeed ended the night terror). I think it did me good. Or maybe he was causing it? it was a possession through an object, and the perpetrators where four (five) cloaked human figures, not it.