I have encountered entities that seem to be highly empathic in nature. You know those people who are constantly fighting depression and negativity and cannot seem to get rid of it no matter what?
I have found that it is usually very spiritual in nature. These entities are highly empathic. They channel repressed emotions and broadcast them in the front of people's minds. The average person recoils and jumps back. Disassociating themselves which allows these beings to slowly make their home. Until. Full blown possession.
You know those nasty people who preach "love light peace and destroy anything EVIL!!" Those sorted are usually quite taken over.