I had a couple classmates that pretended to be vampires back in elementary and middle school. They’d pretend their Koolaid was blood, complain about the sunlight, and bite their friends a lot. Not enough to draw blood, though. I haven’t kept up with most of them, but one guy is a teacher now. He seems pretty normal.
I see that “I am a vessel to an archangel” so often from people with a loose grasp of reality. I wonder which mental health issue makes people think they have angels in them…