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.
Is not a supernatural thing but a girl pretended to be a cat. Apparently this is kinda common? Or at least since then I seen a few people online say a girl at their school also pretended to be a cat? I think we were 10. Anyway I don’t know how she is now because she left about the year later and idk her last name to look her up.