hademon
A hademon is a human with a demon inside, and you only get one every 294 years. If you find one, you’re the luckiest person on Earth. They’re nice, but they’ll ruin your life if you don’t treat them right.
I dated a hademon and now I live in a closet.
The hademon in my neighborhood eats my homework.
My brother’s hademon friend turned his math teacher into a chicken.