For me, it's the "Cannibal Shiba" from "Level Dreamworld". he's a creation that I made a while back and oh man he's weird, but maybe terrifying to encounter in my opinion. That's it, he's just terrifying, he looks cute but he's hiding a dark secret : {
Ok so what's an entity that actually terrifies you the most, answer and discuss :)
Also, here's me, but just edited with phohomosh.
Enjoy :)