Meg | Supernatural | OTA | 14
There are very few creatures that strike fear into the hearts of demons - not literally since they don't actually have hearts, but their meatsuits do and that counts. Angels, obviously, are the most terrifying. After all, no demon likes the idea of being smote or blown to smithereens with so much as a single thought. Leviathan are almost as terrifying. Any beast that can kill angels is kind of up there on the big bad list.
But also on that list are hellhounds. The demonic pitbulls of Hell. Sure, it's all well and good when you're the one calling the shots and holding the proverbial leash. When you're on the other side? Not so good.
Of course, being a demon, Meg had one advantage over almost anyone else in her situation. At least she could see the damn things.