Minx Fairies are not quite the same as most other species of Fairy. Most, grow to be the size of fully grown humans, and can be easily mistaken for humans.
How are Minx Fairies like this? It is merely a matter of genetic evolution.
Of course, Minx Fairies weren't always predators either. That wasn't genetic evolution, just a matter of a single Minx' curiosity getting the better of her, and that spreading onto the next generation, and onward and onward.
Now, what is a Minx Fairy's favorite large meal?
Human girls.
The Fairy finds that the bodies of human girls are very slender, easy to swallow whole. Also, their bodies are very easy to digest.
Only the females hunt, while the males care for their young. So, this Minx Fairy you're about to adventure as, is a female.
Ready to take off?