The Imps want us back.
It’s hard to describe who these Imps are. Anything Google turns up is only partly true. British Isles mythology knows lots of such creatures — but there is no one species that neatly correlates with our Imps.
Imps ARE pranksters — but not tricksters. They make mischief, but never out of malice — although it’s maddening when they hide things. Sometimes they will deliberately lead you astray — but later on you discover that they guided you away from almost certain harm. Imps are also great story-tellers and have a bone-dry sense of humor. They love cats.
Imps don’t have wings — but they can disappear and reappear at will — and so have no need of flight. They are also shape shifters — and often manifest as full-sized human adults. If you have ever worked with the public, you will have encountered Imps. They love to be around people — but prefer not to draw attention to themselves.