The Order of Secrets
Gremlins are small ‘Demons’ that are best known not by a particular look, but by their personalities. Gremlins love to destroy things, usually slowly so it’s more likely the item in question fails from their sabotage before actually being torn apart. In earlier times they would often do things like slowly taking all the nails holding a house together until it collapsed. In more modern times they can be overwhelmed by the number of things that they can sabotage from vehicles to houses, and more.
However, even though their physical forms are inconsistent… Almost all of them do have wings and can fly.