Strangeling
These are faerie beasts with an incongruent appearance that would make an Innocent observer notice them.
They can take a large variety of jobs but they're best known as betrayers. Using the glamour they sometimes wield they can construct weirdings to entrap families then sell them off to Dark Fall markets, using a form of Establishment that slowly pushes the targets outside of reality into the clutches of the fae.
How they come into being is unknown but they are also under a bit of selection pressure, forced to become adroit at what they do.
There is a selection pressure that successful Strangelings are able to keep operating while the unsuccessful ones are stamped out.
Can be of any moral stripe just like the fea they interact with.<ref name:0>STRANGELING</ref>