Wesfeys are (in-universe) creations of the Wesley the God-King, and are sometimes referred to as his "servants". They are what people transform into when under the influence of his magic.

They're mammals with spindly bodies, flexible noodly limbs, feathery tails, and no mouth, anus or genitals. They have no individual identity, nor are they a hivemind. They're all identical and basically drones, having little care in the world besides cuddling, mating (or at least trying to) and pleasing their master.