As their name implies, Nethorks resemble red or black-skinned orcs with wings, many small horns, and long tusks. They favor long daggers as weapons and are masters of stealth.
Nethorks whisper into the minds of mortals, goading them into betraying even their own friends and family at every turn. They are master assassins and favor assassins as their mortal allies (and victims).
Demon-kin spawn of Nethorks look much like their parents. They are habitual traitors and cannot be trusted to remain loyal to anyone, and they encourage treachery in others.