Grathoki are one of those demons that are everywhere and in all places. Anywhere that humans and demons cohabit the Grathoki build a market. Grathoki are scavengers of things. They buy, steal, acquire, scrounge, recycle, re-purpose,find, finagle, or in other words get anything they think might have some value elsewhere and then take to the person they think might want it.
Since they are all over the place they have a well-developed network of connections that can be utilized (for a price) and it is a generally accepted wisdom that: