Grainger is a Worf (a Troll) is the only known member of the Worf clan. He has taken up residence within the ruins of the city of Tormor and claims it for himself.
At only three feet tall his long slinder blueish/green skincast an eerie appearance. He is very much an eerie character. From the moment MS&L meet Grainger, one cannot determine to whom his allgance lays. His true alligance is only show in Book 4.
Grainger has the power to touch those he does not like and turn them into nothing more than thin air. For every good deed Grainger does, it appears he does a bad deed in return.