Grimslade is a cruel bounty hunter who tracks down animals for a living. He is equipped with various magical gadgets made from the evil cave shamans of Stalagmos, who dwindle in the dark arts. These include his Olfax tracking snout, which can track any smell, and his shadow hounds, dog-like creatures made of shadows.
He appears in book one, The Familiars, as an enemy to Aldwyn and his friends, who is constantly tracking down them for a great bounty made by Paksahara disguised as Queen Loranella. He was also in book three, Circle of Heroes, paid by the real queen to track down the First Phylum. He met his demise when devoured by a vicious zombie crocodile.