Ungatt Trunn was the notorious wildcat warlord leader of the Blue Hordes, the son of King Mortspear, elder brother of Verdauga Greeneyes, uncle of Tsarmina and Gingivere Greeneyes, and a distant relative of Squire Julian Gingevere. Trunn's list of titles included "Ruler of the Earth," "The Fearsome Beast," and "The Earth Shaker," but any title including his father's name was rejected, as seen when Grand Fragorl mentioned him being "The Son of King Mortspear." His weapons of choice were a trident and a cutlass.
Trunn derived a great deal of his knowledge from spiders, or so he said. His leadership style hardly reflected that, with capricious promotions and almost paranoid executions. However, he was a cunning and skillful commander, amongst the few attackers ever to breach the mountain fortress of Salamandastron, and the only one to actually conquer it. He was also a skilled fighter, being one of the few villains that was able to fight a badger on even terms.
In battle, he used sheer numbers - and intimidation derived thereof - as his most powerful weapon. His most trusted associates were the Grand Fragorl, High Magician Groddil, Captain in Chief Karangool and later Captain Ripfang. He called any creature that wasn't in his hordes "lesser orders" and announced himself better than them. His hordes fought in a zealot-like style, hurling themselves at their enemies regardless of their own lives.
One of Trunn's battle strategies involved tricking his enemies into believing the stars had fallen from the sky. He accomplished this by having every horde member carry a torch, which was to be lighted upon a signal from Groddil. The intensity of the light made the stars no longer appear to be visible to the eye.
He was defeated in battle by Lord Brocktree, who crippled the wildcat by snapping his spine, and tossed him into the sea. He later washed up on shore some distance away, where Groddil was sitting. He begged Groddil to save him, but Groddil — perhaps in retribution for Trunn killing his family in the past or for throwing him in the cellars of Salamandastron — allowed the wildcat to be washed out to sea, where he presumably drowned.