Gruven was the husband of Antigra and father of Zann. He was big and strong, and a good fighter, but not too intelligent. When Sawney told Gruven's wife that their son could not be the Taggerung, Gruven challenged Sawney Rath to a fight. Sawney had always liked Gruven, and tried to talk him out of it. However, the stoat insisted, and was immediately slain by the ferret, who threw his knife straight into Gruven's throat while he was carelessly holding his shield too low. Sawney then forced Antigra to rename Zann Gruven, after his late father.