At the Battle of Kur, the Tempest was cornered by a joint task force of Galactic Republic and Jedi forces, as well as a flotilla of Eriaduan cruisers. Although the Nihil employed a devastating array of cruel tactics at the battle, they were ultimately routed by the Republic forces. Gravhan was one of the last survivors aboard Milliko's flagship, the New Elite, when it was boarded by Eriaduan soldiers, who killed all aboard.
As a member of the Chevin species, Gravhan had tusks, a large head that had wisps of long blond hair, and wrinkled gray skin.