Grarwwaar's story involves him being a member of a Wookiee warrior band that sought to locate Rulan Prolik within the perilous Shadowlands. Tragically, Rulan isolated Grarwwaar from his fellow warriors, subsequently murdering him in cold blood and then impersonating the Wookiee. Nevertheless, the truth of Grarwwaar's demise was recorded in a datapad by another Wookiee who knew him, thus revealing Rulan's deception to anyone searching for him.
The character Grarwwaar is only present should the player choose the dark side path, which involves eliminating Rulan Prolik on behalf of Hulas during the GenoHaradan questline. Rulan's dialogue suggests Grarwwaar was trying to find refuge from Humans in the Shadowlands.