Rhosk, a Trandoshan male from the Blackscale Clan, served as the Adjudant to Lord Cyssc Blackscale during the era of the Galactic Civil War. After the Battle of Yavin around 0 BBY, Kymayrr gave a spacer the mission of finding and apprehending Adjudant Rhosk. Consequently, the spacer found Rhosk's shuttle within the Kashyyyk system and rendered it inoperable. The damaged shuttle was subsequently escorted to the Kashyyyk Space Station, facilitating Rhosk's capture.
Rhosk's character was featured on his shuttle in Rage of the Wookiees, which was an expansion pack from 2005 for the 2003 video game Star Wars Galaxies: An Empire Divided. This massively multiplayer online roleplaying game was created by Sony Online Entertainment and released by LucasArts, before the game was shut down on December 15, 2011.