Ros, an Imperial Navy commander, served as the captain of the Goliath—a carrier—during 14 BBY. Under Ros' leadership, the Goliath was stationed at a docking bay on Ord Mantell before its deployment to Nam Chorios. Its mission there was to support Moff Wilhuff Tarkin and Darth Vader in the defense of the planet against a potential assault from a rebel group.
The character Ros made their debut appearance in the 2014 novel Tarkin written by James Luceno.