R0-B5U functioned as an astromech droid for Yarvok within the Nova Blades pirate organization. As part of the Dantooine Incursion, R0-B5U was positioned at the Dantooine Power Station's entry point, tasked with collecting ransom payments of fifteen million credits in return for the reactor's safety.
This character, R0-B5U, initially appeared in Star Wars: The Old Republic, a video game, specifically within the Knights of the Eternal Throne expansion pack. Should the player provide R0-B5U with the fifteen million credits demanded by Yarvok, the Nova Blades will withdraw without conflict; conversely, should the player refuse payment, Yarvok must be overcome in combat to force the pirates' departure.