Brethupp was a male Ewok who lived in Bright Tree Village on the forest moon of the planet Endor. He was present in the village when a group of captured Rebels were brought back by a hunting party, and watched in the village square as they were prepared for cooking in honor of C-3PO, a Rebel droid the Ewoks believed to be a god. Brethupp was then amongst the Ewoks who rushed to free the Rebels after C-3PO demonstrated his powers by levitating, although in truth the apparent miracle was caused by the Jedi Luke Skywalker, one of the captured Rebels. Following Bright Tree village's alliance with the Rebels in a battle against Imperial forces on the moon, Brethupp attended a celebration of the Empire's defeat.