C-3PO is a protocol droid designed to serve humans, and boasts that he is fluent in "over six million forms of communication". He is generally seen with his long-time counterpart, R2-D2. Threepio's main function is to assist etiquette, customs, and translation, so that meetings of different cultures run smoothly. Threepio and R2-D2 played a vital and pivotal role in the Galaxy's history.
C-3PO appeared in the attraction's queue with R2-D2 working on fixing a Starspeeder as well as appearing in the in-cabin load and unload spiels.
Star Tours: The Adventures Continue
C-3PO appears in the attraction as the accidental pilot of the attraction in addition to appearing in the queue like the original attraction. When doing some routine checkups on a Starspeeder 1000, he is locked in the pilot's seat and is forced to take control of the vehicle, escape Imperial forces after a Rebel Spy on board and get said spy to safety.