C-3PO longs for more peaceful times, but his continued service to the Resistance — and his knowledge of more than seven million forms of communication — keeps the worry-prone droid in the frontlines of galactic conflict. Programmed for etiquette and protocol, Threepio was built by a young Anakin Skywalker, and has been a constant companion to astromech R2-D2. Over the years, he was involved in some of the galaxy’s most defining moments and thrilling battles. Since the Empire’s defeat, C-3PO has served Leia Organa, head of a Resistance spy ring aimed at undermining the First Order.
from – C-3PO (See-Threepio) | StarWars.com