C-3PO

C-3PO was a golden protocol droid and the best friend of R2-D2. He was fluent in six million forms of communication. C-3PO was built by a young Anakin Skywalker before the Clone Wars, and since then had been owned by Jawas, then Luke Skywalker and was finally taken in by the Resistance. Sometime after the Battle of Endor, C-3PO was fitted with a red protocol droid's arm for an unknown reason. C-3PO assisted the Resistance on D'Qar during the Battle of Starkiller Base.