C-3P0 is a supporting protagonist in the Kingdom Hearts Unlimited Saga, appearing in all installments set in the present day since "Birth of A New Era".
A 3PO-unit protocol droid designed to interact with organics, programmed primarily for etiquette and protocol. He is fluent in over seven million forms of communication, and developed a fussy and worry-prone personality throughout his many decades of operation. Along with his counterpart, the astromech droid R2-D2, C-3PO has constantly found himself directly involved in pivotal moments of galactic history, and aided in saving the galaxy on many occasions.