C-3PO (Earth-2356)

"I am C-3PO, Human-cyborg relations."

- C-3PO

C-3PO, sometimes spelled See-Threepio is 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 constantly found himself directly involved in pivotal moments of galactic history, and aided in saving the galaxy on many occasions.

Source

 * https://starwars.fandom.com/wiki/C-3PO.