C-3PO is a humanoid protocol droid fluent, by his own account, in over six million forms of communication — the StarWars.com Databank puts it at "more than seven million" by the sequel era. He is 1.77 metres tall, was built on Tatooine by the young Anakin Skywalker, and has been performed by Anthony Daniels in every numbered film of the saga. He was introduced in Star Wars: Episode IV A New Hope (1977).
The only character in every film
Daniels' unbroken run is a genuine oddity in blockbuster cinema and it makes Threepio the saga's continuity thread by default. He is on Naboo, on Geonosis, on the Tantive IV, in Cloud City, on Endor, on Exegol. He is also, almost always, the person in the room least equipped to be there.
Comedy as structure
The prequels made him Anakin's handiwork, which retroactively turned a comic-relief butler into a piece of the tragedy: the boy who built a droid to help his mother ends up as the machine his own children flee inside. Whether that reads as elegant or as over-tidy is one of the durable arguments in Star Wars criticism, and both readings are defensible.
He is repeatedly wiped
His memory is erased at the end of Revenge of the Sith and again, at his own suggestion, in The Rise of Skywalker. The saga's most consistent presence is also its least continuous person, and the films keep using that for jokes rather than for grief — a choice that The Rise of Skywalker, briefly, reconsiders.
Worshipped by Ewoks
The Databank's own summary lists the indignities in order: "dismantled, memory-wiped, worshipped by Ewoks." Return of the Jedi hands him the film's actual diplomatic victory — the Bright Tree Village alliance is his — while framing it as a gag. He is the saga's most underrated negotiator.
The comics gave him a solo career
He headlined Star Comics' Droids in 1986 with R2-D2, an all-ages series that treated the two of them as a travelling double act, and he has been a fixture of Marvel's 1977 and 2015 runs throughout.
Continuity
Canon and Legends both, with no meaningful divergence in the character himself. Legends gave him a longer post-Jedi career alongside the Solo children; canon simply keeps him in service to the Resistance.
