R2-D2

R2-D2 (also known as Artoo) was an astromech droid who was owned by Anakin Skywalker during the Clone Wars. R2-D2 later belonged to Leia Organa of the Rebel Alliance 19 years later. She put the plans for the Death Star inside R2. The droid later fell into the hands of Luke Skywalker, who later blew up the Death Star.

Trivia

 * R2-D2 was portrayed by Kenny Baker.
 * He and C-3PO are the only characters to appear in every film.

Appearances

 * Star Wars: The Phantom Menace
 * Star Wars: Attack of the Clones
 * Star Wars: Revenge of the Sith
 * Star Wars: A New Hope (First appearance)
 * Star Wars: The Empire Strikes Back
 * Star Wars: Return of the Jedi
 * Star Wars: The Force Awakens
 * Star Wars: The Last Jedi
 * Star Wars: The Rise of Skywalker