R2-D2 was an astromech droid and undoubtedly the most famous unit of the R2 series. A longtime friend and counterpart of the protocol droid C-3PO, he served the Skywalker family faithfully for many years. Along with his resourcefulness, R2-D2 was equipped by his original owners, the Royal House of Naboo and the Royal Naboo Starfighter Corps, with many tool-tipped appendages that allowed him to serve as a superior starship mechanic and computer interface specialist.