The ever-faithful R2-D2 (Artoo-Detoo) is a feisty astromech droid of surprising determination and resourcefulness. Communicating in a variety of beeps and whistles, Artoo's cylindrical body is equipped with multiple instruments and sensors designed to carry out his primary utility droid functions. Along with his tall, golden counterpart C-3PO, Artoo frequently finds himself coming to the aid of his human masters. Artoo had served as Anakin's astromech droid until the time of his fall from grace. Artoo knows exactly what's going on in the galaxy, and is simply biding his time until he is once again called to active duty.