R2-D2  A loyal and dependable astromech droid well equipped for starship repair and computer interface、 even after decades of service、 R2-D2 continues to be full of surprises. C-3PO  A fastidious and worry prone protocol droid、 C-3PO longs for more peaceful times、 but his continued service to Princess Leia keeps him in the frontline of galactic conflict.