E-3POwas a silver 3PO protocol droid with yellow photoreceptors who was present in Cloud City, a tibanna gas mining colony that floated in the Life Zone of the planet Bespin, shortly after the Battle of Hoth. After exiting a room of Imperial stormtroopers, it was greeted by a fellow 3PO unit known as C-3PO but responded with a Huttese insult and continued down the hallway. After calling the protocol droid rude, C-3PO heard an R2-series astromech droid inside the room that E-3PO had exited and, believing that it was his friend R2-D2, entered to investigate the sound. However, instead of finding R2, he was blasted to pieces by stormtroopers.