- "E chu ta!"
- ―E-3PO and C-3PO
Attached to the Imperial Death Squadron, E-3PO was transported to Cloud City to serve as translator liaison with the colony's Ugnaught engineers during the hunt for Luke Skywalker. When IG-88B arrived on Bespin to capture Han Solo and stop Boba Fett from getting the bounty on the smuggler, E-3PO acted as his informant.
Unhappy with his situation on Bespin, E-3PO believed the Empire was bent on destroying him by forcing him to work with a culture specialized in the disassembly and reprocessing of salvageable droids and droid parts.
The Imperial team helping the Ugnaughts convert the carbon freezing chamber's chemical intermix ratio for Human hibernation took to calling E-3PO "E-Gregious" because of his outlandish attitude. Insulted, he left the chamber, taking time only to mumble "E chu ta!" to C-3PO standing outside the door, just before C-3PO was shot by the Imperial team in the chamber.
When the Empire left a permanent garrison on Bespin, E-3PO stayed on in Cloud City to serve as Ugnaught liaison for Captain Hugo Treece. His gruff personality continued to degrade, forcing Treece and others to reassign him from job to job.
After the Imperial occupation of Bespin ended, E-3PO came into the hands of the New Republic. New Republic Intelligence agents went over E-3PO's systems in detail expecting to uncover data valuable to the New Republic. However, the only information recovered had to do with Imperial dining and clothing etiquette, his TechSpan I module having been extracted years earlier by a frustrated technical specialist, bent on correcting the droid's personality defects permanently.
- Therefore I Am: The Tale of IG-88
- Star Wars Episode V: The Empire Strikes Back novelization (First appearance)
- Star Wars Episode V: The Empire Strikes Back junior novelization
- Star Wars: Episode V The Empire Strikes Back
- Star Wars Customizable Card Game – Cloud City Limited (Card: E-3PO) (First identified as E-3PO)
- Star Wars: Behind the Magic
- Galactic Phrase Book and Travel Guide
- Star Wars: The Action Figure Archive
- The Complete Star Wars Encyclopedia
- "Best of Hyperspace"—Star Wars Insider 89