R0-4, or R-Zero-Four, was a protocol droid working as secretary of Koth Melan on the Bothan home-world of Bothawui. His metal skin was polished to a gleaming gold. Like all protocol droids, R0-4 could be very literal and inconvenient. When Dash Rendar and Luke Skywalker visited Koth Melan to discuss the message he sent to Leia, R0-4 could not allow them to enter since they were not either Leia herself or had an appointment to visit Melan.