A2H-RB

R4-M9 was an Imperial astromech droid of the R4 astromech. It received regular memory wipes, and as a result did not possess any distinctive personality traits. In 0 BBY, it served within the vault of the Citadel on Scarif, searching for needed maintenance and performing computer network sweeps to locate any discrepancies.

Appearances

 * Rogue One: A Star Wars Story