R4-I9 was an R4 astromech droid with masculine programming, dark blue panelling and a black sensor who served the Galactic Empire. The Resistance droid R0-GR wrote about R4-I9 and his fellow Imperial R-series droid R2-Q5 in his Droidography, where he claimed that based on the color of the two Imperial droid's panelling you could tell that they were trouble.
In the new Star Wars canon, R4-I9 was first pictured on a card in the 2015 Topps Star Wars Force Attax The Force Awakens series of cards released in 2015. The droid's name was then provided by the 2017 reference book Star Wars: The Visual Encyclopedia, which was written by Adam Bray, Tricia Barr and Cole Horton. the droid originated in the Star Wars Legends continuity, where it first appeared in the 1998 reference book Star Wars: The Visual Dictionary, which was written by David West Reynolds.
- Star Wars Helmet Collection 9
- Star Wars: The Visual Encyclopedia
- Star Wars: Droidography