R7-D4/Legends

R7-D4 was an Astromech droid that helped aboard Jedi Master Plo Koon's Delta-7B starfighter, Blade of Dorin. He had brown markings and was a veteran of numerous battles. Plo Koon refused to give him a memory wipe, being unwilling to lose the droid's personality.

History
R7-D4 was Jedi Master Plo Koon's copilot for Blade of Dorin, his Delta-7B Aethersprite-class light interceptor during the Battle of the Kaliida Nebula. Before the battle, Plo Koon accompanied Anakin Skywalker, his Padawan Ahsoka Tano and Shadow Squadron through the Balmorra Run, in which they encountered Neebray mantas. Arriving near the Kaliida Shoals Medical Center, the squadron engaged the Malevolence, and were able to damage its ion cannons, and when they were used, they exploded and further damaged the Separatist warship.

Behind the scenes
If R7-D4 is indeed an R7-series astromech droid, and not just an earlier model with an "R7" designation, his inclusion poses a continuity problem, as R7 units had not been created until after the Galactic Civil War. The same is also the case with Ahsoka Tano's astromech, R7-A7.

Appearances

 * Star Wars: The Clone Wars Volume 1: Shipyards of Doom
 * Star Wars: The Clone Wars: Lightsaber Duels
 * Star Wars: The Clone Wars: Lightsaber Duels
 * Star Wars: The Clone Wars: Lightsaber Duels

Notes and references
R7-F5 R7-D4