The multi-armed medical droid FX-7 was stationed at Echo Base on Hoth, serving as an assistant to the medical droid 2-1B. FX-7 played a crucial role in saving Luke Skywalker after a vicious wampa attack and a night spent in the freezing temperatures of Hoth. Thanks to FX-7's excellent medical treatment programs and the bacta tank, Luke's life was spared.