Tank and Truck

Tank and Truck, collectively known as the murderflies, are women who work as butterfly fighters. In 3012, they were opponents of Amy and Leela.

Production
In 2012, Countdown to Futurama introduced Truck as "Tank" through a character design (released on 30 May) and, through the fifth Futurama podcast (released on 5 June), revealed her actual name, revealed that Tank and Truck were both "really tough characters" and the production team "got very confused themselves over which one was which" and revealed that she was played by Tress MacNeille.

Trivia

 * Futurama writer Michael Rowe - who wrote "The Butterjunk Effect" - said in the podcast that Tank looks, to him, a little like American performer.