Big Bertha

Big Bertha is a Robo-Hungarian artist with a cannon stomach who shoots robots through the air. She is the grande dame of Circus Roboticus. This fembot is assumably old, but doesn't want to be put in a new body. She also says the Professor (in Bender's body) reminds her of herself as a young cannon, which seems to indicate that she is extremely ancient. Robots are known to be capable of living for hundreds of years, so it is a possibility.

After launching the bending Professor onto the United Nations General Assembly roof, she was badly injured. However, it's likely she was restored by Fishy Joe, the owner of the circus she works in.

Trivia

 * She is a reference to the German.
 * Her voice is a lot similar to that of the Gypsy, also voiced by Tress MacNeille.