Dame Lady Madame is a prestigious female Mechanical of high-society who made her first appearance in "The Party."
Despite her calm demeanor and silken tone, she does possess some coldness within her just as any high-society individual, much like Arpa Default. When Robot Default, in a desperate attempt to make a good impression and not embarrass his family, nervously joked how "it's funny when others are miserable." Lady Madame agreed with a callous smile.
Arpa thinks highly of her, especially since she is the writer for high-society's news column, and her opinions are of mass importance to the Default family, which was why they try and exclude Robot from such elegant events as shown in "The Party."
- She is one of a few Mechanicals who is actually dressed in clothing, along with Ogo, Crazy Cousin Gizmo, Crikey, Sir Cranklin, and Hal Worth-A-Ton.
- Her outfit and jewelry greatly reference Queen Elizabeth II; she also wears a brooch almost similar to the one Queen Elizabeth wears in most of her photos.
- Her hat is very similar to the one Wendie Malick's character wore near the end of Racing Stripes.
- She is the fifth female Mechanical to appear in the series (the first four are Spitfire, Lucy, Grandma, and Arpa).