Although I'm not a big fan of the +1 Free Search action skill, Madame Singleton has later skills that could set her up to be able to be a speedster. Taunt can be a very helpful skill as well. Although there isn't a lot of crazy detail that makes her stand out, I do really like how the paint job turned out. The skin tones, ammo belt, and shirt look pretty neat to me. She was also super fast to paint (for me) - probably less than an hour in total.
I apparently don't see a lot of movies as this is another homage I'm not familiar with. Singleton is apparently modeled after Aunty Entity from Mad Max: Beyond the Thunderdome. I'm not sure I 100% see any distinctive features that would lock that in as the homage, but that is what boardgamegeek.com mentions.