Leonardo di ser Piero da Vinci, better known as Leonardo da Vinci or simply Leonardo, was a polymath whose areas of expertise spanned many forms of art and science. In the TMNT franchise he is best known for being the eponym of the Turtle Leonardo. His painting known as the Mona Lisa was the eponym for the character of that name..
Savanti Juliet summoned a quartet of notable figures from history to confront the Ninja Turtles - Bruce Lee, Mae West, Robert E. Howard, and Leonardo da Vinci. Naturally, da Vinci faced his namesake, defeating him with nothing more than a paintbrush, by painting a swirl on his plastron.