I don't think Frankie ever had an IF either, simply because she grew up around so many, she never felt the need to create her own. Which also brings me to the speculation that, isn't Duchess older than Frankie? From "The Big Picture" we see that Wilt and Duchess were the first friends Madame F seemed to have taken in. And Frankie wasn't even in the pictures yet for another few years (and then appeared to be maybe 3 or 4 years old). Of course we have no proof but I always saw Duchess to be the oldest friend, maybe as old or even older than Uncle Pockets. So to sum up, I personally don't think Duchess is Frankie's IF. Although the idea that IFs are the "opposite" f their creator, it does kind of fit, heh.
