She's a singer/songwriter by trade, perhaps best known as "Rabbit" in the Steampunk-inspired group Steam Powered Giraffe. She has her own YouTube channel, where she's doing a combination of "Ask Izzy" and the obligatory monthly progress transtiion vlogs.

As with Izzy herself, her character's also changed to female, and they've incorporated it into their fictional backstory (where they're not human but "musical automatons," invented by a rich San Diego inventor in 1896 - a technological marvel that run off steam powered engines and the mysterious Blue Matter):

Rabbit's transition from male to female was explained in the backstory that the robot was originally intended to have been female, but due to time constraints (further explained in the backstory on the band's website), was left unfinished and appeared to be male. Nearly a century later, Rabbit began to malfunction badly, and in the process of repair, the robot's long-lost blueprints were located. Once the mistake was discovered, Peter Walter VI (the robots' current caretaker) completed Rabbit's build according to her original blueprints, and the malfunctions ceased (for the most part).

(From the band's Wiki page)

How about that for an analogy, then? :)