[Geckz]

I know you have a specific car type in mind, but what if she changes into a different type of car depending on certain conditions?

Just as an example, if she eats lots of lean meat, she becomes a sport coupe; she eats healthy, she becomes an electric car; etc. It doesn't have to be diet, I just used that as an example. She could keep some feature as a trademark feature to identify the car as 'her' though.