I don't think Natasha is a MPDG because at least in the musical, even though Pierre is a notable presence, it's not until Act 2 that we really see Natasha primarily through his eyes. For the rest of the story, she's her own character. I would compare her more to someone like Catherine (Kitty) Bennet in Pride and Prejudice. She is definitely a literary type from a certain period down to the way she keeps reiterating that certainly she wouldn't be feeling that way, they wouldn't have kissed, she wouldn't have his letter, etc. unless she loved him. There's a thinking in the show that's markedly different (because it is entrenched in the period) from how just any character from any time period would think. There are other sort of flighty, excitable characters I could name but they spend their books growing up quickly or having their spirits crushed because, you know, 18th/19th century. But to take up the MPDG thing, the reason I prefer Denee is she comes across more manic. I think Natasha should be almost as heightened as Marya and Anatole. Sonya and to a lesser extent Pierre are the ones who should be giving more natural and grounded performances. Maybe Mary too.