No, I see what you meant. One big theme was the characters becoming who they truly were, not what they were shoehorned into by the story: Fakir was Drosselmeyer's descendent, not the Knight, Rue was a human girl, not Princess Kraehe the raven's daughter. Mytho was nothing but story in the first place, so he went back to being the Prince. That's why Ahiru had to become a duck in the end--Princess Tutu isn't who she truly is. In fact, arguably Ahiru and Princess Tutu are different people--and while Tutu and Mytho were in love, Ahiru was always quite happy to sit back and ship Mytho/Rue.