What do you mean by “character designer” is a job that doesn’t exist?
Video games, movies, books, any entertainment has “characters” and someone has to create them, right?
Stop comparing your child to their mother, they are their own person. The problems you’re having are with her and not her mother. Give your child the grace to experience life for themself.
At this point in their life given their age your only option is to help paddle their boat, be pragmatic and help them on their journey. It isn’t your journey anymore, you’re just along for their ride.
Embrace your inner princess my dude, ride your unicorn war steed as the princesses champion.