From the seventh son to princess?

During the 1st Wizarding War, the Weasley family's youngest son was kiddnaped by Death Eaters and was thought to be dead .... only he didn't die. He was found by a heartbroken Emperor in the royal rose garden, their magics combinded the two as blood relatives, changing the baby's fetures but also gender?!?!?!
Now Princess Rosalita de Alger Obelia, daughter of Emperor Claude has gotten a letter from an owl inviting her to a magical school, but during the shopping trip her long lost past catchs up to her.
Will she choose the one she calls 'Papa' or the family who wants her back?