Merlin x Fem!Reader: [Red Shoes and the Seven Dwarfs] Rewriting

[Note: I have nothing against overweight people, I watched this movie and I think snow looks better in her original form.] In this story, Snow White who is overweight while trying to look for her father, finds a pair of Red Shoes. That change her appearance. She comes across the seven dwarfs and a good witch named [Y...