Mollie is an interesting character, for her character arc isn’t so much about her changes, but the reveal of her true self. From the beginning she seems perfectly normal, a little self serving, but mainly a good person. The Battle of the Cowshed is a turning point for how the animals feel about her. George Orwell did a good job on slowly revealing Mollie’s true nature, and relating her to the stuck-up, wealthy bourgeois who flaked out during the Russian Revolution for selfish reasons. Mollie didn’t as so much change, but her ditsy show pony facade fade.