Elsa

Elsa is one of the supporting protagonists in the movie, We're Back, A Dinosaur's Story. She is a purple pterodactyl and is voiced by Felicity Kendal. She is later mutated into a monstrous form by Professor Screweyes until Louie and the gang turned her back to normal, along with the other dinosaurs.

http://images2.wikia.nocookie.net/dino/images/7/70/Elsa.jpg