Bellwether is a female sheep and the main villain of Zootopia.
About her
Though, at first glance, she seems to be a friendly character, she is, at the end, revealed to be the villain of the film, responsible for the crisis of predators going savage. She cared nothing for who she hurt to stay in power.
Roles
As Maleficent in Sleeping Bunny
She is the mistress of all evil
As Ursula in The Little Mer-Bunny
She is an evil sea witch
As The Evil Queen in Judy Hopps and the Seven Anthros
She is an evil queen
As one of the fates in Nickcules
She is a figure of Greek mythology