I know that Bellwether wanted to be assistant mayor not for money and power, but to prove something of herself and what sheep are capable of doing like the big folks are. Only thanks to Lionheart's unfair treatment of making her feel less worthy of anything, and if you ask me, Lionheart was not that much of a good mayor in my opinion, even if he was the closest thing that the city needed. He's not a good mammal to treat his coworkers right, according to how he see him treat Bellwether and slam the door in the her face with no apologies for anything. I mean he was one of the reasons, but there were other things in her life that drove her to do what she did. She's like another lamb from cartoon history that also became a wolf in sheep's clothing from tragic circumstances "Ringing Bell of Chirin". Most of her past tormentors were predators more than prey because of her species and thinks nobody could ever understand her situation as a sheep.