Cam the Cinnamon Cat's a sneaky one. He's a cat, so sometimes they're like that. He smells like sweet Cinnamon, but don't let that fool you! Careful if you loan him money: he'll pay you back. Eventually ...
Obviously, don't nominate any human characters. Hybrids like Cheetah or The Lizard are okay, as are shapeshifters with one set animal form (eg Professor McGonagall.)