I saw the animal companion listing as well, and it's what gave me the idea for the entire character. But my DM says that entry is a third-party thing, and wants to stick to the Paizo monstrous entry instead. So *shrug* what can you do?
While the idea of a dragon instead is appealing, I like the character I've written up so far, so I'll stick with the Cooshee. If it doesn't work, it doesn't work. I think I will go with barbarian for its levels (assuming Urban Barbarian is allowed), otherwise I'll go Lore Warden. Thanks guys.