Well, Ami, here it is.

I didn't mean to make him so....ugly, but the look kinda works for him. Who needs an intimidating mask when you've got a face like that? Plus, he can chomp through steel bars no problem......

For the rest you, there's a looooooong story behind this guy I'll reveal in an upcoming fan fic.
This is also an entry to Ami the Eldest's contest (Ami's looking for Jiinchuriki and Akatsuki for a big war fan fic)