Awesome jobs so far guys!
And yes scorge, NIN always helps. With everything.
Here´s my attempt -
Will probably stick to a heavy Berserker-typ, a bit Gorilla-like. For defense, its got thick skin and bone-plates on the side of its arms to protect allies, and a long strap hanging down from its neck to protect that weak spot. Aside from its arms, its tail has spikes on top while the downside can be used as a hammer to smash enemies.
Its mouth only seems to be a mouth, the 'head' actually claps over to reveal a gaping hole with teeth, as well as its eyes, which are also being protected in there. Since it can only orientate by hearing, it will go into berserk-mode pretty easily - but it will open its mouth just a bit so that the eyes can see when its needed.
Will probably depict a scene where it breaks free from its chains to rush into battle.
The head will become smaller, the arms longer and the torso more massive.