The animation is very well done. The collar looks like it's part of the helmet, to me. But I like how you did the chicken legs, so it's more apparent that it's a robot.
I took the liberty of doing a quick edit myself. Mostly I focused on trying to give a bit more contrast, since it's such a tiny sprite. Also tried to do away with some of the pillow shading. And I made the thighs shorter, because I don't really understand how the legs would work on your model. They seem out of proportion.
I also took the liberty of suggesting another kind of sword, because even though I like your animation, I'm not thrilled about the idea of him holding a beam of energy like it was a rod. Being a huge fan of Soul Reaver, I think I would just copy the Soul Reaver sword


I could work on this sprite for hours, it was a very fun challenge. Especially after reading the cluster study thread.