This is the Ring of Earth. I haven't found a name I like for him yet, so if there are any suggestions, I'd love to hear them.
His main weapons are the spikes you see on his wrist bracers. Connected to the Atlas Chains, they can be launched with tremendous velocity by channeling the mech's azuthite energy stores into the chains, and forcing them to expand rapidly. This propels them out of their coil chambers, and help the unit grapple objects much larger than itself.
It's strength is tremendous.