Personally I would trim the sense a little, make him about the size of a medium dog, and give him his own ship. So long as he can communicate in a human language that seems like a reasonable character to me. His shell might be nigh impregnable, but I bet he has a few chinks in it for movement, so he...
Hey SCAMPS, seems I lost an arm. Are these suits heated by any chance? Put the Drone on autopilot and set a waypoint to the firing arc/range of the nearest turret. (( Surely the drones have autopilot, what sane creature would build a drone system that requires human input to work in a one man fighte...