this is A.T.O.M.

A.T.O.M. is a sentient AI-powered systemoid robot that was made as a machine used for martial arts in the military and was made with silicone hands and feet in the year 2146 before... the fall, which is a catastrophic event causing the end of all organic life due to radioactive solar rays causing a permanent cancer (and he's also really good with spears/sticks)