His name IS AC-0128 but his real name is Derek but he doesn't remember his real name, hell, not even his family or friends.. or anything when he was a human really. When he was a human he got into a tragic accident causing his brain and consciousness to be transfered into a robot vessel by scientists, but he doesn't know that.. He is always serious and never jokes around He uses firearms such as shotguns and snipers only He sees as someone who needs protecting.