The Mimic was a prototype Super-Soldier, said to be one of the first of many "Next Generation" Super-Soldiers created to eventually replace the New Ultimates.
Death
When the New Ultimates derailed the train which was transporting the Mimic, as well as the other Super-Soldiers, his containment unit was ruptured and he was mortally wounded. He managed to have a brief conversation with the New Ultimates, telling Captain America how much he admires and respects him, before he died in Scott Lang's arms.[1]