EXS-24 Exo-Suit
While creating multiple different weapons for the government, Dr. Scott created the EXS units, most were scrapped, but the 24th and 25th units (25 being Eli himself) were kept functional for further research. After the attack that ended with everyone in the compounds deaths Eli searched the compound and discovered unit 24 (originally designed to enhance human soldiers capabilities), still in its development harness. 24 did not have an AI system, but could follow most commands. Eli than modified 24's internal structure to be compatible with his own internal technology, Allowing it to either fight on it's own or merge with him to enhance both units combat capabilities.