E.M.M.I. Unit is a central antagonist in the video game 'Metroid Dread'. The E.M.M.I. (Extraplanetary Multiform Mobile Identifier) are highly advanced research robots developed by the Galactic Federation. In the game, these units are corrupted by an unknown force and become relentless hunters of the protagonist, Samus Aran. They patrol specific zones and are nearly invincible, creating intense stealth and escape gameplay moments. Their presence adds considerable tension and challenge, marking a significant evolution in the Metroid series' enemy design.