The robot enemies that chase Samus in Metroid Dread are the E.M.M.I. (Extraplanetary Multiform Mobile Identifiers).
The Galactic Federation sends seven E.M.M.I. units to the planet ZDR after receiving evidence that X parasites may still exist. The robots lose contact with the Federation and are later reprogrammed, turning them into relentless hunters of Samus.
E.M.M.I. patrol designated E.M.M.I. Zones, where Samus must hide, reduce noise, and use the Phantom Cloak to avoid detection. They are nearly invulnerable to her ordinary weapons. After defeating a Central Unit, Samus temporarily gains the Omega Blaster, the only weapon capable of destroying an E.M.M.I. unit.
A common mix-up is confusing them with X parasites, which are biological enemies rather than robots. The E.M.M.I. concept also echoes the stalking tension created by the SA-X in Metroid Fusion. Each destroyed unit grants Samus a permanent ability, such as the Morph Ball or Space Jump.