Ermac is a red-clad ninja from the Mortal Kombat video games. In the games, he is a construct made from the fused souls of a thousand fallen warriors and possesses telekinetic powers. In Mortal Kombat: Annihilation, he displays no such powers and his character history is never revealed. He is portrayed by John Medlen in the film.
Ermac serves as one of Shao Kahn's generals assigned to hunting down and exterminating the denizens of Earthrealm. During the final battle of the film, he fights against Sonya Blade and almost defeats her after creating a shadowy duplicate of himself, forcing her to fight two enemies at once. However, Jax comes to Sonya's rescue and defeats the shadow, allowing Sonya to kill Ermac by breaking his neck.