In the mirror universe, Enrique Muñiz (also known as "Quique") was an active member of the Terran Rebellion against the Klingon-Cardassian Alliance who served on the Defiant under the command of General Miles "Smiley" O'Brien. In 2375, Muñiz was considered by many to be both loyal and faithful to the cause, but O'Brien was forced to investigate him when faced with the task of exposing an Alliance spy in their ranks and Muñiz had began receiving and sending encrypted messages through a loophole in Terok Nor's communications system.