In the mirror universe, Vic Fontaine was a male Terran. He was surprised to run into Quark and Rom from "our universe" in 2375, becuase the mirror Quark and Rom had died some years ago. He was shot by Julian Bashir on Terok Nor while trying to flee. (DS9 episode: "The Emperor's New Cloak") It is unknown how Vic could exist as a real human in the mirror universe while being a hologram in the regular one. It is possible that the mirror Fontaine (who is only ever called by his last name) is actually the mirror counterpart of Felix, the programmer who created the "regular" Vic.