The mirror universe counterpart of the holographic singer Vic Fontaine, a flesh-and-blood Terran rebel who is shot dead by the mirror Julian Bashir in 2375.
The mirror Vic Fontaine appears briefly in the Deep Space Nine episode The Emperor's New Cloak. In the prime universe Vic is a self-aware hologram of a 1960s Las Vegas lounge singer. Here he is a living man, dressed for combat rather than the stage and fighting among the Terran rebels.
Quark and Rom see him moments after they arrive in the mirror universe, when a firefight breaks out around them. Vic is gunned down by the mirror Bashir before he can say much of anything.
The scene is played as a joke on the brothers' expectations. Rom is left trying to work out why, in a universe where everything is supposed to be reversed, the hologram should turn out to be real.