A vice-proconsul of the Romulan Senate who defects to the Federation in 2369, smuggled out in stasis aboard the warbird Khazara with the aid of Spock's underground.
M'ret figures in the sixth-season episode Face of the Enemy. He and two of his aides are the cargo that Subcommander N'Vek is trying to deliver, hidden in stasis chambers that the ship's commander is told contain something belonging to the Tal Shiar. He spends almost the whole episode unconscious.
The dissidents hope his escape will open a route by which others can follow. Picard is told that the defection of so senior a figure would be a significant blow to the Romulan government and a boost for the movement Spock is nurturing.
After the planned transfer to a freighter fails, the three are beamed directly to the Enterprise-D during a confrontation between the ships, at the cost of N'Vek's life.