The mirror-universe counterpart of Admiral Maxwell Forrest, captain of the ISS Enterprise, who is overthrown by his first officer and later dies aboard his ship in Tholian space.
Maximilian Forrest commands the Terran Empire's flagship ISS Enterprise in the first part of In a Mirror Darkly. He rejects Commander Archer's proposal to raid Tholian territory for a captured ship from another universe, and is promptly locked in the brig when Archer mutinies.
Freed by loyal guards with T'Pol's help, Forrest takes his ship back, but by then Starfleet has endorsed the mission and he has to carry it out with Archer at his side.
When Tholian ships spin a web around Enterprise, he orders the crew to the escape pods and stays behind at the helm to give them time. He is killed when the ship is destroyed, leaving Archer in possession of the USS Defiant.