Mirror Universe
(coexisting on another dimensional plane)

Terev was a Tellarite serving in the operations division of Starfleet aboard the Terran Empire battle cruiser ISS Enterprise in 2155.

He was the test subject for a demonstration of the new agony booth by Major Malcolm Reed and Doctor Phlox. Reed was uncertain of the nature of Terev's transgression, believing he was late for a duty shift, but noted that "all Tellarites are guilty of something." (ENT: "In a Mirror, Darkly")

Terev was portrayed by regular background actor Pablo Soriano who received no credit for this appearance.
Terev is most definitely deceased now, but how is uncertain. He may have been killed when Enterprise was destroyed, or when the USS Defiant destroyed the ISS Avenger (aboard which Captain Jonathan Archer had all non-Terrans confined).
It is also unknown if Terev had a counterpart in the prime universe. Soriano also played Tellarites in "Borderland", "Babel One", "Demons", and "Terra Prime", anyone of which could've been Terev's counterpart.
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