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In the mirror universe, Valtane was a Terran male who served in the Imperial Starfleet of the Terran Empire during the late 23rd century.
In 2293, he was assigned to the ISS Excelsior. He made regular reports to Captain Tuvok, including updates on the itinerary of Emperor Spock. (VOY - Mirror Universe novella: The Mirror-Scaled Serpent)