In the mirror universe, T'Prynn was a Vulcan Imperial Starfleet officer who lived during the 23rd century. By 2277, T'Prynn had joined Admiral Spock's cadre of loyal officers and was responsible for carrying out multiple missions for him. In that year, Spock sent her on what she said would be her final mission. T'Prynn was ordered to contact Captain Zhao Sheng and ask him to rebel against Commodore Diego Reyes. T'Prynn accomplished this by booking passage on the Eighth Happiness and setting the ship up to get intercepted by Zhao's ship, the ISS Endeavour.