In the mirror universe, T'Les was a Vulcan female who lived during the 21st and 22nd centuries. She was the mother of T'Pol. T'Les was a faculty member of the Vulcan Science Academy, and an outspoken proponent of the pacifistic teachings of Surak. Several years prior to 2155, T'Les resigned her position, and disappeared from public life. She was rumored to have joined the rebellion against the Terran Empire on planet Vulcan.