Vulcan Starfleet Officer who plotted with others to assassinate Klingon Chancellor Gorkon in 2293. Lt. Valeris had been the first Vulcan to graduate at the head of her Starfleet Academy class, and had been mentored by Spock. Her involvement in the plot stemmed from a resistance to the changes peace between the Federation and the Klingons would bring. She was arrested at the Khitomer Peace Conference and later charged.