Valkris was a Klingon operative in the 23rd century, who was romantically involved with Commander Kruge.
In 2285, Valkris undertook a mission for Kruge to obtain information on the Federation technology known as "the Genesis Device." Hiring a merchant vessel to facilitate her mission, Valkris made contact with Kruge and supplied him with the data. When Kruge learned, however, that Valkris had reviewed the information herself, he destroyed her vessel in order to preserve the secrecy of the mission. Valkris accepted this without complaint and was told by Kruge that she would be remembered with honor.