Today's "Villain of the Day" is VALKRIS!!
Valkris is the 2nd FEMALE Klingon ever to be shown in the Star Trek Mythos, making her brief appearance in Star Trek III: The Search For Spock. A Klingon deep cover agent who obtained Project Genesis data and turned it over to Commander Kruge (played by Christopher Lloyd!) at a rendezvous point in space. Unfortunately, Valkris viewed the Project Genesis Data and Kruge, who was also her mate & lover, was forced to kill her.
Valkris: You may find it useful.
Kruge: Then...you have seen it?
Valkris: I have , my lord
(Why didn't he just beam her onboard? She's a Klingon Fox!)
Valkris had been chosen by her family to lead the house after her older brother Kiosan had damaged the line's reputation. Her honorable death was the capstone in her quest to restore her family name to respectability.
Also, I always thought she would have made a terrific EVIL-LYN in a He-Man movie.