A Klingon agent who obtains data on the Genesis Device for Kruge, then is killed by him to keep the secret in Star Trek III.
Valkris is a Klingon operative in Star Trek III: The Search for Spock. Working for Commander Kruge, she obtains information about the Genesis Device from a Federation source and meets him in a freighter to deliver it.
Because she has seen the data herself, Kruge destroys her ship to keep the secret, accepting the order calmly as part of her duty. The data convinces Kruge that Genesis is a weapon and leads him to the Genesis planet. She was played by Cathie Shirriff.