A Klingon envoy who undermines Kirk's mining negotiations on Capella IV and backs the coup against the Teer in Friday's Child.
Kras is a Klingon sent to Capella IV in Friday's Child to win the mining rights to its topaline before the Federation can. He encourages Maab to overthrow the Teer Akaar, hoping that a friendly ruler will give the Klingons the treaty.
As Kirk's party flees with Eleen, Kras proves treacherous even to his Capellan allies, which costs him Maab's support. He dies in the confrontation that follows. He was played by Tige Andrews.