I made a deal with the devil, Jimmy. She dies, I go free. [Jim Raynor: "We all got out choices to make."] Damn Shame...
Who: Tychus Findlay
Source: StarCraft II: Wings of Liberty
Note: After successfully transforming Kerrigan back to her human self, Tychus Findlay contacts Mengsk, who orders him to kill her. Raynor, asks Tychus what he did, Tychus responds. As he says this, Jimmy slowly reaches for his pistol. Tychus almost kills Kerrigan, but Jim Raynor knocks Findlay's rifle out of the path of her head, and quickly kills him.