Sangfroid was an Incursean commander.
In Con of Rath, he tried to stop Ben's delivery of the Tiffin to stop a peace resolution because "the Incurseans love war." However, Rath boarded his ship, single-handedly defeating his soldiers. Sangfroid told Rath he'd let them go, but opened fire the second Rath returned to the ship.
Kevin lured him into a black hole in which Kevin out sped him and the Incursean ship was sucked in. His last words were, "I really hate that guy."
Ben 10: Alien Force
- Con of Rath (first appearance; death)
In French, "sang-froid" means coldblooded. In English, the term is used to refer to calmness under pressure, which Sangfroid exhibited when being threatened by Rath.