Keirsey

Keirsey is a Captain in 506th PIR, and when we first see him in Bastogne, he is looking over the map with Hillen and Mike Foley. Every few seconds, he takes a sip from his water canteen. He does not die, but if you shoot him, his name will turn red. Keirsey, nor Hillen is mentioned during the game, but one of them must have died, because we see Captain Tanker at the end of the next mission.