Admiral Cheviat was in charge of the Rapid Response Fleet. Aboard the Intrepid, he led an attack against the Daleks after Captain Julio Medem's death. Like the rest of the fleet, he was presumably killed. (AUDIO: Invasion of the Daleks)
Behind the scenes[]
As seen in Dalek Empire: The Scripts, Admiral Cheviat was a female in the original script. Nicholas Briggs could not recall why this was changed.