McWatt

McWatt was the pilot in the 256th squadron of the Army Air Forces during World War II. He was one of Yossarian's closest friends and Nately's roommate. He committed suicide by crashing his plane into a mountain after he accidentally killed Kid Sampson with his plane propeller.

Personality
He was a young man who appears to be very calm and serene and whom Yossarian considers to be crazy because he remains sane during the war. He enjoys flying his plane low to scare Yossarian, which eventually leads Yossarian choking him and threatening to murder him during one of their combat training sessions. After this, McWatt seems to realize that Yossarian might actually be going insane. However, he conceals his increasing panic and madness, which eventually erupts after he accidentally kills Kid Sampson by slicing him in half with a plane propeller, driving him to commit suicide by stalling and crashing his plane into a mountain.