Harvey (The Book of the War)

During the Mount Usu duel, "the Voice", a manifestation of the enemy, cited "the Scourge. Harvey. Hermes. The bargain of the mask" to Michael Brookhaven in illustration of the principle that "the coolest character is the one whose face you never get to see", echoing Brookhaven's statement that the coolest character always won, and thus implying that their own victory in the War was inevitable. (PROSE: )

Behind the scenes
In the influential 1944 play , the titular character is a probably-illusory six-foot-tall, anthropomorphic rabbit, whom the main human character considers his best friend, but whom nothing else, including the audience, can see.