An “effeminate” man who is portrayed as a wimp and is implied to have had a love affair with Mr. Humphry. Most scholars agree that Fitzgerald probably intended for Campion to be gay; at the time of the novel’s publication, homosexuality was illegal in America and in many parts of Europe, and it was considered an illness, curable through clinical intervention. Rosemary echoes this attitude, as she is quite repulsed by him, considering him very unmanly as they watch the duel between Tommy and McKisco together.