Nixon, a delicately skilled stage performer, plays each character as a slightly exaggerated persona, like roles an artist might try on to demonstrate that identity is a kind of drag. If there are psychoanalytic underpinnings to this approach, they’re not compellingly explored. The result is two actors operating in uneven registers throughout, with Trensch as the so-called straight man to Nixon’s shuffle of mild caricatures. (The exceptions are mother-son confrontations that Elliott pitches as earplug-worthy shouting matches.)