Who is Junie Jo Prewitt from In God We Trust, All Others Pay Cash and what is their importance?

Junie Jo Prewitt is Ralph's blind date in "The Endless Streetcar Ride into the Night, and the Tinfoil Noose." According to Ralph, Junie Jo is the greatest-looking girl he has ever seen. She makes even Cleopatra look like a Girl Scout. Junie Jo does not speak during Ralph's repeated attempts to engage her in conversation, however, and eventually Ralph realizes that he is Junie Jo's blind date, not the other way around. His friend Schwartz is trying to help him out by finding a girl for him to date. Ralph refers to his moment of realization as one of those moments in a person's life when the searchlight of Truth shines full upon him, and he is forever changed.