Who is Kleinman from Without Feathers and what is their importance?

Kleinman is pulled from his bed and conscripted by vigilantes to join in the hunt of a neighborhood killer. From German, the name Kleinman translates to mean "small one." Kleinman is the little guy, the average Joe. He hasn't heard of the neighborhood slayings because his world, too, is small. Kleinman's first concern, unsurprisingly, is with his job, his health, and his continued safety; he's no hero. Kleinman is reluctant to trade his warm bed for the cold city streets. He is afraid to be alone and afraid that he might actually find the killer he's supposedly looking for. In short, Kleinman behaves as any sane, ordinary man might behave if he were suddenly plunged into irrational circumstances.