Who is Joe Williams in the novel, U.S.A?

Joe Williams is a wandering seaman who can't keep a job and who always seems to be on the outs with authorities. He is emotionally flat and limited, not educated, not imaginative, and doesn't think about his life much. He loves his sister Janey, but they are separated by her ambition and her growing embarrassment at his uneducated, low-class speech and behavior and by his lack of desire to better himself.