Who is Harry from Tales of Ordinary Madness and what is their importance?

In the story, Reunion, Harry has just gotten out of an alcohol rehabilitation program and returns home to his girlfriend, Madge. He has no intention of sticking to an alcohol-free lifestyle, and he immediately buys more beer. Harry is verbally and physically abusive to Madge, but nevertheless, he values the sense of sanctuary that she brings to him when they are under the same roof.