Who is Robert Masterson from Practical Demonkeeping: A Comedy of Horrors and what is their importance?

Robert Masterson has been staying with The Breeze since his wife, Jenny, threw him out of the house. Robert is a photographer and an alcoholic. Each time he reaches a low point in his life, some miracle seems to save him, and at the beginning of the novel, Robert has reached perhaps the lowest point in his life.