Who is Eddie Kaspbrak from It and what is their importance?

Eddie Kaspbrak is a hypochondriac who is married to a woman who is eerily similar to his mother. Eddie is a successful businessman, running a limo company in New York. Eddie has made a good life for himself despite his occasional unhappiness in his marriage. When the call comes from Mike to ask him to return to Derry, Eddie almost decides not to go because of the fear it causes his wife. However, Eddie finds a strength inside himself he did not know he had. He fights his wife and leaves for his hometown. Once on the road, Eddie begins to remember the summer of 1958 and the friends he has somehow forgotten.