This character is controversial. Author tries (and successfully did) to show us a man who was so deep lonely that becomes even cruel in this loneliness. We don’t know much about his childhood, just that he was there alone too. Also, later he was captured by Billy. When the war comes, he was even happy as he didn’t want to be alone anymore. He sees the war as an adventure. After the war he appears as dumb, fat, and cruel, he dies of gangrene and blames Billy about it.
Roland Weary in the Essays