The Old Man From Sulfur Creek was a Real Character The three main characters in “To Build a Fire” are the unnamed man, the wolf dog, and the old man from Sulfur Creek. The wolf dog and the old man from Sulfur Creek are important to the story of the unnamed man and his experience. the wolf dog is classified as a main character because he is with the unnamed man throughout the story. The dog is not there as a pet, but almost companion or guide. The narrator speaks a lot about the dog’s instincts and what the is doing. The narrator also tells the reader how the man is interacting with the dog. The old man from Sulfur Creek never appears in the story, but he is an important character because he warned the unnamed man about the dangers of