When the wall is almost finished, Montresor shows a moment of concern for Fortunato, when the prisoner does not answer to the call of his name. Montresor throws the torch over the wall. Is he having second thoughts? Has he learned something from this conflict? At this moment Montresor seems to venture near the line of becoming a dynamic character, but then he returns to his wall-building and exacts his revenge, staying firmly in the realm of being a static character. As for being round or flat, we learn very little about either character, though a bit more about Fortunato. He is seen as a Carnival reveler, but we also learn that he is a wine afficionado and seems to have Montresor's respect in that regard. So, we do learn a little about who he is outside of what is happening to him in the story. As for Montresor's character, it seems as flat as can be: he is a person relaying the story of an incident that happened to him many years ago - as if it were yesterday. His character seems very flat.