Montresor emerges as an intriguing character whose quest for vengeance moves the narrative forward. Rooted in his family motto, "Nemo me impune lacessit," meaning "no one insults me with impunity," Montresor's actions suggest that his will to exact revenge drives his existence. Poe implies that his noble lineage plays a role in shaping his murderous intent. Despite citing Fortunato's alleged insults and injuries as justification for retribution, Montresor remains vague about the specifics of these, leaving room for speculation about their authenticity. His adeptness at deception is evident in his manipulation of Fortunato, while his meticulous planning is showcased in the elaborate scheme orchestrated within the catacombs. Although momentarily unsettled by Fortunato's screams, Montresor ultimately exhibits a chilling detachment, characterized by his cold, calculated, and unwavering pursuit of vengeance.
Fortunato is a pivotal character, initially introduced through Montresor's narrative detailing perceived injustices. His entry is then marked by his attire akin to that of a jester or fool—motley—thus setting the tone for his role. Fortunato is perceived through Montresor's biased account, fraught with madness and malice, hiding his true nature. Throughout, Fortunato exhibits foolishness and ignorance, disregarding warning signs and worsening his plight. His ego, greed, and competitiveness overshadow his judgment, evident in obtrusive displays of wine connoisseurship juxtaposed with reckless consumption. Despite Montresor's disdain, Fortunato remains oblivious, clinging to the illusion of friendship forged through a shared passion for wine. Only at the story's climax does Fortunato confront betrayal, as Montresor buries him alive within the crypt, revealing his deception.