Answer: Although Luchesi never appears in the story, Montresor mentions that he will ask Luchesi to taste the wine instead of Fortunato, if Fortunato is too busy. Montresor mentions Luchesi for the purpose of provoking Fortunato and convincing him to come into the catacombs.
Explanation:
In the Cask of Amontillado, Poe's short story, Montresor informs the readers that he is going to take revenge on Fortunato, who has insulted him.
In order to put his plan into action, Montresor must first lure Fortunato into the catacombs. He invites him to come and taste the wine he has acquired, mentioning that if Fortunato has already made plans for the evening, he will invite his rivalry, Luchesi, to come over and taste it. Fortunato argues that Luchesi is not competent enough for wine tasting, and insists that he should do it. Montresor knew that mentioning his friend's rivalry will make Fortunato jealous and motivate him to come into the catacombs.
