Final answer:
The main characters in Poe's 'The Cask of Amontillado' are Montresor and Fortunato, with Luchesi mentioned but not directly involved.
Step-by-step explanation:
The main characters from 'The Cask of Amontillado' are Montresor and Fortunato. These are the two central figures in Edgar Allan Poe's dark tale of revenge. Montresor, the narrator, lures Fortunato into the catacombs under the guise of verifying the authenticity of a cask of Amontillado. Fortunato, a connoisseur of wine, falls prey to this ruse, ultimately meeting a grim fate at the hands of Montresor. Luchesi is another character mentioned in the narrative; however, he does not make an actual appearance. He is used as a device by Montresor to provoke Fortunato's pride in his wine tasting abilities.