What are some examples of direct and indirect characterization in “the cast of amontillado”

The direct characters in The Cask of Amontillado are Montresor (the first-person narrator) and the ironically-named Fortunato, his inadvertent enemy. No one else appears in the story, but reference is made to several indirect characters.Luchesi is a man known to both Montresor and Fortunato. He has a reputation as a connoisseur of wine and is therefore a rival to Fortunato in this respect. Fortunato contemptuously dismisses his expertise, but this may be mere bravado. Montresor uses repeated references to Luchesi as a form of reverse psychology to lure Fortunato into the vaultMontresor's disobedient servants are also mentioned. We do not know how many there are, but the fact that he has several makes us question his claim to be a ruined man. He has expressly told them to stay in the house and is cynically certain that this is the way to ensure their departureLady Fortunato is mentioned by her unfortunate husband. She will be waiting, in company, at the palazzo.

that is true because that is something they fulfill for their work.