Many characters go by nicknames, introduce themselves to certain characters with an alias, or earn nicknames over time. Would there be any interest in being able to set an alias for other players to represent how your character knows them currently?
An example being a character doing a job introduces themself as "Mr. Pink" so all players involved in the job set the alias. For all intents and purposes the other players interact with a "Mr. Pink" until a situation arises IC that justifies removing or changing the alias.