Merryweather is depicted as a stereotype of a classical music afficionado. When he is host of Double Clef FM, he often intersperses the pieces he plays with references to his refined lifestyle. However, he frequently displays his poor cultural knowledge. For instance, he likens one piece of music to "Fellini's Lolita." "Lolita" was written by Vladimir Nabokov and twice made into film adaptations, though neither was produced by Federico Fellini. Furthermore, Merryweather mentions that he once spent a summer "reading Proust in the original Italian", even though Marcel Proust wrote in French.
In 1998, the setting of Grand Theft Auto: Liberty City Stories, he phones into Double Clef FM to complain about the program's present quality and host Sergio Boccino. One of Merryweather's complaints is that Boccino plays too much music by Italian composers, even though Merryweather plays the same amount of music by Italian composers when he is the station's DJ.
He is voiced by Gerry Cosgrove in all of his appearances.