When I found out about the origins of the Fortellers names, I found it very intriguing that they were named after the Seven Deadly Sins. However, upon research in Wikipedia and comparing the Fortellers to Organization XIII, I came to the conclusion that the names that the Fortellers are currently known by was passed down by the Master of Masters. In layman terms, it's not their real names, rather, I believe that the Foreteller's real names are based of the Seven Heavenly Virtues.
Ava = Caritas (Carita)
Aced = Industraia (Ustra)
Invi = Humanitas (Manita)
Gula = Temperantia (Empera)
Ira = Patientia (Entia)
Ava = Caritas (Carita)
Aced = Industraia (Ustra)
Invi = Humanitas (Manita)
Gula = Temperantia (Empera)
Ira = Patientia (Entia)