UltimaFantasy2007
White Mage
Due to the fact that the summons Ifrit, Shiva, Bahamut, Alexander and such are no where to be found in XII, they have taken on the form of airships (forms of transport); and we all know that XIII's summons (most likely seeing the return of Ifrit and co.) are likely to have vehicle forms (Shiva being the only one confirmed to date) it seems that XII acts as a sort of pre-mature concept that paved the way for XIII...?
