User blog comment:Dragon´s Blade/World Coexistence Alliance/@comment-24965182-20140927154021/@comment-98.211.214.12-20140927171716

Rodney: Well, having the Arcanas means that you give Personas from the same Arcana a power boost when fused. You can have other Personas while not having the Arcana, but they won't get the boost from fusions. Say you fuse Personas and you get one from the Magician, you don't have the Arcana, but you can still have the Persona. Just that it won't get a boost when fused.