Spirits: Obviously I mean Discord here. But why is it plural? Well, here's your answer. If Dissy is the Spirit of Chaos and Disharmony, then what's to say that the seven deadly sins don't have forms? Or that the Elements of Harmony don't have forms, outside of their standard stones/bearer symbiosis? Well for me, that possibility is a reality. The Seven each have different names, for obvious reasons of FMBH (Fullmetal Brotherhood) references/crossovers. These wild and deadly Spirits of Sin must do combat with the Spirits of Harmony and the Spirit of Chaos. As such, after the release of the Observers (Humans), these Spirits hitched a ride with them and now have physical representations of themselves.