Board Thread:Speculation House/@comment-216.239.28.98-20140422001233/@comment-24901923-20140507224346

Also, regarding Pyrrha's mentioning that Grimm are soulless. If the Grimm have no souls, then it makes sense that no Aura would be discharged to be detected by those who can percieve and use their Auras, because there is nothing there to make an Aura. The Grimm are described as targeting mankind and all of their creations, so it could be that they are trying to kill in order to get at the essence of men, and absorb it in the hopes of somehow acquiring a soul. Or maybe, if they are physically incarnated souls with no vessels, they must feed on souls to stay alive, because there is nothing to protect and contain them. Their physical matrix, when breached, would leak out whatever energy is left, hence, the reason they smoke and possibly dissolve upon death. Mankind may simply be a favorite target because they have souls that are more nourishing to the Grimm in comparison to other life-forms. Grimm would attack mankind's works, because where mankind's creations are, the chances of prey are higher.