User blog comment:PerhapsTheOtherOne/All About That Stuff People & Animals Apparently Have/@comment-3146930-20140809144345/@comment-24994749-20140809164101

Given Pyrrha described aura as the manifestation of a persons soul, it would help prevent, say, Ironwood attempting to dismantle Penny if she continues ti disobey orders.

I do wonder, can animals or plants project some sort of aura? I mean, just like animals in our world developed poison, harder skin, camouflage, etc... could aura have been the result of evolution to protect the people, animals and plants from grimm?