User blog comment:Zathronas/Analysis by an author: Part 2 Antagonist, the Darkness/@comment-10380701-20131216235749/@comment-10380701-20131217074350

You should note that in the very same scene before that, Pyrrha said this.

Pyrrha: "With practice, our aura can be our shield. Everyone has it, even animals."

Jaune: "What about monsters?"

Pyrrha: "No. The monsters we fight lack a soul. They are creatures of Grimm, the manifestation of anonymity. They are the darkness, and we are the light." So humans are the embodiment of the Light? It's noted here that animals have Aura too, and most likely, humans are the superior users of Aura, as if they were born to learn how to make use of it.