Board Thread:General Discussion/@comment-39492511-20190807174432/@comment-1292715-20190817050638

To answer your earlier question @WJP this is taken from the Volume 1, Emerald Forest.

Pyrrha: Aura is the manifestation of our soul. It bears our burdens and shields our hearts. Have you ever felt you were being watched without knowing that someone was there?

Jaune: Uh... yeah.

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.

Yeah this is basically what she's implying, that the Grimm lack aura because they lack a soul. Which raises the question on how can anything generate an aura without a soul? While we may not know yet how Penny is capable of generating aura, it is still reasonable to believe she has a soul.

And look, cut the believers some slack, not everyone is a critical thinker.