Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-26206856-20150330041917

Aura is the power used for semblance, and semblance is unique to individuals, yes. However, aura is only found in living things with souls (aka not Grimm) and semblance is a focus of that aura. Pyrrah confirms it herself in The Emerald Forest when she says: "Aura is the manifestation of our soul."

In fact, she mentions grimm are the manifestation of anonymity; representing darkness, with aura representing light, and that everyone has some of both. It takes an understanding of both to manifest the aura in the first place. The fact that everyone has two sides leans in favor of Raven being an alter ego to Yang, but I think it's more along the lines of understanding both your own unique talents and the similarities between others. You're essentially guarding/protecting your uniqueness from the status quo. It may even correlate as the more outgoing and unique the individual, the more aura they have, and the more withdrawn, blend into the crowd types have less to work with.

Actually, considering grimm represent what the war was about and trying to achieve; lack of indivdualism... I wonder if that makes them the supporters of the war, or if someone was trying to turn more people into grimm for some reason. Maybe it was an idea that grimm wouldn't attack if they became more like them... I guess you could also take this as just Pyrrah's own personal view of them rather than a worldwide view. Anyway, that's getting off topic.