Board Thread:Speculation House/@comment-203.14.52.144-20150518014116/@comment-24994749-20151028164129

Ok, but this is assuming that people's auras are locked by default and that Grimm's are attracted by aura.

To the 1st my problem is how did the first humans survive long enough to discover how to unlock aura. To the 2nd that animals also have aura, yet it's been stated that Grimms don't target them.