Board Thread:Speculation House/@comment-96.236.119.41-20161215012520/@comment-4010415-20161215232353

I've also noticed that, when they accidentally activate their Semblance, their Semblance seems to target whatever is upsetting them. I mention that because, at first, I was like "That would suck if a battle with Grimm turned bad, you freaked out, and then you lost control of your Semblance" and then it dawned on me that, if your Semblance activates itself and targets what's upsetting you (in this case, Grimm), then that could actually just be an evolutionary defense mechanism.

The Grimm are attracted to negative emotion, high amounts of negative emotion can make it hard to concentrate and fight back (especially if it's fear or sadness), high amounts of negative emotion can cause accidental Semblance activation.