Before that worked, Kidou couldn't say. But now that his hunch is confirmed, all he does is smirk in the dark satisfaction of being right.

It wasn't the right color.

It'd be convenient if Kidou could simply hit the kicked rat, but convenience is not part of this fight. He can manage to pick off a few others in that cluster, carefully picking his targets and trying to push down the frustration of having to leave the rest alive and capable of causing harm. Not yet. He has to be patient.

But someone else can get a few more.

That rat you just kicked, the one getting to its feet on its left - try attacking those!