User blog comment:StarlightAT/BLAKE'S BOW TWITCHED!!!/@comment-960184-20130906023222

I still think it's a bow. You can see the folds/curves/whatever that make it ... bow-like? 8D /shotforfailwording.

I suppose the twitching of her bow could be:

i) for comedic/cuteness effect. I've seem some animes where they had a character with a bow (or the like) twitch or lift up like cat ears.

ii) an animation glitch. But it seems unlikely

iii) Blake owns those mechanical cat ears they sell in Japan that mimic your brainwaves!!! :D: http://www.catsparella.com/2011/05/fake-cat-ears-look-cute-react-to-human.html