After, he stays in his room.

Probably, he's safe, so long as no one gives his location away. He has no contract to sense, and Hatter has told him he smells and tastes a bit different than the other Breaks. And it...slows down, quickly, after the initial attacks. But he stays in his room all the same for a few days, just in case, because it won't do anyone a lick of good if he winds up slaughtered with the rest of them.

Being, perhaps, a bit more mature, a bit more emotionally capable than his counterparts, he doesn't run off to rain doom and pain upon whoever is responsible for this. But that doesn't stop him from thinking about it. Thinking about it and thinking about it and thinking about it.

Somehow, whether it's because of him or because of their allies or because of a whole swarm of angry restored Breaks in about a week's time, someone is going to pay.