Talk:Mami Asakura/@comment-28355470-20160504192216/@comment-397235-20160509150023

I'm not sure. I figure they guessed about Misaki's little brother being the second Extra, but that's only by process of elimination. I don't know how they could have known who the Extra was for her year, though. Unless, I guess, she was killed by the Calamity and someone happened to see it and realize no one else remembered her.