Talk:Mei Misaki/@comment-25958024-20150115204740/@comment-397235-20150118175150

But Takako went specifically out of her way not to kill Kouichi. It was only after Mei apparently killed her and Kouichi was still protecting her that Izumi was willing to do the same.

The only two sociopaths I can really think of are Tomohiko and Keiko, since they were willing to kill everyone without any remorse (and what's especially disturbing about Tomohiko is he justifies himself to his victims each time). I suppose Chibiki technically falls under this as well, in that he only cares about himself, but I think it's mostly those two.