Man I am worried Shuichi will do something drastic. Now that he thinks he actually killed someone, he might not be able to resist going after Mikoto, the one he's been fixated on!
And Mikoto herself, poor thing. She has such low self esteem and no real sense of self. If you're into psychoanalytic theory, it would make sense that a fetish for her own death could develop.
I'm still curious about the neighbor/roomate guy and that shrine. From the brief flashbacks we know he's responsible for warping Makoto's world view, but not much else. What is going on there??