l still belive in this show, altough l only care for Misao, the rest can go to hell, but l think that if he only made a pact with Kanade they wouldn't need Kurogane much at all, only in a fucking big major battle with a final boss at the end of the show.
as for Tomo talking or not talking, he has his troubled look when he talks about Kurogane and stuff, and keeps up the face in front of Misao, tough if she knew the truth l doub't that would stop her, as much as l think she belives she is simply a ghost haunting Tomo, she is in fact an apparition attatched to him by some means and Kurogame is not the reason for that, more will be revealed about them sooner or later but l preffer they started doing something about Misou sooner than later, cuz the longer they wait, the bigger the chance that the next use of kurogane wil lswallow her up.