I've been thinking about this...somehow, I can't help but feel that it would be kind of weird if the Chief of Heaven only created Mikhail and Raphael, and left it at that. Could there be other angels apart from Mikhail and Raphael? If so, are they aware of what's going on with the Shadow Man and everything? If yes to both, do they even care?
91 chapters in and there are still so many questions left unanswered >.<