Bug girl is best girl. Also, to quote my wife: "Well looks like she don't need CPR."
I'll also join the "Komachi can see premonitory corpses" camp. And her prescribing to the idea that the predictions should come true would explain some things. Like why her survival may have been a bad thing and trying to "help" Satsuki fall to her death. (Maybe people that can see premonitory corposes can't see their own?)
She should have been decapitated in chapter 1 and tampering with that broke something in the death mechanism.
I really hope the story doesn't go the Final Destination type of "fate is real and actively conspires to kill people" plot device. That just undermines the entire point of stories about predictive superpowers, since what's the point of watching a character struggle to make the world better if there's some kind of omniscient entity ensuring that their successes are just drawn out failures in disguise?
That and I have a distinct distaste for the concepts of fate and destiny. The idea that certain people are just meant to be in certain positions is an excuse for entirely too much apathy in society.