Death Glare? That's actually her Reasonable Authority Figurehood shining through. Chiffon has observed Satellizer for long enough to know that she doesn't respond well to any attempts to bludgeon her into submission. Instead, Chiffon tries to, y'know, reason with her. "This is a violation of school regulations. Cease and desist, please." The cowering is mostly there to make it clear to Satellizer that Chiffon neither intends nor wishes to fight her. And it works. Satellizer responds much better to people who nicely ask her to stop.
Gengo Aoi is responsible for bringing the Nova into this worldA lot of evidence has come up pointing to the fact that the good man Aoi is not as benevolent as many make him out to be. He came up with all the acceptable proposals for countering the Nova, His family has a unique condition that makes them very effective at dealing with Nova in exchange for eventually turning into Nova themselves and one of his colleges states that he is trying to control human evolution and mentions him trying to bring to bring what may or may not be an Assimilation Plot to fruition known as the transcending consciousness theory to fruition. What better way to kick start all these off than by bringing mankind's greatest enemy the Nova into this world?
All of Freezing is caused by a Stable Time Loop.Apparently it all started when Maria Lancelot appeared before Gengo Aoi at a lake. All Pandora technology was made from her. An earlier arc involved a plan to make clones of Maria. Perhaps in the future, a perfect clone of Maria will be created and, for some reason or another, end up being sent back in time... to meet Gengo at a lake in the past, thereby becoming the original Maria. Pandora technology thus has no origin. And if it turns out that all Novas are actually just mutated Pandoras from the future, the whole plot is the product of a Stable Time Loop and none of it has an origin.
The Baptism Between Satellizer and Kazuya will either bring about or stop The End of the World as We Know It.Satellizer has Kazuha's stigma, and Kazuya is being hinted at as something more than human in some cases. The Baptism has been teased between the two of them for so long, it's impossible for it to not be something extreme either way. Either the Baptism itself will cause some unforeseen catastrophe that threatens to annihilate the world, or it will be pivotal in stopping a world-ending threat that's already in progress.