Too many walls of text, but I go with the "That was slaughter of innocent people" fraction. Jepp, why didn't Noche just teleported that guy out there and took his revenge. (Still murder, but at least without a "mass-" in front of it.)
Milly you freak. I liked you, but what BS is leaving your mouth? You couldn't >soul mate< with your guy, because it would make him grief even more about your death? Demonfolk only bound once, because the other half is so precious? Yeah, but killing innocent humans, not such a big deal. It's their kings fault. See the conflict here? Is live precious or not? Tell the grieving family members, how it's not Noche's fault for blowing up their beloved ones. Or is your lack of empathy, because you never met them? And because you will never meet them. You know, because they are powerless (can't take revenge/can't even sue) and they have so short life spans...Wow. I see a parallel to wars on the news and how I'm not affected either.
It's either that, Milly, or you demonfolk don't think all that high about humans. More like "humans = rats". Some are cute, but we could do without most of them.
Well, I kinda start to wish, that by a freak decision of Gaia, the next Demonlord should be one of the new human orphans, with some cheat abilities. I wanna see how this plays out in a few years.
EDIT: Well, there is one thing that MC could do. She could call Gaia and wish herself back to earth now, as she won't put up with being used as excuse to kill innocent people. And don't worry about Noche. As owner of a nervous system, my own mind and a spectrum of different emotions, like anger, compassion and rationality, I'm qualified to say, "It's that demonlords own fault, that she left him." ?