Honestly just killing that muscle brained oaf in charge of the demons right now would probably resolve 90% of the world's problems. He and his masochist minion are the only ones that would never listen to reason.
Is he actually gonna do it this time because it's not really Manako? He's cried wolf with rape scares so many times in this manga, but given that Sasae 2.0 got so angry he turned into a tree, he might. :shamihuh:
I'm starting to think she was some kind of legendary adventurer, maybe even part of the hero's party that beat the demon king. It would explain her demeanor, despite being a wraith.