I can't decide who's evil here.
The King, who imports human weapons of mass destruction, or the church, who kills innocent kids.
But it's obviously on purpose.
Most probably, the church is lying for its own purposes (ie, they want to keep that power and not let the secular world have it), Menou is manipulated (if not an otherworlder as well) and Momo is probably tasked into monitoring her and kill her in case she goes "astray".
As for Akari, I smell a Yandere with an ugly backstory.