Loli demon princess, nice :thumbsup:
Also, it should be obvious that there would be conditions, that there wouldn't be a magic so convenient to just snap your fingers and send people to another world.
Some nobles in the Empire were planning in sacrificing the Hero to appease the Demons so to not start a war, because "just the hero being there would provoke the demons" or something like that. They view the Hero as a old, dangerous and unneeded concept.
I get the Empire want to rule the world and sheet, but i can't stop thinking that sending Rei to the Oni village to fight her friend was a very stupid gamble.
"A few kinda strong kids joined, so let's forget all tactics, strategies, logistics, preparations, information gathering etc, and just CHARGE AHEAD and leave our fates to children!". Top class military right there :fml: