@Oculunus
Felix invading the country was not part of the deal, and the damages, deaths or not, can be used to further leverage the demon country into a lower position.
It's the demon country's fault, and therefore the king's fault, that a rogue crossed the border and caused wanton mayhem.
Furthermore, they didn't send any warning or assistance, instead he was cleaned up by a civilian.
That they survived isn't the issue, it's that they were attacked in the first place.
Though, i havent read any of the WN, so i can't really say what's gonna happen