What? Peace is not an option you say? The Hero and the Demon Lord MUST fight each other because of their constitution?
Someone. Bring a Chess set. Let the sisters duke it out over chess. Problem solved. Rather than the King (who is probably more ignorant about the already peaceful situation...
DAGA KOTOWARU!
@xp32 Either because they are lazy/ their art is terrible or because they think its funny. Like kind of people that make those... giant half naked purple/green fat blobs with horns + derp face in online games.