War's a rotten thing, yes... It used to be that monsters and humans could coexist, in fact! But humans grew to fear monsters, who have a unique physiology that allows them to grow powerful if in possession of a human soul. The fear of that possibility... That's all it took for humans to attack.

[Mettaton redirects his attention away from the sun and back to Sheryl with an easygoing smile.]

In the end, we shouldered all of the casualties. A single monster against a human in combat... A monster in that position may as well be planning out where they'd like their dust sprinkled after their demise! We didn't stand a chance.