More plot, this chapter revealed why Kefeid is so dead set on stopping the Demon Lord.
He's the "Hero of the North" that failed to stop the Demon Lord ten years ago.
The comments on page 3 seem to imply he's entire kingdom was wiped out in that war. They also solidified the fact that the Demon Lord is genuinely evil and the monsters clearly don't support him. So, a team up might happen in the future.