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After walking around everywhere and even discovering a new area of the Luminous Kingdom we never knew it even existed, we found our little skeleton merchant friend.
I remember meeting him a while ago when the event just started, he had showed up in my territory and I was a bit doubtful of him and who he was, but he ended being a trustworthy person.
Turns out that, aside from the Undead the Demon King of Death directly controls, there's a whole other population of Undead people in the Underworld.
These people call the Underworld "Netherworld" actually, and even have villages and even nations of their own, although I'm not sure how they work.
Undead, unlike living beings, don't require food, water, going to the bathroom, and perhaps not even sleeping that much, so they're very different.
Our society and lives are shaped by our necessities, where we live, what we need to eat, what we must do to get to those living necessities, and so on.