Funny, just a few weeks ago I read a comment elsewhere about how Frieren's worldbuilding is unrealistic. Like its JRPG ancestor Dragon Quest 3, there's no obvious source of food to support the walled cities of the Northern Countries. Feeding all the people in Äußerst or Eiseberg would need miles and miles of surrounding farms, not forests. I didn't mind that on an NES, because a world map at its scale wouldn't show farms anyway. It's more of an issue in a manga.