[Every station world has a World Barrier.]
[Since a station is a small world, then some of them should be the size of a world. Yet, some stations only have the explorable size of a city or town.]
[For example, at Crimson Rain City, some clues spoke of the existence of Bloodsucker Royals, yet that city merely had a dozen Bloodsucker Nobles.]
[In other words, it's not that the world of Crimson Rain didn't have Bloodsucker Royals, but that the station only restricted your exploration to that specific city.]
[The same occurred to the Red Riding Hood Station. When one of your avatars was about to leave the forest and enter the mountain range, an invisible barrier blocked you.]
[You had already tested, and so far, you couldn't damage the world barrier.]
['There should be an item that can allow passing through the world barrier. Maybe it's a later game item, and since Terra's batch of Train Conductors are still in the early game, there aren't any clues of that yet.']
