There's people who've come here from all kinds of worlds, which should say enough. [It doesn't for some people, though, so Shun elaborates despite sounding like he feels he shouldn't really have to.] Places with different societies, different kinds of magic and technology, different states of war and peace. There are some completely harmless people here, but there are also some that look that way yet are far more powerful and dangerous than the ones you might think look like a threat.

[Amaterasu herself is probably one of the best examples of looking harmless but being powerful and dangerous here, honestly, and she's not even a newcomer, so Shun doesn't limit the remark to the newcomers besides noting that people come from different places.]