Ah, is it similar to being spirited away? The elders back home would warn the children not to wander too far, or else they may be taken by a spirit of the forest.

[Well, even if they said the worlds are destroyed and all, Hiiro is completely unaware of the concept of multiple worlds. Comes from being so sheltered they didn't even have televisions or phones. Sure, this place looks weird, but the idea that it is still a different world is hard to picture.]

Oh, but... what is a dryad? Or a bioroid?