[...Since when had Kazuya had any powers? Atsuro's eyes flicker back and forth in confusion for a moment before he decides to assume the obvious for now.]

Actually...

[A pause. Atsuro could be intellectual when he needed to be.]

It makes sense. If you've got powers derived from being a demon king, they shouldn't be working here. This world is only connected to ours - yours - because you're here, and you've got that 'Destiny String' thing they never bothered to explain. If your powers come from... Yomi or hell or somewhere, we're pretty darn far away. If your powers come from demons, then you don't have any subjects here.

My demons recognize you as their lord, but our worlds are probably parallel enough that things sort of overlap.