Being dragged here in the middle of that situation would have been nerve-wracking. Not knowing what was happening back home.

[ He does look carefully, catching all the differences between this guy and other creatures Nico knows. ] I've met a lot of Underworld creatures but this is the first time I've seen a demon.

[ Totally unfazed by the fact that this guy's supposed to be bad. ]

Don't know about demons but if humans didn't wise up eventually, they end up punished in the afterlife for eternity.