[ If Nico's going the sensing people, it means he'll need to make connections - friends even so if one of them disappears he'll be able to sense it. Like he did when Leo died or when he could feel where Percy was on his journey through Tartarus. ]

They go home to the exact moment they left or have they've been considered missing by others?

[ It's kind of an important question because things were happening back home even if Nico isn't directly involved at the minute. ]

Seems like the kind thing to say, to let them think of the best possibility for people who disappear.

[ Would Nico tell everyone if he finds out the people who vanish in the forest die? Who knows. ]

Sort of seems like it sometimes. I've survived a lot of terrible things but the people around me don't always.