[Even if there's an inherent degree of wrongness wrapped up in being plucked from their worlds and expected to save this one, Shinji can't really help but think there are people here who are probably happier than they'd be back where they came from. He can't speak for the world Zenitsu's familiar with, but this one has a degree of... kindness to it that's absent from his own.]

Hmm, I wonder if it wouldn't be so bad for her, since her brother and friend would be here, too. [All he can really do is speculate - considering he doesn't know Nezuko at all outside of what he's been told.] Maybe you'll get to tell her about it eventually, though.