[ As he explains the various aspects it's easy to tell which parts she recognizes - the three-headed dog is definitely something pretty well known around the world even if nothing else is. Not to mention that since mortals consider it to be myth get things wrong.

For the most part Nico doesn't mind answering questions about the Underworld but no. Not that. ]

I'd rather not talk about Tartarus. [ He still has nightmares about it and Nico suspects he's not the only one. ] You could try asking Percy but I doubt he'd want to talk about it either. [ Yeah, it's that bad. Plus it's only been a few months since they managed to get out and are recovering from the experience.

Then she asks him a question not about the Underworld at all. ] I know some about the Romans. Met a few of the gods and goddesses too. And I know others exist but not much more than that.