[ He watches her expression and feels a smidge of sympathy for her. It must be hard to wait for someone who won't return and he's curious why they won't. They must be dead, correct? Would it be gauche to ask her if they're dead? He supposes that can wait until he knows her better. ]

I'm glad you're enjoying yourself here, even as you continue to wait. You have my sympathy.

[ And as the question comes, he looks a dash surprised but then considers it. He supposes it might be best to know what she knows, if Gojo has told her what jujutsu sorcerers are there would be no point in hiding it. But if he hasn't, then that would be unfortunate too and Nanami doesn't want to reveal it if he doesn't have to. So, he splits the difference somewhat. ]

Do you know Gojo Satoru? We work at the same school together, though I am not a teacher. More of a mentor to the students.