( Lumine is acting strange and it isn't his imagination. Childe frowns a little and wonders why she'd call him Tartaglia, ask him if he's mistaking her for someone else when he fought a duel against her in the Golden House, had her take Teucer around Liyue...why wouldn't she know him? )

No, I don't think I'm mistaken. I know you. You fought me in Liyue. You took my brother around when I was busy with the Fatui. You and I are rivals if not friends. Why wouldn't you know me, Lumine? You've never called me Tartaglia.