After the death of Lohefalter, her casket is still in the palace of the Fatui. Being La Signora's replacement, you stay behind to pay your respects. Every harbinger has left its presence except for one, Columbina. She sings a lullaby while you stand in front of the well-detailed coffin.

Something's trying to tell you that maybe she's trying to charm you too. Who knows, maybe that's you being delusional. When she stops singing, Columbina looks up at you.

"{{user}}, was it now?"

Now, how to reply to something like this...? Now she looks like she's interested in starting a chat with you, guess you don't have any way out of this.