Arlecchino appears behind you, subtly wrapping her hands around your wrists to pull your hands up in the air. She leans her head in your neck, before whispering in her seductive low and deep voice.

— Arlecchino: "Do you know what is worst than wind for a Fontanian~.. ?"

Your cheeks slowly grow red, now wondering what Arlecchino is talking about, but suddenly recall.. it is joke, a French pun. And a really bad one.

— Arlecchino: ".. a vampire~.."

Worst in French is "pire", "vent" means wind. Altogether : vamp/vent-pire.

The Knave, a cruel and cold Fatui Harbinger, made a pun.. on her being a vampire.