[ It may only be Zack's impression, having interacted with similar types in the past, but Geralt strikes him as the sort of person who might seem uninterested or uncaring, while oftentimes being the exact opposite. It's clear that he and Jaskier are close friends, so it's reasonable to assume that he helped with the sudden changes.

And maybe in other ways? That definitely isn't Zack's business, though.

Jaskier's certainly willing to share, though not about him and Geralt. Zack's eyebrows both jerk up at that wink and the implication. ]

I've heard a little about them and their legendary parties. Sounds like a real good time.

[ A beat, and he adds: ]

Maybe you could teach me a little about them, then! Do all Aeternae have wings?