[He quirks an eyebrow, the smile on his face growing ever so slightly. It's not often Heizou meets someone as perceptive as himself, and he relishes in the chance to match wits with this new friend. If nothing else they'll get to enjoy a fun little dance together! There doesn't seem to be a point in denying he's from Teyvat, so he just laughs airily at being sniffed out so quickly.]

Venti, hm? An apt name for someone from Mondstadt! Though I can't say I've ever had the pleasure of visiting your city~

[Still, he tilts his head and claps softly at the sight of the brooch being completed.] It matches you perfectly! You wear fine things well for a wandering bard~