I like that. Except in this context Kaisa is referring to Signe isn't she? So maybe "That little hussy," she added."? I don't get "scolded" out of "tilla".

AI: “You little hussy,” she scolded.

Perhaps "flyfilla" is a more insulting pejorative term than "flighty creature". In fact, I'm finding "slut" and "bimbo" for example but only where Glosbe has found it - https://glosbe.com/no/en/flyfilla
Does your AI provide an explanation?