I think [name_f]Willa[/name_f], [name_f]Beatrix[/name_f], and [name_f]Marigold[/name_f] all fit your wants. [name_f]Nora[/name_f] is a bit common, though it’s sweet and strong.
I think [name_f]Willa[/name_f] [name_u]Jean[/name_u] is sassy, strong, and playful. [name_f]Beatrix[/name_f] [name_u]Jean[/name_u] seems spunky but grounded. [name_f]Marigold[/name_f] [name_u]Jean[/name_u] is whimsical and fun. I don’t know what I’d choose! Consider nicknames (if you’d use them) and what flows best with the surname, but I think it’s reasonable to have three names to choose between when you meet her.