Nadia was actually a bit dull, which had to do with the environment in which she grew up.
She was a commoner, and Zimmerman noticed her astonishing talent and spent money to purchase Nadia and take her back to the Wise Mountain to raise and educate her.
From that moment on, Nadia's life trajectory changed completely.
Aside from eating and sleeping, her time was spent meditating and practicing magic, surrounded by twelve Sages; she had no friends, no playmates her own age, and the only books she came into contact with were Magic Notebooks.
Love, marriage—what could that bunch of old messes possibly teach her about such things?
She didn't understand, nor had she ever considered these matters.