Grammy Norma, despite her age, is vibrant, silly, and maybe a little crazy. She has a trickster side to her, and is very athletic as she was shown to snow boarding in the movie. Grammy Norma is also brave and unafraid to speak her mind against people of power like Mr. O'Hare.
A common theory by fans is that she has some sort of unseen past with the Once-Ler.
- One theory is that Grammy Norma was the little girl who threw the Tomato at him.
- Another theory is that Grammy Norma was the nerdy girl who the Once-ler threw the Thneed at her.