Aria and Ayata

Why wouldn't she learn what her ancestor created?

Ayata learned to manipulate earth from the Light Elf, and spoke using her body language. Eventually she created an art of her movements, a martial art.

Aria learns to manipulate chi, and because of her lineage, mainly because of her ancestor Ayata, Aria learns martial arts easily. Its a hidden ability in her family that she awakens due to circumstance.