I couldn't figure out what to do with her coloring originally, although Corundum was always my thought for her gemstone. Since it's the basis for ruby and all other sapphires IRL, but otherwise colorless, I decided to make her coloration include all the colors, but pale (leaving her ears and horn white) and then make her gemstone the full colors of what corundum can become.

Soft, gentle, and shy, but deeply ruthless if pushed. Despite her gentleness, she won't hesitate to kill if she finds it necessary.