She is voiced by Ariana Grande.
Sapphire wore a floor-length gown with white, rounded, puffy sleeves, a navy blue top, navy blue gloves, and a light blue pinafore.
She has one eye, light blue hair with blue streaks, and blue skin.
Sapphire is a kind-hearted, calm, clever, and patient Reduxor Gem. She uses her future vision to help solve problems.