Sarah is Aria's private tutor and the only daughter of Viscount Loren. She is kindhearted and an expert at embroidery. Sarah is one of Aria's closest friends and allies. Though Aria initially only gets close to her because she knows from her first life that she gets married to Marquis Vincent, a powerful figure in the aristocratic party, she ends up truly caring for Sarah as well.

Spoiler

She later becomes the principal and etiquette teacher at the Imperial Academy for Commoners. After Aria marries Prince Asterope, Sarah also becomes known as "the Crown Princess's Best Friend."