Sabrina is meek, mousy, and very loyal to Chloé. She is always trying to impress Chloé and get on her good side by helping her. Despite being constantly bossed around and bullied by Chloé, Sabrina can be surprisingly unpleasant and be conniving herself, as shown by stealing Marinette's bowler hat design for Chloé in "Mr. Pigeon" and eagerly helping Chloé get Alya suspended in "Lady Wifi". She feels very guilty if she makes a mistake, and she has a warped sense of how friendship works, believing that she must submit herself to helping a friend, like doing their homework. Outside of Chloé's presence and assistance, Sabrina is nice and grateful for anyone's geniality, compassion, and generosity.

As Vanisher, she is malicious, confident, and vengeful. She messes with Chloé and humiliates her in any way possible.