Olive has the ability to turn into a cat, then human, being a cat girl. Formerly working under the Triumvirate, she was initially tasked with observing the High Guardian Academy. When Rosemary and the other girls become close to figuring out some of their secrets, she is instead tasked with eliminating them. She's slightly sassy, though she's okay at combat, able to use magic but accidentally once used a staff as a sword. Being half cat, she's also quite good at acrobats and gymnastics.