Chloé Bourgeois is a student in Miss Bustier's class. She is selfish, overzealous, and spoiled, only showing a little remorse when she needs to. She often abuses her father's status as mayor to do whatever she wants like tormenting Marinette, despite being a fan of her alter-ego, and bossing around her friend Sabrina Raincomprix while claiming her childhood best friend Adrien Agreste as her boyfriend.

Chloé accidentally acquired the Bee Miraculous which transforms her into "Queen Bee". Her weapon is a spinning top and her special power, "Venom", allows her to paralyze any sentient being. Despite publicly revealing her secret identity, Ladybug would occasionally lend her the Miraculous, but is later forced to suspend her from heroics when her public identity becomes too much of a liability. After growing paranoid and resentful of Ladybug for not giving her the Miraculous as she wished, Chloé betrays the heroes to Hawk Moth and exposes other temporary heroes to him, resulting in her being permanently relieved of duty. Afterwards, Chloé descends into villainy, and later allies herself with Lila Rossi out of mutual hatred for both Ladybug and Marinette. Chloé's actions gradually cause her to become hated by most of Paris and eventually cost her both Adrien and Sabrina as friends. When her father steps down as mayor, Chloé becomes Gabriel's puppet ruler through Lila's manipulation by staging a Coup d'état and using her power as acting mayor to brand Ladybug, Cat Noir, and Monarch as outlaws. She later hypocritically accepts Monarch's offer to become secretly akumatized and is given multiple Miraculous powers to enforce her tyrannical rule, culminating in her trapping Ladybug and Cat Noir and attempting to publicly expose their identities. However, the heroes are able to master their powers to stay transformed and rally the citizens of Paris to revolt against her. Ultimately, Chloé is de-akumatized, stripped of her position and all her power, abandoned by her allies, and is exiled to live with her mother in New York as punishment by her father.