Adrien Agreste: Is Marinette's classmate and a popular fashion model for his father's clothing company. He transforms into the superhero "Cat Noir" (French: Chat Noir, "black cat") with the help of his Kwami, Plagg, to assist Ladybug in saving Paris. Adrien is kind and well-liked, and hangs out often with his best friend Nino. Though his family is wealthy, he laments his poor relationship with his stern father, Gabriel; his mother, meanwhile, has disappeared.

He is in love with Ladybug, despite not knowing her true identity, and tries to impress her, although he makes bad jokes and cat-themed puns as Cat Noir, which frequently annoy her. His special ability, Cataclysm, allows him to destroy an object that he touches with a swipe of his paw.