- “In the daytime I’m Marinette, just a normal girl with a normal life. But there’s something about me that no one knows yet, because I have a secret...”
- ―Marinette's introduction
Marinette Dupain-Cheng is the protagonist of Miraculous Ladybug. She lives a double identity as the clumsy, goofy, and cheerful student attending school, then transforms into the graceful and serious superhero, Ladybug, when danger is afoot.
Marinette lives with her Chinese mother and French father in their Paris bakery, and has a love for creating her own fashion. She has an obsessive crush over her classmate Adrien, but can never find herself to bring up the courage to talk to him. She transforms into Ladybug using the miraculous in her earrings and the power of her kwami, Tikki; Ladybug is everything that Marinette is normally not: graceful, confident, and serious. Her weapon is a yo-yo that has the power of providing her with a "lucky charm" or a seemingly random lady-bug patterned item that will eventually come in handy in the situation she finds herself in. Ladybug often finds herself in awkward situations with her partner, Cat Noir, because he is open about her feelings towards her and wishes to be with her, but she sometimes finds him rather annoying and overall, is not interested in him.
- In France, ladybugs are known as symbols of good luck.