Marinette Dupain-Cheng is one of the two titular main protagonists (alongside Adrien Agreste) of Miraculous: Tales of Ladybug & Cat Noir.
With the Ladybug Miraculous, when inhabited by Tikki, Marinette transforms into the superheroine Ladybug, who gains the power of creation in order to stop Monarch and his akumatized villains. She is also the leader of the French Miraculous superhero team.
Marinette is in her room above her parents' bakery. Tikki is floating around her happily.