Marinette Dupain-Cheng

(From the official Miraculous website)

Marinette Dupain-Cheng is an enthusiastic, positive junior high school student, and a loyal and sincere friend, eager to help others solve their problems. She has two dreams: to become a fashion designer… and declare her love to Adrien Agreste.
Marinette also has a secret: she is the holder of the Miraculous of the ladybug, which grants the power of creation. With the help of her kwami Tikki, she transforms into Ladybug to save Paris.