Nathalie Sancoeur is Gabriel Agreste's assistant. Officially. In reality, she is secretly his accomplice in his quest for Miraculous. Beneath a cold and insensitive exterior, Nathalie cares about Adrien. She is the one who convinced Gabriel to give Adrien a little freedom by letting him go to school. Nathalie gradually establishes herself as a substitute mother to Adrien. Nathalie is the holder of the Miraculous of the peacock, which grants the power of emotion. With the help of her kwami Duusu, she transforms into Mayura.