Merveilleuse

Etymology
Borrowed from.

Noun

 * 1)  A fashionable young Frenchwoman of the late 18th-century, characterized by extravagant dress sense and anti-revolutionary ideas.
 * 2) * 2007, Helen Constantine, translating Choderlos de Laclos, Dangerous Liaisons (1782), Penguin 2007, p. 111:
 * You are the reason I arrived indecently late at Madame de Volanges's and had all the old ladies thinking I was a Merveilleuse.
 * You are the reason I arrived indecently late at Madame de Volanges's and had all the old ladies thinking I was a Merveilleuse.

Etymology
Noun use of feminine form of merveilleux ‘marvellous’.