Marie-Grace Rousseau Gardner is a girl from 1850s New Orleans. Similar to Josefina, her mother died before the events of the series. She makes a friend with Cécile Rey in her first days in New Orleans, although the latter is not interested at first. However, changes are in the air. Soon, Marie-Grace's singing teacher is found sick with yellow fever. Her father, who is a doctor, saves not only the teacher, but others with his help. Marie-Grace also rescues a baby and forms a close bond with other children. Themes include the loss of family and caring for others in need. Both Marie-Grace and Cécile were archived in summer 2014. Though Marie-Grace and Cécile are best friends, they shared the same level of importance and a few items in their collection as well as a book, unlike other Best Friend characters.