Nana is the little daughter of Leon and granddaughter of Theo, a puppeteer. When she was still an infant, she got very ill, but she fully recovered later. Because of what happened to Little Nana, Leon's determination to become a doctor, which was opposed by Theo, became stronger. When Leon left his family, Nana was still a little baby. Little Nana used to believe that her father already lives in heaven. She believed it until she personally recognized her father, who is now a doctor. Nana and Grampa Theo were reunited with now Dr. Leon in Milan.