Born the last of five daughters to the Commander of the Royal Guards, General François Augustin Regnier de Jarjayes she is raised by her father as if she were a boy in order to take his place and command the Royal Guards serving at Court after he retires. At the age of fourteen, as soon as her training in the basic military skills is complete, Oscar is given the task to protect the Dauphine Marie Antoinette when she arrives at the French Court. Despite being raised as if she were a boy and dressing in males' clothes, Oscar is open about being female. Even as she embraces her femininity, she uses her male position to gain freedoms that she could never have as a lady of the court.
