In 1690, Louis-Joseph d'Albert de Luynes and three other Assassins were sent by their Mentor to recruit her into the Brotherhood, but due to d'Albert's misogynistic comments they failed. D'Aubigny attacked the Assassins, defeating them and injuring d'Albert's shoulder. The Assassins made their report with the Master Assassin Maréchal, with d'Albert stating that she had no potential as an Assassin.
Despite the first failed attempt, the Brotherhood succesfully recruited Julie, and Maréchal personally trained her to hone her acting skills.
- Historically, d'Aubigny fought in a duel and wounded a young nobleman who had insulted her while she was wearing men's clothing. The next day, she asked about his health and found out he was Louis-Joseph d'Albert Luynes. Later, one of his companions came to offer d'Albert's apologies. She went to his room and subsequently they became lovers and, later, lifelong friends.