In contrast to her mother, who was loved by her pupils and respected at court, de Soucy was not as liked by her students, and was described as authoritarian and an intriguer.
Soucy accompanied the royal family to the Tuileries Palace in Paris after the Women's March on Versailles during the French Revolution in October 1789.
When the mob broke in to the chamber, Louise-Emmanuelle de Châtillon, Princesse de Tarente made a personal appeal to the leading Marseillais, who stated: "We do not fight with women; go, all of you, if you choose,"[1] after which the women were all allowed to depart the palace unharmed, some of them even escorted by the rioters.
[1] On request of the queen, she brought the royal adoptive daughter Ernestine de Lambriquet to safety from the Tuileries Palace.
[2] Passing the Carousel square in front to the palace, de Soucy left Lambriquet to fetch a coach.
[2] The alternative suggestion is that "Pierre de Soucy" was in fact one of the daughters of Renée Suzanne de Soucy, dressed as a boy in order to make the travel group less identifiable, as Marie Thérèse was estimated to have been exposed to threats not only from anti-royalists, but also from agents sent by foreign powers to kidnap her during her journey to the border.