Who was this Marie-Blanche, Visitandine that was listed on the genealogical chart at the Gallery House in Annecy, the Visitation Order’s first Monastery?

Madame de Sevigne
The chart showed that: St. Jane de Chantal’s son Celse Benigne had a daughter, Marie de Rabutin Chantal, who became famous at Madame Sevigne, an outstanding French letter writer, and who had married the Marquis de Sevigne. Most of us already knew that.

Francoise-Marguerite
Madame Sevigne gave birth to Charles and Francoise-Marguerite. Francoise wed Monsieur de Grignan and it was she who had 3 children, Marie-Blanche, the Visitandine, Pauline and an unnamed son on the chart.
So, where was Marie Blanche’s Visitation community and what was her vocation story?