Eulalie was born at Saint-Antoine-sur-Richelieu on October 6, 1811. Her father owned extensive agricultural holdings and her mother, who had studied with the Ursulines in Québec City, instilled in her the values of prayer, justice and openness. Although she had a lively and playful spirit, Eulalie was limited by fragile health.
During the twelve years when she was managing the presbytery in Beloeil and facilitating parish activities, she discovered the pressing need for the education among the people of Québec. She observed that girls had little opportunity to be educated. In 1834, in company with Henriette Céré and Mélodie Dufresne, she founded the Congregation of the Sisters of the Holy Names of Jesus and Mary, a community dedicated to education in Longueuil.
She died at the age of 38 after six years of religious life. By that time, however, the Congregation had been solidly established. Beatified in Rome in 1982, Mother Marie-Rose rests in the co-Cathedral of Saint-Antoine-de-Padoue in Longueuil.