Montserrat Grases was a Catalan laywoman and member of Opus Dei who lived in Barcelona from 1941 to 1959. Known affectionately as Montse, she was recognized for her deep piety, cheerful spirit, and her dedication to serving the poor and teaching catechism to children. Even after being diagnosed with bone cancer, she maintained a serene attitude, offering her physical suffering for the intentions of the Church and the founder of her spiritual organization. She died at the age of 17, having lived a life characterized by heroic virtue.