Mary Bromfield, also known as Mary Marvel, is a character from the Shazam universe. She is the adoptive sister of Billy Batson and one of the Shazam Family members. Mary is known for her intelligence, kindness, and strong moral compass. In the series, she gains the ability to transform into a superhero with powers similar to those of Shazam. Her role is crucial as she provides emotional support and guidance to her siblings, while also fighting alongside them to protect the world from various threats.