Mary is a supporting character in The Selection Series. She was one of America Singer's three maids, along with Anne and Lucy. Mary and Lucy seem to be best friends in the series. The three maids made all of America's clothes during the Selection.
Mary was born in the palace and she and her parents still work there. At the end of the series, she (and later Paige joins her) is the only maid of the three who is left to America's service, after Anne's death by the Southern rebels and Lucy's marriage to Aspen Leger. She is the designer of America's wedding dress.