Mary Elizabeth Dearborn (b. 1999) attended the Charmbridge Academy from 2010 to 2017. She is the younger sister of Darla and Hilary Dearborn, and has been described as "pretty, with eyes as dark as her hair." Sometime around 2008, Mary was selected by secret lottery as the Deathly Regiment's sacrifice to the Generous Ones for the year of 2010. In October of 2008, Darla had a vision concerning her sister during the initiation ceremony of the Mors Mortis Society. Darla then set out to find a way to prevent her death, going so far as trying to substitute another child for her sister.