Mary Howe was one of the prisoners of The Lucky Buckle Mine. Mary Howe, who was a short and stocky woman, had been sent to a prison in Canon City, Colorado for beating her husband senseless with his whiskey bottle. Just before the Chimera invaded Colorado, Mary, along with the other prisoners were evacuated to The Lucky Buckle Mine, where they were forced to mine for gold under the corrupt Warden Hiram Brewster. Mary was made to mine gold in Tunnel Five along with fellow prisoner Susan Farley.