Rex Graine is a newspaper reporter for the Daily Crusader. He is known for his uncompromising principles and incorruptibility. In order to fight crime Graine will wear metal gloves and a steel mask that resembles a placid face, thus becoming Mr. A. In keeping with the hardboiled detective theme, both personas typically wear suits and fedora hats; Mr A's outfit is completely white. Mr. A uses half white-half black cards to signify his arrival, as well as to represent his belief that there can only be good and evil, and no moral grey area.