Typhoid Mary (Mary Walker), also known as Typhoid, Walker, Bloody Mary and Mutant Zero, is a fictional character, a supervillain and enemy of Daredevil in the Marvel Comics Universe. She first appeared in Daredevil #254, and was created by Ann Nocenti and John Romita, Jr.. Her name comes from early 20th century Irish-American cook and typhoid fever carrier "Typhoid Mary" Mallon.
In the pages of Avengers: The Initiative a mysterious character named Mutant Zero was shown. Writer Dan Slott stated that she was secretly a well-known character in disguise. She first appeared in Avengers: The Initiative #4 as a member of Henry Peter Gyrich's black ops team but it wasn't until issue #20 that she was finally revealed to be Typhoid Mary.
Typhoid Mary is an enemy and former lover of Daredevil with low level psionic powers, including telekinesis. She has been a professional criminal employed by organized crime syndicates as an assassin in the past. She is also truly and gravely mentally ill.
Her condition was accidentally caused by a pre-Daredevil Matt Murdock. He had tracked a villain down to the brothel where Mary worked. He attacked the man, but to his surprise, the girls working there came at him. Panicking, he lashed out, knocking Mary out the window. It was at this moment that Mary somehow became Typhoid Mary, vowing no man would ever hurt her again. In later appearances, however, she would imply that she was a victim of child abuse.
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