Typhoid Mary (Mary Walker), also known as Typhoid, Walker, Bloody Mary and Mutant Zero, is a fictional character, a supervillain and enemy of Daredevil and Deadpool in the Marvel Comics Universe.

Biography

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 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 of 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.

Suffering from dissociative identity disorder, Mary Walker has three other abnormal personalities in addition to her seemingly healthy one. Her "Mary" personality is a timid, quiet, pacifist; her "Typhoid" personality is adventurous, lustful, and violent; and her "Bloody Mary" persona is brutal, sadistic, and misandrous. Mary once claimed that there was a fourth personality, who is 'lost,' but it has not since been mentioned. Aside from highly developed martial arts skills, Walker also possesses telekinetic powers and, more dangerously, pyrokinesis, the ability to set people or objects in her immediate vicinity aflame.

In her first appearance, she met Matt Murdock, and was hired as an assassin by the Kingpin. She then first battled Daredevil, while beginning a romance with Matt Murdock. She temporarily reverted to her "Mary" personality, but then reverted to her "Typhoid" personality, and began a romance with the Kingpin. She hired Bullet, Bushwacker, Ammo, and the Wild Boys to attack Daredevil, and then personally led these criminals against him.

A favorite pawn of the Kingpin, Typhoid frequently battled and had a love-hate relationship with Daredevil before disappearing. Through hypnosis, the abnormal and psychotic personalities were suppressed from Walker's consciousness, and she began to lead a normal life, becoming an actress on a soap opera. She was sent by Doctor Doom to learn the secrets of Kymellian technology from Power Pack during the Acts of Vengeance. She was subsequently in the Kingpin's employ once again, and met Bullseye. She helped thwart an attempt on the Kingpin's life by Crossbones. At one point, as she struggled to keep her multiple personalities under control, she befriended Mary Jane Watson and battled Spider-Man when Bloody Mary resurfaced and she began killing men who committed domestic abuse. With the web-slinger's help, Mary regained control and voluntarily turned herself in to the police for treatment.

At one point, Mary was confined to a mental institution where each personality hired a mercenary. Mary hired Deadpool to kill her, Typhoid hired him to break her out, and Bloody Mary hired The Vamp/Animus to break her out to resume a killing spree. Deadpool defeated the Vamp/Animus but refused to kill Mary, allowing the Typhoid personality to become dominant. Typhoid and Deadpool had a few adventures together, including traveling to New York City to confront Daredevil for accidentally kicking her out of the brothel some years ago (Typhoid regained the memories of this incident when Deadpool pushed her out of a window), before Deadpool attempted to reform Typhoid. This did not go well and the two eventually separated after she seduced him while disguised as Siryn.

However, following the Kingpin's fall from power and subsequent near-death coma, he recovered and started rising back to power, taking out his enemies. To distract Daredevil while he retook his criminal empire, the Kingpin paid a visit to Walker at her show and, with a blunt slap, released the abnormal personalities. Murdock's bodyguards Luke Cage and Jessica Jones managed to take her down after she confronted Daredevil in his secret identity and set him on fire. Mary was imprisoned on The Raft, a maximum security prison for super-powered criminals.

Electro later led an attack on the Raft, breaking out the prisoners. While the Avengers arrived and managed to stop some of the prisoners, Mary managed to escape and was briefly mentioned as once more working for the Kingpin.


The Initiative

At some point after the events of the superhuman Civil War, Mary is found by Henry Peter Gyrich and recruited into the Initiative program. It is currently unknown whether she suffered some sort of psychotic episode which left her too unstable to be left to her own devices or whether she sought out treatment and joined of her own free will. Gyrich reveals that 'Mutant Zero' is a mutant that not only remained empowered following M-Day, but one that is not included in the official record of the remaining mutants. Technically not existing in any official capacity (according to Gyrich), Mary's true identity is made classified and she is given the codename of "Mutant Zero." According to Dr. Leonard Samson, Mutant Zero is still mentally unstable and that referencing any of her other identities could lead to a period of instability. Mutant Zero is inducted into the Initiative's black ops team, the Shadow Initiative, but due to her mental instability she can only be "activated" once per mission or risk her becoming mentally unstable.

When Taskmaster is appointed as field leader of the Shadow Initiative, he senses something familiar about Mutant Zero's body language (thanks to his superhuman ability), and initiates an impromptu sparring match with her to satisfy his curiosity. After witnessing her fighting style and provoking her into using her pyrokinesis, Taskmaster shatters her helmet's faceplate and reveals her as Typhoid Mary.

As the Shadow Initiative prepares to capture Hardball in Madripoor, Mary reveals that the reason why she joined the Initiative is because she couldn't merge or block out her four personalities, so she offered to join in exchange for a pardon and to help integrate her fractured mind, which is still a work in progress. During the Shadow Initiative's fight against HYDRA, Mary loses control of her personalities, having spent too much time from the Zero Room, and flees into the wilds of Madripoor.


Shadowland

Mary answers Daredevil's call for superheroes to join him and The Hand in providing martial law for an ever increasing area of New York City. She claims that her time in the Initiative was successful in integrating her fractured mind, but Daredevil does not believe her. Following the war, Kingpin - using secret code words to activate her fourth personality - reveals that she was an inside agent who was ignorant of her 'true' goal all along.


Sisterhood
Typhoid Mary joins the Sisterhood, as Lady Deathstrike promises to use Arkea to reintegrate Mary's personalities, which Arkea then does. The sisterhood, specifically Arkea and Amora, resurrect Selene and Madelyne Pryor. But before the Sisterhood can recruit additional members and go on an offensive, the X-Men attack. Typhoid Mary is defeated by Psylocke. Arkea is killed, while Madelyne swears to maintain the Sisterhood and continue the war against the X-Men.

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