Pre A & A: HeroesEdit
Molly Walker is a little girl whose parents were murdered by Sylar, also stealing her father James Walker's power of freezing. She is discovered hiding at the crime scene by Matt Parkman's telepathy. Parkman later rescues her again from an abduction attempt by Sylar.
Later it is revealed that she is the Company's "Walker Tracking System", with the ability to locate anyone in the world by mere thought. Her powers were inhibited by the same neuro-degrading virus that killed Shanti Suresh, and are restored when Mohinder cures the virus using antibodies found in his own blood. Mohinder later protects Molly from Bennet, who planned to kill her and disable the tracking system in order to protect Claire. Matt Parkman, with whom Molly seems to have a strong connection, promises that she won't be harmed, as he only agreed to help Bennet because he was under the impression that the "Walker Tracking System" was technology-based.
Matt later starts protecting Molly with the help of Mohinder. Molly mentions that there is one person far worse than even Sylar whom she is afraid to locate: when she thinks about him, he can see her. Because of that, she suffers from nightmares. When Matt uses his powers to listen in to one of the dreams, he hears a man's voice telling Molly that he can see her. He finds out later that the voice inside of Molly's head is his father's. Matt asks Molly to find him and she gives Matt a complete address and apartment number. Matt's father retaliates by telepathically knocking her out and forcing her into an induced nightmare where she stays trapped inside her own mind.
Molly is rescued by Matt Parkman when he confronts his father within his nightmare world. As Matt reveals to his father his ability to manipulate the same dreams he can, Parkman traps his father within his very own nightmare, and he and Molly escape from the nightmare world.
Sylar and Maya eventually arrive Mohinder's apartment where Molly was staying; he calls Mohinder and tells him to come over to help Maya and him in exchange of Molly. After a confrontation between Sylar and Mohinder, Maya learns who Sylar really is, and activates her power, which also affects Molly, and Sylar convices her to stop in behalf of her. Once in Reed Street Laboratory, while being held as hostages by Sylar, Molly offers Maya to find her brother, but she can't because he is nowhere to be found, understanding he is already dead. After Maya revived with Claire's blood, Elle Bishop enters the place and makes Sylar run away, saving Molly, Mohinder and Maya from him.
Later on, Mohinder mentions to Maya that he dropped Molly off at an airport, having sent her to India to live with his mother.
In the graphic novel "Rebellion Part 6: Lost And Found", she seems to be going by the name Ujala (light) and living quiet and peacefully in India together with grandma Suresh, but the 'Rebel' team arrives and asks her to come with them and help finding missing posthumans. After being convinced by Mrs. Suresh, she guides 'Rebel' to Pittsburgh, where they find a train transporting sedated posthumans. Once inside, they manage to free Claude and Lee, but Micah and Abigail got trapped while Molly stayed hidden, so she can help them later. Once the train starts moving, West and Sparrow managed to stop it by derailing it, allowing Molly to free everyone trapped in the train. Micah ask Molly to find West and Sparrow, but instead she finally found the location of Monica
In "Rebellion Part 7: The Liberation of Saint Joan", Micah aggressively tries to make Molly talk, but she cries telling him how selfish he is for using everyone just to find Monica because she knows he will leave her aside. Finally, Molly reveals Micah her location but with the warning that Sylar will be close enough to kill him. Without hesitation, Micah leads the "Rebellion" team to Washington D.C., leaving the safety of Molly to Claude
In the graphic novel "Second Chances", Mohinder asks Molly to find Mira once he returned India; Molly finds her being held hostage by someone interested in Mohinder's research. Molly depicts herself to be more mature now ("I've grown up since you saw me last.").
Angels & AssesEdit
Powers & AbilitiesEdit
Molly describes her power as the ability to "find people". By thinking of someone, Molly can psychically determine their exact location fairly quickly and can point out their location on a map. She also receives psychic visions of the person's surroundings. The full extent of her power and what it can locate, beyond people, has not been revealed. Those with telepathic powers can detect and resist her attempts to locate them. She can only find people who are alive, as she unsuccessfully tries to find Maya's dead brother