Misaka 10031

Misaka 10031 (ミサカ10031号) is a Misaka Mikoto clone that appears in both Toaru Majutsu no Index and Toaru Kagaku no Railgun. Originally having a small role in Toaru Majutsu no Index, her character was later expanded in Toaru Kagaku no Railgun. She is the 10031st clone to be produced and killed by Accelerator for the Level 6 Shift experiment, she is also the first clone Kamijou Touma meets.

Appearance
She looks the same as Mikoto, although for emphasis her eyes are drawn in a different way. Goggles and blue-striped panties are common to all Misaka clones and Misaka 10031 is no exception to this.

Personality
She has the same personality as most clones, with emotions that have been surpressed as they weren't beneficial to the experiment. Despite this, she still feels pain and is hurt when Mikoto drove her away when she tried to cheer her up, because of this she was a little saddened.

Another slight hint of personality is shown when she behaves seriously, confronting Mikoto and Touma about having "robbed" a vending machine, she properly recited every legal article that the couple ignored while committing the "felony", expressing disappointment on them for engaging in such activities. Unfortunately 10031's nagging was cut short by Mikoto's aggressive personality which dragged her out of the scene to question her about the situation with the experiment.

Background
Not much is known about her, though as a clone she was most likely produced a few months prior to her introduction in the story. Before meeting Mikoto and Touma she was researching around the area where they were staying.

Sisters Arc

 * Main article: Sisters Arc

She appears briefly in Toaru Majutsu no Index during the Sisters Arc, where she discovers Mikoto Misaka and Touma Kamijou together after Kuroko Shirai left them. Here, she states that she is Misaka to Touma, which confuses him since she's not using her given name to refer herself when she was in the presence of Mikoto. Misaka 10031 tells them that she is here researching before being taken away by an uneasy Mikoto.

Her appearance is expanded in Toaru Kagaku no Railgun, where after being taken away by Mikoto. Here, she confirms to Mikoto's horror that experiments is still going on despite her efforts the other day, and reports that Misaka 10020's experiment has already concluded. Mikoto becomes thoroughly disgusted, and in the depths of her despair recalling the death of Misaka 9982, tells Misaka 10031 to stop appearing before her with 'that' form. Despite trying to cheer her up with a cat that reminds her of the cat Mikoto and Misaka 9982 rescued, she was pushed away through Mikoto's words and left her, though Mikoto later regretted her actions.

The next day, Misaka 10031 takes her physical examination before her battle with Accelerator and is clearly depressed. She tries to ask to one of the researchers what they would do if a clone of themselves were to appear before them, predictably one of the researchers shows great revulsion for such a concept. This makes Misaka 10031 conclude that Misaka Mikoto truly does not want her to exist.

In both Toaru Majutsu no Index and Toaru Kagaku no Railgun, Misaka 10031 battles Accelerator. Despite her efforts she is obviously defeated; before being killed by Accelerator, he states the true nature of his powers, "vector change", and says that he can change the vectors of anything with just the touch of his skin. He demonstrates his powers on Misaka 10031, by touching her wounds and brutally killing her by reversing the flow of her blood.

Meanwhile, Mikoto who has recently infiltrated the now-abandoned Tree Diagram Information Receival Center, discovers that the Tree Diagram has already been destroyed, ruining her plan on stopping the experiment. Later, after destroying another facility involved in the experiments in a fit of rage, she discovers the battle of Misaka 10031 and Accelerator, and is utterly broken after seeing the death of Misaka 10031 in the hands of Accelerator.

Abilities
Like all the sisters, she is an electromaster.
 * Electricity: Being a copy of Misaka Mikoto, she has the same abilities but only 1/20000 of the original, bring her to level 2 or 3. However, as touma stated, 1/20000 of 1 billion volts is still 50000 volts.
 * Radio Noise: A form of telepathy between the sisters, it links her up to the "Misaka Network". This allows them to share memories and experiences.
 * Weapons & Gear: She uses the standard googles and uses a FN F2000 assault rifle during her fight with Accelerator.

Quotes

 * (In Railgun manga Chapter 33) "For Oneesama (the original), Misaka (referring to herself) is an existence she would like to deny."