Shinobu is a student from Nagatenjouki Academy, who worked on the Sisters experiment before it was shut down. She was called again when the Sisters were being used for the Level 6 Shift program. However, when she noticed the Sisters had something of a conscience, she was unable to see them as objects. She attempted to stop the experiments by using envelopes containing cash cards to fill the unwatched alleyways they are held with human eyes. She does not appear to have any powers, but uses good acting to invoke fear into enemies and make them believe she has a deadly one. In fact, she referred to her 'powers' as "Critical", a power which, according to her, can be used only on opponents she has touched. It is through her that Mikoto learns about the Sisters experiment. She later infiltrates one of the facilities involved with the Sisters project with the hopes of installing fear emotions into the Sisters, to cast doubt and the morality of the experiment but is apprehended by Saiai Kinuhata. 

The second season of Toaru Kagaku no Railgun. 
 
Something sinister is going on in Academy City. The shadows are filled with whispers of an organization cloning super-powered students known as espers. High-ranking master of electricity, Mikoto Misaka, laughs off these stories until she comes face to face with a copy of herself. After learning that these clones - her sisters - are being systematically murdered in a series of experiments designed to turn a sadistic killer into the strongest esper in history, Misaka vows to save her copies and destroy the organization responsible for the project. 
 
As Misaka prepares to face off against the organization’s power-hungry esper, she discovers that she wasn’t the only victim of the scientific forces conspiring within the city - and that’s something Misaka and the girls of Judgement simply won’t stand for. 
 
(Source: Funimation)

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Welcome to a world where mysticism and science collide, and supernatural powers are derived from either science or religion. At the heart of this world is Academy City, an advanced metropolis whose population is comprised mostly of students The majority of students are enrolled in the city's "Power Curriculum Program," where they must learn to master their latent psychic powers. Out of several million students, only seven are deemed powerful enough to have Level 5 status. 
Meet Mikoto Misaka, the third most powerful Level 5 esper in Academy City. Together with her best friends Kuroko Shirai and the other members of Judgment, a student-run law enforcement agency, Mikoto delves deep into the dark heart of the scientific sprawl she calls home, and uncovers secrets she wishes she hadn't! 
(Source: Seven Seas Entertainment) 
Notes: 
- Includes 8 extra chapters. 
- Volume 5's special edition includes the volume "Giten Railgun".

Toaru Kagaku no Railgun S specials that were released on the 1st and 5th Blu-ray and DVD volumes.

Shinobu Nunotaba