A scientist employed within Academy City. She has poor common sense, which is demonstrated as she often strips in front of others without thinking about it, a result of her years being a researcher.

Academy City is a highly developed place in terms of technology. It is said to be 20 to 30 years ahead of the rest of the world, and 80% of its 2.3 million residents are students. The focus of studies here is directed towards esper powers. Misaka Mikoto, one of the top level espers in town, shares a room with Kuroko Shirai, another high level esper who is a member of Judgement, a law enforcing agency composed of students. Both attend Tokiwadai, a private school reserved for the high-leveled and the rich. Kuroko's partner at Judgement, Kazari Uiharu, is a low level esper who studies at Sakugawa middle school. Her best friend and classmate there is Ruiko Saten, a level zero, one who has no esper powers. Together, the four encounter several adventures in the exciting scientific town. 
(Source: Anime News Network)

__Agency:__ Mausu Promotion

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Atsuko Satou, known professionally as Atsuko Tanaka, was a Japanese voice actress and narrator.

Her most-known roles are [Medea](https://anilist.co/character/3440/) in [Fate/Stay Night: Unlimited Blade Works](anilist.co/anime/19603/), [Motoko Kusanagi](https://anilist.co/character/1795/) in the [Ghost in the Shell](https://anilist.co/anime/43/) franchise, [Lisa Lisa](https://anilist.co/character/21960/) in [JoJo’s Bizarre Adventure](https://anilist.co/anime/14719/) and [Konan](https://anilist.co/character/3179/) in [Naruto: Shippuden](https://anilist.co/anime/1735/). In video games, she voiced title characters Lara Croft in the Japanese dub of the Tomb Raider games, Bayonetta in the Bayonetta: Bloody Fate film adaptation and Bayonetta 2 and Kyrie Ushiromiya from Umineko no Naku Koro ni. She attended the Tokyo Announcement Academy where she studied voice training in 1991. In 2012, a Biglobe poll named her the voice actress with the sexiest voice.

Tanaka was married and had a sister. She also considered [Kikuko Inoue](https://anilist.co/staff/95195/) to be her best friend. Mother of voice actor [Hikaru Tanaka](https://anilist.co/staff/168156/Tanaka-Hikaru).

On August 20, 2024, it was announced that Tanaka passed away at the age of 61.

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 specials that were released on the 1st and 5th Blu-ray and DVD volumes.

Harumi Kiyama