A Certain Magical Index/Characters/A Certain Scientific Railgun Sub-Series Protagonists

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The heroines of A Certain Scientific Railgun, the spinoff Prequel and side story of A Certain Magical Index, which places its protagonists focus on Mikoto Misaka.

They are a quartet of junior-highschool girls, whom through the law enforcement ties of Kuroko and Kazari, (not to mention the enthusiasm of Ruiko), become involved in the myriad of Urban Legends that permeate Academy City. Soon becoming fast friends, they form a "detective club" of sorts that sets out to solve the mysteries of this sprawling metropolis.

Our quartet of heroines share the following common tropes when they are together:

Our Quartet of Heroines

Mikoto Misaka

See her entry on the A Certain Magical Index main characters page.

Kuroko Shirai

300px-KurokoShirai 391.jpg
Voiced by Satomi Arai

One of the main characters of A Certain Scientific Railgun, she is Mikoto's junior in Tokiwadai Middle School, a Level 4 Esper, and a member of Judgment. She has an obsessive crush on Mikoto, who she calls "Onee-Sama", and is on the constant lookout for a chance to... get close to her (which Mikoto rarely allows and even more rarely appreciates).

  • Abhorrent Admirer: Zig-Zagged depending on her clingyness.
  • Alpha Bitch: Her attitude at times.
  • Amusing Injuries / Slapstick Knows No Gender: It seems Saeba Ryo's problem also applies to female perverts.
  • Arbitrary Skepticism:
    • Like Mikoto, she doesn't believe magic exists, even after being grabbed by a giant stone golem. To be fair, most of the magic that she has seen could be mistaken for esper abilities.
    • Similarly, she doesn't believe in the various urban legends of Academy City, like Gemstone espers, Level Upper or Imagine Breaker. She does learn that Level Upper is real, but is still unaware of the others.
  • Authority Equals Asskicking
  • Awesomeness By Analysis: To teleport, she has to make calculations on factors like mass, volume, vector, etc.
  • Back-to-Back Badasses: With Mikoto and Mitsuko.
  • Badass Adorable
  • Barely-There Swimwear: Her outfit in Episode 13 is unforgettable.
  • Batman Can Breathe in Space: In Railgun S, she and Mikoto are launched high into the atmosphere. However, they are visibly choking as they fall back down to earth, and it wasn't exactly a hard vacuum.
  • Beauty Is Never Tarnished: Averted in that she is injured quite often, a notable example being the fights against Awaki which leave her wheelchair-bound for the Daihaseisai arc. However, she's never left with any scars.
  • Borrowed Catchphrase: Taken Up To Eleven in the finale of Railgun S, where every single member of Judgement uses her catchprase.
  • Bunny Ears Lawyer: Yes, she is completely obsessed with Mikoto. But she's also an experienced member of Judgment who is skilled in the detective/law enforcement required for her job.
  • Catch Phrase: "I'm/We're from Judgement!" and "Onee-Sama!"
  • Clingy Jealous Girl: She doesn't like Mikoto being near Touma, no matter the reason. When she brings him to Tokiwadai in NT Volume 16, she wants him thrown out (back into the scorching, Element-infested city). It's always Played for Laughs.
  • Cry Cute: Towards Mikoto's rejections.
  • A Day in the Limelight: Volume 8 of the novels, or the Remnant arc in the anime (Episodes 6 and 7 of Season 2).
  • Electric Torture: How Mikoto usually rewards her attempts to have sex with her, and always Played for Laughs.
  • Everyone Has Standards: Despite her usual behavior towards Mikoto, she does genuinely help her when she needs it.
  • Expressive Hair: Her pigtails.
  • Fille Fatale: A bit too sexually aggressive for a thirteen year old girl for comfort...
  • Forgets About Her Powers: Despite her often ingenious uses of her power, she sure gets punched in the face a lot for someone who can teleport instantly. Justified in that teleportation powers rely on incredibly complex 11th dimension calculations, something that even a Level 4 like Kuroko has difficulty with when she's caught by surprise or dealing with unpredictable situations. Unfortunately, teleportation is not something one can do by instinct.
  • Girlish Pigtails
  • Hard Head: She would already be a vegetable were it not for this trope, considering how she normally deals with stress. See Use Your Head below.
  • Handicapped Badass: A temporary version. Her injuries in the Remnant arc force her to stay in a wheelchair for most of the Daihaseisai. However, she's nevertheless able to fight, even using the wheelchair itself as a weapon.
  • Head Desk: See Use Your Head below.
  • Hidden Depths: She genuinely cares for her friends, and is serious about her duty as a member of Judgement.
  • Improbable Weapon User: Her primary weapons are needles, kept in belts on her thighs, which she teleports into people's clothing (or into their bodies, if she has to get serious).
  • Japanese Pronouns: Uses watakushi, the more formal form of watashi, as a first-person pronoun, which is linked to her being an Ojou.
  • Laser Guided Amnesia: Misaki erases her memories of Mikoto during the Daihaseisai arc, to ensure that Mikoto wouldn't get them involved. These memories are restored at the end of the arc.
  • Little Miss Badass
  • Locked Out of the Loop: Has no idea of the Sisters, of Mikoto and Touma's adventures, or of the existence of magic.
  • Lovable Sex Maniac: There's something very funny about her attempts to get frisky with Mikoto.
  • Meaningful Name: Shirai Kuroko's name literally translates as "White-Well Black-Girl", a contrast that reflects her outwardly cute but inwardly perverted persona. Mikoto even points this out in Episode 2 before beating her senseless, shouting "I'm gonna fry you as black as your name!!"
  • Moment Killer: Amazingly, in addition to the usual examples, Kuroko is this to herself. Many is the occasion where she has a touching, heartwarming moment with Mikoto, only to have her feelings get the better of her and abruptly launch herself at Mikoto getting beaten down as a result. She also has a habit of ruining tender Touma and Mikoto moments.
  • Murder the Hypotenuse: See Ungrateful Bitch below.
  • No Sense of Personal Space: To Mikoto, very frequently.
  • Ojou: Her highly refined and ladylike speech-pattern fits this trope perfectly. On the other hand, she possesses some decidedly unladylike tropes.
  • One Girl Army: Due to her very intelligent use of her already flexible power.
  • Power Perversion Potential: Which she uses to her full advantage. She can teleport a person's clothes off their body.
  • Psycho Lesbian: A rare fundamentally good and heroic example of this trope.
  • Rape Is Love: "If you're more forceful, they'll have to pay attention", so she reasons.
  • Reasonable Authority Figure: Were it not for her perverted streak, Kuroko is the picture of a responsible, by-the-book, and honest "Good Cop" in the Judgment Brigade.
  • Schoolgirl Lesbians: Although it plays a minor part in Index, it's cranked Up to Eleven in Railgun.
  • Single-Target Sexuality: Even though she's a lesbian, the only girls she’s ever interested in are the Misakas. Yes, not only Mikoto but her mother as well! There's a reason why Mikoto keeps the existence of the Sisters a closely guarded secret. When her memories of being Mikoto's friend are erased, she claims that she isn't into girls.
  • Star-Making Role: For Satomi Arai. It even landed her a "Best Supporting Actress" trophy for the 2010 Annual Voice Actor Awards.
  • Teleporters and Transporters: Her Esper power, "Teleport".
    • Tele Frag: By teleporting one object over another, she can displace matter occupying the old space. She once tore down a building by teleporting sheets of glass into the support pillars using this feature of her esper power.
  • Third Person Person: On occasions.
  • Token Lesbian: She has Single-Target Sexuality aimed at her roommate Mikoto Misaka.
  • Tomboy and Girly Girl: With Mikoto; she's the girly girl.
  • Too Kinky to Torture: To be fair she had just (accidentally) taken an aphrodisiac, which was probably responsible for her reaction. It's still not really too out of character for her though.

Kuroko: "Oh, the whip of Onee-sama's love!"

  • Twin Tails
  • Ungrateful Bitch: Vows to murder Touma for (unwittingly) earning Mikoto's love in spite of the fact he saved her from a painful certain death at the hands of a superior teleporter.
    • YMMV, as going by later interactions she wasn't actually serious about said vow.
    • Also, some degree of Status Quo Is God may be in play.
  • Unknown Rival: Touma is oblivious to how much she wants to get him out of the way so she can have Mikoto all to herself.
  • Use Your Head: How she literally beats the frustration out of herself.
  • Verbal Tic: "Desu No"
  • Yandere: See Ungrateful Bitch above for more details. It's played entirely for laughs, though.

Ruiko Saten

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Voiced by Kanae Ito

Uiharu's friend and classmate, a Level 0 from Sakugawa Middle School, and another protagonist from A Certain Scientific Railgun. While she's not a member of Judgment, she does help them in any way she can.

  • Adaptational Attractiveness: In the anime.
  • Ascended Extra: While she has a major role in the Level Upper arc of the comic series, she's eventually shifted out of focus once that arc ends. In the anime, she's one of the lead characters.
  • Audience Surrogate: The only unambiguously "normal" human in the entire franchise.
  • Batter Up: Often carries an aluminum baseball bat.
  • Blow You Away: Her ability while under Level Upper. All There in the Manual: it's the ability codenamed "Aero Hand", the exact same ability that Mitsuko Kongou has.
  • Chekhov's Gunman: It's because she's a Level 0 that she’s immune to the paralyzing "Capacity Down" sound wave, allowing her to save her friends from Telestina's clutches in the final episode.
  • Cool Big Sis: To Uiharu.
  • Despair Event Horizon: After she uses Level Upper and realizes she'll fall into a coma soon afterwards.
  • The Everygirl: The only non-powered member of the main cast. While Uiharu's weak esper ability is rarely mentioned, she is still a member of Judgement and a brilliant hacker. Ruiko is the only one who could be considered truly "normal" to the audience.
  • The Gadfly: She often flips up Uiharu's skirt, to the latter's embarassment.
  • Genki Girl: She tries to be one.
  • Heroic Bystander: In episode 1 she saves a little boy from being kidnapped by a bank robber who has powers. Then, in the finale she smashes the Power Nullifier the Big Bad is using to incapacitate Mikoto, saving the day.
  • I Just Want to Be Special: The poor girl just wants an ability, even if its only Level 1.
  • Laser Guided Amnesia: Misaki erases her memories of Mikoto during the Daihaseisai arc, to ensure that Mikoto wouldn't get them involved. These memories are restored at the end of the arc.
  • My God, What Have I Done?: After she and her friends use Level Upper, and one of them falls into a coma.
  • Name's the Same: Her surname is the same as a character in NEEDLESS, which led to some funny fanart.
  • Nice Girl
  • No Sense of Personal Space: Loves to flip Uiharu's skirt just to see her panties, especially if they're in public.
  • Odd Friendship: She seemed to have developed this with Xochitl, and later Frenda.
  • Plucky Girl
  • Rapunzel Hair
  • Sailor Fuku: Her school uniform.
  • Shipper on Deck: To Mikoto and Touma. In the folk dance at the end of the Daihaseisai, she concocts a plan to get them to dance together, by inviting Touma to a dance, pretending to be injured, and asking Mikoto to take her place.
  • Shut UP, Hannibal: Her Crowning Moment of Awesome in which she stops Telestina's gloating of humanity's supposed worthlessness by smashing the Capacity Down device paralyzing her Esper friends with one mighty swing of her aluminum baseball bat.
  • Star-Making Role: Kanae Ito's touching and sincere performance as an ordinary every-girl who nevertheless refuses to stop hoping and dreaming struck a chord with the audience as someone that anybody can relate to, and firmly established her place as a formidable character-actress in the anime landscape.
  • Stepford Smiler: In Academy City, life is hard for anyone who doesn't "measure up".
  • Too Dumb to Live: She was borderline during the the Railgun SS. She followed Mikoto into what was clearly an Off-limits area thinking it was a casino, where she nearly gets killed by Olive, and then there was the issue with Xochitl blackmailing her. She didn't piece together that those attacks were real until later and decided to investigate on her own, gets caught, and was about to be killed when Xochitl saved her at the last moment.
  • You Leave My Friends Alone!: She shouts this to Therestina as she destroys the device emitting Capacity Down.

Kazari Uiharu

300px-Uiharu Kazari 3924.png
Voiced by Aki Toyosaki

One of the main characters from A Certain Scientific Railgun and a minor character from Index. She is Kuroko's friend and colleague in Judgment, a Level 1 Esper who goes to Sakugawa Middle school and is known for wearing a headband made of flowers on her head (and sometimes a surgical mask in the manga). Usually shy and humble, her personality can quickly change to overly excited, especially if it concerns the life of the upper-class (particularly anything involving Tokiwadai).

  • Adorkable
  • Ascended Extra: Much like Saten, she's not really all that important outside of the first story arc in the original manga. In the anime, her importance is significantly boosted.
  • Badass Bookworm: She’s not a warrior in the least, but her computer expertise makes her just as (if not more) formidable as a dozen warriors in the right situations. She is in fact, so good at this that she can defeat even electrokinetic espers when it comes to hacking computers.
  • Cloudcuckoolander: She seems to edge into a state like this whenever she's in front of a computer.
  • Cuteness Proximity: She reacts this way to Mitsuko's pet snake Ekaterina.
  • The Cutie
  • Did You Just Flip Off Cthulhu? / Defiant to the End: In Volume 15 of the Index novels, Uiharu taunts the 2nd ranked Level 5 esper Kakine Teitoku, while he was in the middle of torturing her, presumably in order to buy time to let Last Order escape.
  • Flowerbed In Her Hair: Word of God says they're artificial.
  • Fluffy Tamer: Everyone else took one giant step back upon meeting Kongo Mitsuko's snake, Ekaternina. Uiharu stayed behind to coo over it!
  • Get a Hold of Yourself, Man!: In episode 23 of Railgun she suffers a Heroic BSOD when Telestina's true identity is revealed and she takes the children that were experimented on which results in some Inelegant Blubbering until Kuroko slaps her across the face and says "When are you going to stop crying?
  • Ill Girl: In the manga, where she suffers from constant bouts of the flu.
  • Kawaiiko
  • Kill the Cutie: Narrowly Averted in Volume 15 of the Index novels when she refused to tell Kakine Teitoku where Last Order was. Despite being physically brutalized, she refuses to tell him where she is amid sobs and having her bones snapped. Accelerator stops Kakine before he delivers the final blow. She gets better if we are to believe the New Testament Volume 1 illustrations.
  • Laser Guided Amnesia: Misaki erases her memories of Mikoto during the Daihaseisai arc, to ensure that Mikoto wouldn't get them involved. These memories are restored at the end of the arc.
  • Little Miss Snarker: Towards Kuroko.
  • Mission Control: Often plays this role, usually with Kuroko on the other end.
  • Nice Girl
  • Playful Hacker: She cheers on hackers that try to get past her firewalls ... but still defeats them in the end.
  • Plucky Girl
  • Sailor Fuku: Her school uniform.
  • Shipper on Deck: To Mikoto and Touma. When Ruiko managed to get the two to dance together, Uiharu physically restrained Kuroko to prevent her from interfering.
  • Sobriquet: Known as the "Goalkeeper" among hackers - when Konori-san uses the name in the Judgment office, Uiharu is puzzled by it.
  • What Kind of Lame Power Is Heart, Anyway?: As the only named Level 1 of the series so far, its no surprise her ability seems unimpressive. Her power is keeping things she holds at a constant temperature. Basically, she's a human thermos.
    • Inverse Law of Utility and Lethality: Her power is useless in combat, but it's pretty handy for everyday life.
    • Mundane Utility: Her power keeps whatever she's holding at a constant temperature, meaning hot food doesn't get cold and cold food never melts/thaws. Her employ-ability in just about any field from food service to nuclear science is astronomical.
    • Heart Is an Awesome Power: The jury is still out, but depending on how her power works and how it's developed (if it ever is), it could turn out to be pretty awesome as it may very well involve suspending the law of thermodynamics. It already suspends the Second law of thermodynamics.

For the supporting cast of this series, see A Certain Scientific Railgun Supporting Cast