Grey Alien (MMR)

A grey alien, as depicted in Motto Marutto Railgun IV

Aliens (宇宙人 Uchūjin?, lit. "Spacemen", alt. "エイリアン, Eirian"), also referred to as extraterrestrial life-forms (地球外生命体 Chikyūgaiseimeitai?), are theorized life-forms which do not originate from planet Earth. Although humanity has yet to encounter extra-terrestrial life, aliens feature prominently in science fiction, conspiracy stories and other parts of popular culture.

Although no truly extraterrestrial life-forms have been canonically confirmed within the Toaru series, aliens and various things associated with them have been referenced numerous times within the story.


The term Alien is derived, through Middle English and Old French, from the Latin aliēnus ‎("belonging to another, exotic, foreign"‎) itself derived from alius ‎("other").

Aside from being used to refer to extraterrestrials, the term can also be used to refer to an outsider and foreigner residing in a country, a life form from outside a considered family, group or territory, someone exclude from certain privileges, or a quality of something very strange and unfamiliar.


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Aliens, Greys, Martians, abductions (Fairy), UFOs, crop circles (Fairy), conspiracy theories, ancient monuments
Aiwass, Martian Microbes, Karasuma Fran, Fraulein Kreutune, Bunny Grey, Astrology, Cthulhu Mythos, Dragon

Among the many theories which have arisen surrounding the identities of Fraulein Kreutune and Aiwass are theories that they are aliens.[1][2][3] A number of the supposed phenomena which have been attributed to aliens, such as abductions and crop circles, have in the past been associated with supernatural entities such as fairies.[4]

Aliens often appear in modern science fiction and popular culture, and there are various fictional characters who are aliens. One such character is the British mascot Bunny Grey.[5][6][7]


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20th century


Toaru Majutsu no IndexEdit

Toaru Majutsu no Index: Mars SSEdit

Main article: Toaru Majutsu no Index: Mars SS

The conflict between Bisai Otome and Fleiss, which Kamijou Touma and Index got caught up in, involved the Martian Microbes, supposedly an intelligent life-form native to Mars, and the Mars World experiment to recreate the microbes and their environment.[8]

Shinyaku Toaru Majutsu no IndexEdit

Baggage City ArcEdit

Main article: Baggage City Arc

One of Kihara Byouri's Dark Matter-based transformations, Reference: Little Grey, was based on a Grey alien.[9]

Kamisato Rescue ArcEdit

Main article: Kamisato Rescue Arc
This section requires expansion

Karasuma Fran, Bunny Grey

Processor Suit ArcEdit

Main article: Processor Suit Arc
This section requires expansion

Coronzon - Karasuma Fran[10]

During its battle with Coronzon, Aiwass made use of the theory of it being an extraterrestrial life-form to compensate for the lack of an avatar as they entered outer space aboard the Windowless Building.[3]

Coronzon ArcEdit

Main article: Coronzon Arc

One of the Crowley's Hazards involved in the invasion of London had the appearance of an alien with an oversized head.[11] During the same incident, Lessar and a female knight were scared by Karasuma Fran descending from her illuminated UFO balloon like an alien.[12] The associations between UFOs and crop circles and theories of aliens building ancient civilizations were referenced at several points by several individuals during the incident.[13][14][12]

The next morning, when Coronzon was attacking locations remotely through the ley lines to stoke the chaos across the world as part of her preparations for the Ceremony of Mo Athair, at least one witness referred to the belief that aliens constructed ancient monuments.[15]

Toaru Kagaku no RailgunEdit

Toaru Kagaku no Railgun SS: Liberal Arts CityEdit

Main article: Toaru Kagaku no Railgun SS: Liberal Arts City

The Laveze Squadron involved in the Liberal Arts City incident were named after aircraft from the movie "Alien Wars" modified to fight UFOs.[16]

Motto Marutto RailgunEdit

Aliens, particularly the greys, were brought up numerous times in sketches where Misaka Mikoto, Shirai Kuroko, Uiharu Kazari and Saten Ruiko discussed conspiracy theories and the like.[17][18][19]


Extraterrestrial Dragon - Concept Design

The unused concept design for the 'extraterrestrial' dragon

  • One of the unused designs by Kiya Shii for the dragons which emerged after Kamijou Touma's right arm was severed in an incident during the Daihaseisai is for an "extraterrestrial" one.[21][22][23]
  • The premise of an interview with Kamijou Touma and Misaka Mikoto in Dengeki Splash!, gradually revealed throughout the course of the interview, is that Mikoto had apparently caught and defeated an alien trying to swap places with Touma, and had come to the beach with him(?) in order to bury the body. The ending of the interview implies that the aliens were not as defeated as she thought they were.[24]

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