Ninja

thumb|250px|Kouga kunoichi Oumi Shuri in stereotypical ninja attire.
 is a term referring to a type of covert agent or mercenary that existed in feudal Japan. They are in a state of decline in the modern age, despite some ninja clans still existing in modern times with some now operating globally, Sub.09 and are trying to restore their prestige in the world.
==Principles==
Ninjas were originally bandits that were hired by some powerful military leader. This humble origin allows for anyone to become a ninja. Ever pragmatic, the ninjas uses things from the clothes on their back or even the lack of it to their advantage. Moreover, ninjas always use contemporary weapons for their purposes and disguised them, such as arquebuses camouflaged as staffs and , Chapter 8 though is apparently not adverse into using traditional weapons like the uchine. They also apparently prefer weapons that don't stand out too much like an uchine, specifically those that can be concealed or disguised. Finally, ninjas apparently prefer to kill on the first strike and if that fails quietly retreat over a protracted battle. Chapter 18 Ninjas don't also lay down their lives for a single goal.
Houjou_sibling_flashback_-_Astral_Buddy_Ch26.png|A young Houjou Arei with her older brother Seigo, practicing with shuriken and kunai.
Kouga school.jpg|Training among the Kouga.
Mikoto being chased by ninjas.png|Mikoto in Kuruwa's dream, chased by stereotypical ninjas wielding shuriken and a kusarigama.
Mistaken expectations - Railgun Ch78.png|Mikoto in Kuruwa's dream, dismayed that ninjutsu doesn't involve giant frogs and shadow clones.
The distinct techniques practiced by ninja are often referred to as . Unlike the more fantastical depictions often seen in stories, the real tools and techniques tend to be much more mundane and grounded. Stereotypical depictions of ninjas, which in many ways differ from reality, often have them in black robes with a hood and cloth mask concealing their face apart from their eyes. Weapons often associated with ninja include , , , and short swords. Ninjas are often trained to possess considerable athletic abilities.
Alternative terms often used referring to ninja are and (the latter referring female ninjas).
===Recent History===
According to Hattori Hanzou, ninjas are supposed to be in supporting roles as they live in the hidden darkness out of protection and not be in the spotlight. However, as time went on, "pure lines" or families began to spring up like the Hattori and Iga. Hanzou argues that by the time ninjas have "pure lines" they cannot survive in the world. It is likely why the ninja are in a state of decline.
Currently, the Kouga and other ninja clans have been operational in the shadows for a long time and have managed to continue doing so even into the 21st century to varying degrees. Recently, due to changing times, the groups have been looking into Academy City's Power Curriculum Program and Gemstones, and, as such, have been seeking to obtain the means to develop genuine supernatural powers. They do not seem to have any awareness of the existence of the Magic side.
==Background==
Ninjas came about in feudal Japan, originally being bandits hired by powerful military leaders. Over time, ninja clans such as the Iga and the Kouga emerged, along with "pure lines" or families like the Hattori. Over the centuries, even as their primary period of apparent activity passed, various myths, stories and stereotypes arose concerning ninjas.
While some ninja clans are more or less extinct in the present day (either through gradual decline or extermination),Nogi Yasuhito, Twitter some clans and bloodlines, such as the Iga and Kouga, still exist in the shadows of the modern age, with some operating globally, but they are in a state of decline. As such, a number of them have trying to restore their prestige and place in the world, and to that end they have been looking into the possibility of obtaining advanced technology, capable of producing lost or imagined ninjutsu, or the means to develop genuine supernatural powers.
==Chronology==
===Toaru Majutsu no Index===
====Toaru Majutsu no Index Light Novel Volume SS2====
On the first Friday of October, Iga ninja Kuruwa caught up with Hattori Hanzou (who had hidden his status in Academy City as a Skill-Out) after pursuing him for half a year and clashed with him over her goal to revive the Iga and Hattori lines, having also been manipulated regarding the Gemstones.
===Shinyaku Toaru Majutsu no Index===
====Baggage City Arc====
In mid-November, several Kouga ninjas led by Oumi Shuri infiltrated the Natural Selector tournament for the sake of obtaining techniques for their clan, and subsequently got caught up in the battle which engulfed Baggage City.
===Toaru Kagaku no Railgun===
====Dream Ranker Arc====
While going through a number of Indian Poker cards, Misaka Mikoto and Kinuhata Saiai experienced ninja-related dreams originating from the Iga ninja Kuruwa, the former experiencing her training under Hattori Hanzou (somewhat different from what she expected of ninjas) and the latter reviewing secret seduction techniques, both to their respective dismays.
====Jailbreaker Arc====
In mid-October, several Kouga members led by Oumi Shuri, infiltrated Academy City with assistance from Tsurigane Saryou, a Kouga ninja who had previously gone in undercover as a Child Error, and participated in the Second Reformatory's Jailbreak Trial for the purposes of observing Academy City's technology and learning what they could for the Kouga. After the trial, when Tsurigane openly betrayed them and they learned of the apparent circumstances behind her change, Oumi Shuri decided as a senior ninja that Academy City's technology and techniques were something they should never touch again, leaving Tsurigane to be judged as its citizen. Following these events, after escaping from imprisonment, Tsurigane approached Iga ninja Kuruwa for training, hoping to regain Oumi's attention in another way.
==Known Ninja==
Name 	Status 	Affiliation 	Notes
Oumi Shuri 	Alive 	Kouga School 	
Asai 	Deceased	Kouga School 	
Sakata 	Deceased	Kouga School 	
Yasu 	Deceased	Kouga School 	
Tsurigane Saryou	Alive 	Kouga School (formerly) 	
Sugitani 	Alive 	Kouga SchoolShiokishi 	
Hattori Hanzou 	Alive 	Skill-OutHattori clan (formerly) 	
Kuruwa 	Alive 	Iga clan 	
Houjou Arei 	Alive 	Yumiya IrukaFuma clanNogi Yasuhito says the Houjou family name is a hint. Based on her name, Houjou is a ninja since they served the in Feudal Japan.	
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Category:Terminology