Anti-Art Attachment

The Anti-Art Attachment (対魔術式駆動鎧 (アンチアートアタッチメント)), A.A.A. for short, is a Powered Suit developed in Academy City and used by Kihara Noukan. As the name suggests, it is for use against magic,  though despite that, the suit has a connection with magic, specifically that of Aleister Crowley.

Principles
The Anti-Art Attachment is a powered suit comprised of various parts and components which are assembled around and connected to its user. Due to the suit's capabilities and the fact that Kihara Noukan's role is to target beings like Ladylee Tangleroad, Fräulein Kreutune, and Aiwass, it is likely that it was created and intended for his use alone.

The powered suit can apparently be called upon when needed with its parts being held in containers which are dropped around the user before opening up and automatically arrange itself around them. These containers are also quite powerful, easily destroying Molar Tooth, large floating spheres that can block tank shells, during Kihara Noukan's confrontation against Shundou Toshizou in Celestaquarium. More containers can be dropped to add additional components even in the middle of battle.

The components of the suit include things such as arms, weapons of various kinds, ammunition and armor, floating around the body like some pseudo-transforming robot. The unit can move in response to the users movements and commands, and reconfigure itself to match them. Several components directly equip to the user and in turn connect to others. The parts and weapons of the unit can be swapped out depending on the circumstances.

The amount of weapons used for this powered suit is described as on "the level of building a fortress", and with a level of firepower capable of making a crater out of a fortress built to withstand the strongest tanks. It can weigh more than twenty tons in all, but is capable of flying, in a way which seemingly ignores gravity, using rocket boosters which can propel it at speeds of over Mach 20.

Though it makes use of 'bizarre' techniques and may feel as though it is something unexplainable by science wearing the skin of a scientific weapon, the Anti-Art Attachment's basic frame is still that of a science side powered suit, and as such, it can still be manipulated by electromasters, regardless of firewalls and ID.

Components
The Anti-Art Attachment's arsenal includes guns, cannons, swords, spears, molecular vibration electromagnetic wave emitters, catapults, lasers and excitation emission rods for them, missile pods   with precision-guided missiles, plasma cannons, bunker busting and excavation drills, plasma blades, liquid weapon turrets with acid sprayers, flamethrowers and liquid nitrogen emitters,  gatling guns, rapid-fire cannons and a large caliber railgun, of the type carried on railways and meant for destroying fortresses. The unit's name is engraved on the sides of some of its components.

Among the unit's arsenal is a tactical armor-piercing drill, made of tungsten steel and running through the entire unit from front to back, dozens of meters long. Achieving speeds using the same electromagnetic acceleration as a railgun or mass driver, it produces immense destructive power through its rotation, being capable of breaking into an underground silo or destroying a military base. The drill's rotation can also be used to transmit extremely high-speed high-frequency vibrations. These vibrations can be used to convey the user's or another's will, and with the unit connected to Aleister Crowley, it can deliver his willpower in a strange form capable of killing a Magic God such as the weakened High Priest.

There are also pieces of armor which equip to protect the user, apparently providing a defense such that Kihara Yuiitsu couldn't think of a greater one, supporting legs to carry the weapons' weight, as well as rocket boosters to propel the unit.

External Link
The Anti-Art Attachment's primary function is more an application of medical technology than military technology. A form of external cyborg attachment, it forms a link between the user and another individual, allowing the user to remotely draw on their power. Noukan makes use of this connection to utilize Aleister Crowley's power and secret techniques, a use requiring an understanding of the world a step outside science. Noukan has been described as not just borrowing Aleister's power, acting similar to an elite soldier infiltrating enemy lines to lock onto an airstrike target with a laser sight. Using this connection, Noukan has been able to create a circular territory which displaces water from his vicinity, and deliver Aleister's willpower in a strange form which can kill Magic Gods, ones whom Aleister truly hates.

In a scan of the Anti-Art Attachment's operating system, this function of the Anti-Art Attachment appears similar to a closed circle, not functioning as a circuit and usually not able to be read properly, with the chance of one being sent elsewhere if the link to the 'outside' is carelessly accessed. The Anti-Art Attachment can be used regardless of whether one has a proper understanding of this function (though it defeats the purpose it was meant for), but using the Anti-Art Attachment can result in this power being used even if the user doesn't intend for it, and as with any other form of magic, will cause a rejection reaction in espers.

Storage Facilities
Noukan has a hangar for the Anti-Art Attachment in each of the twenty-three School Districts in Academy City. These storage facilities are often disguised as another type of facility, such as a industrial refrigeration warehouse (School District 7), a papermaking factory, or an aircraft maintenance bay (School District 23).

As well as the Anti-Art Attachment's components, the hangars also contain ammunition, fuel, power sources and maintenance equipment necessary to support them, as well as ejection containers and large trucks to tow them, in order to transport and deploy the unit. Similar to the suit, the trucks can respond to Noukan's mental instructions.

Misaka Mikoto's Version
Following her initial encounter with the powered suit, Mikoto had a modified version created for her own use, acquiring a hangar at Tokiwadai Middle School and starting a club in order to maintain it. This Anti-Art Attachment possesses most of the armaments used by the original version. Mikoto has attempted to reconstruct the original's 'black box', but apparently hasn't been able to recreate it.

Kihara Yuiitsu's Version
During her battle with the Kamisato Faction below the Windowless Building, Kihara Yuiitsu constructed her own Anti-Art Attachment, devouring the remaining Elements to use as material for the unit. Yuiitsu used a different approach from Noukan, without any help from Aleister, and as such her Anti-Art Attachment isn't connected to Aleister and his power. As Yuiitsu doesn't fully understand the original, she is only reproducing its destructive power. Being constructed from Elements, Yuiitsu's A.A.A. shares some of their traits, such as their ability to blend in with the background and their vulnerability to Imagine Breaker.

Yuiitsu's A.A.A. has a cold yet streamlined and biological appearance, with large portions being translucent. Sharp, crystalline protrusions extending from her back, form a pair of giant wings, with other protrusions resembling eyeballs, claws and fangs. Two long, narrow boosters are positioned on the back of the unit and produce a red light when lit. The unit includes a variety of cannons, lasers, anti-air guns, launchers and armor parts. One of its notable weapons is a giant anti-special steel chainsaw, with 'Dog's life' on its surface and a golden retriever head logo inscribed on its surface. The unit also has a variety of sensors and other features to assist in aiming and diverting impacts.

Mental Out Arc
Kihara Noukan was first seen using the Anti-Art Attachment during his confrontation with Shundou Toshizou at the Celestaquarium, with the containers being dropped through the roof and destroying the Molar Tooth before being deployed for the execution, the killer whale being helpless with the water removed from its surroundings.

St. Germain Arc
During the events instigated by St. Germain at the Dianoid, Noukan selected equipment for the unit in preparation for the upcoming confrontation with the true Gremlin. After Aleister weakened the Magic Gods, Noukan used the unit's catapult to launch the crucified body of Zombie into their midst.

Magic God Invasion Arc
As the High Priest attempted to crash the Arrowhead Comet into Academy City, Kihara Noukan used the unit, equipped with the tactical armor-piercing drill and connected to Aleister, to deliver Aleister's willpower in a form which killed the Magic God. Noukan and the Anti-Art Attachment then destroyed the comet before it could impact the city, meeting it in a collision at over Mach 20.

World Rejecter Arc
That night, Aleister had the Anti-Art Attachment overhauled and prepared for Noukan's battle against Kamisato Kakeru, though he implied in his conversation with Noukan that he wouldn't be able to win with it. Later, Noukan used it during the confrontation, but due to its connection with Aleister and his conflicting desires, it proved a valid target for World Rejecter and was subsequently erased by it. Noukan continued to fight without it, but sustained mortal injuries and had to be placed into cold sleep by Kihara Yuiitsu to preserve his life.

Salome Arc
On December 4, Kihara Yuiitsu brought Kihara Enshuu to help her investigate some of the Anti-Art Attachment's damaged components in order to learn more about Noukan and the enemy which defeated him. When Enshuu mentioned similarities to when she tried to read Kihara Kagun and how it felt like that there was a link to the 'outside' rather than unreadable files within, Yuiitsu realized that Enshuu had been manipulated into isolation to prevent her from decoding this, by Aleister through the use of the Archetype Controller. From the nature of the scars on the Anti-Art Attachment's wreckage, some baring signs of a handprint, Yuiitsu made deductions regarding the nature of the World Rejecter which she used to plot her revenge.

The following night, during Yuiitsu's battle against Kamijou Touma, Salome and Misaka Mikoto, Mikoto was accidentally thrown into one of Noukan's storages and encountered the Anti-Art Attachment, which assembled and reared up, as though appraising her as a potential user. Unable to fully read its systems and recognizing the potential danger, Mikoto was initially reluctant to make use of it but was soon forced to use it in order to save Touma from Yuiitsu. The attack was cushioned by the Windowless Building preventing the damage from being spreading across the city, and severely injured Yuiitsu. Afterwards, the Anti-Art Attachment separated from Mikoto, who after a brief period of joy was puzzled to find herself bleeding. The contact between the two was deemed a threat by Aleister, who considered eliminating her.

Element Arc
Following her initial encounter with the Anti-Art Attachment, Mikoto had a modified version of it created for her own use, acquiring a hangar and starting a school club in order to maintain it. She made extensive use of it against the Elements during the city-wide heat wave. During her battle with the Kamisato Faction below the Windowless Building, Yuiitsu cannibalized her remaining Elements for her own version of the Anti-Art Attachment.

Trivia

 * The Mikoto version of the Anti-Art Attachment was designed by Kasai Shin.