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)) 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 comprised of various parts and components which are assembled around and connected to its user.

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 amount of weapons used for this powered suit is described as on "the level of building a fortress". The parts and weapons of the unit can apparently be swapped out depending on the circumstances. It can weigh more than twenty tons in all, but is capable of flying, in a way which seemingly ignores gravity, using light rocket boosters which can propel it at speeds of over Mach 20.

The Anti-Art Attachment's arsenal includes guns, cannons, swords, spears, flamethrowers, liquid nitrogen emitters, molecular vibration electromagnetic wave emitters, catapults, lasers, precision-guided missiles, plasma cannons, bunker busting drills, plasma blades, acid sprayers, gatling guns, rapid-fire cannons and a large caliber railgun.

The unit can also make use of 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.

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 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.

Due to the fact that Kihara Noukan's role is to target beings like Ladylee Tangleroad, Fräulein Kreutune, and Aiwass, it is likely that this suit was created for his use alone. Noukan has a hangar for the Anti-Art Attachment in each of the twenty-three School Districts in Academy City.

Mental Out Arc
Kihara Noukan is 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 selects equipment for the unit in preparation for the upcoming confrontation with the true Gremlin. After Aleister weakens the Magic Gods, Noukan uses the unit's catapult to launch the crucified body of Zombie into their midst.

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

World Rejecter Arc
That night, Aleister has the Anti-Art Attachment overhauled and prepared for Noukan's battle against Kamisato Kakeru, though he implies in his conversation with Noukan that he wouldn't be able to win with it. Later, Noukan uses it during the confrontation, but due to its connection with Aleister and his conflicting desires, it proves a valid target for World Rejecter and is subsequently erased by it.

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.