FIVE Over Modelcase "RAILGUN"

The **FIVE\_Over Modelcase\_"RAILGUN"** (ファイブオーバー モデルケース・レールガン, *Faibuōbā Moderukēsu Rērugan*?) is a FIVE\_Over powered suit, which was created to replicate and exceed the powers of the 7 Level 5s using only technology.

After World War III, the Five Over Railgun has become a common sight in Academy City's large-scale military operations, substituting the HsPS-15 in operations like the assault on Baggage City or the chase after Kamijou Touma and Othinus in Denmark; another proof of Academy City's constantly improving technology.

## Appearance

Its appearance is described to be like a five-meter-long praying mantis. It has two arms, two legs, and two sickles that can fold if needed to help it stand up. Translucent wings spread out from the armor. A large cylinder-like thing used to store lots of shells rests on its back. There is also a shield on the front side of each of its front legs, with an artificial weapon placed between those shields, a 3-barrel Gatling railgun. The Five Over's body is apparently derived from a remodelled version of the Type: Mantis.

## Principles

With its name referring to the third strongest of Academy City, the main weapon of the Railgun Five Over are two 3-barrel Gatling railguns, each capable of shooting 4000 rounds per minute and overall a more powerful weapon than Mikoto's normal Railgun. Its gatling railgun's accuracy is not that great when shooting at targets more than one kilometer away, but it can offset that by firing thousands of rounds per minute or changing modes of fire. The barrels have two modes of fire, a proper Gatling mode and a mode where the barrels separate and shoot independently of each other, losing its rapid-fire capability but gaining accuracy. It’s an powered suit with the replicated power of the third Level 5, and is completely based on the philosophy of "using only technology to create one that exceeds the original". The FIVE\_Over can be worn by a human, but was later upgraded by Academy City to be able to operate without a person inside to control it as an unmanned weapon.

The Five Over has two translucent wings that use ultrasonic waves to mix the air around it to create an air flow that has a whirlpool-like effect that creates more buoyancy, allowing it to fly with smaller wings than what would usually be required. The Five Over can't compete with supersonic fighters built to fly at high altitudes, as it was made to attack ground targets, so its limit is flying above the ground like an attack helicopter. Originally, its flight capacity was developed to allow it to avoid standing on the uneven ground caused by its Gatling railguns. The FIVE\_Over also has multiple sensors that can be used to scan the battlefield for enemies and other threats and assess the risk they pose for the suit.

## Chronology

### Shinyaku Toaru Majutsu no Index

#### Freshmen Arc

*Main article: Freshmen Arc*
Kuroyoru Umidori has the dying Silvercross Alpha placed in it in order to dispatch and automatically pilot the power suit ; thanks to this, the FIVE\_Over's performance becomes greater than a simple AI-controlled suit. It later pursues Hamazura Shiage, Hattori Hanzou, Kuruwa, and Fremea Seivelun into a building in a coordination attack with other suits from Silvercross's collection.

After creating an elaborate trap and using various objects, Shiage and the others manage to take down the FIVE\_Over by damaging the suit to the point where its AI no longer becomes functional. When Kuroyoru attempts to kill Accelerator with thousands of artificial arms, the hijacked FIVE\_Over fires at her and destroys practically all of her equipment; Shiage had removed and replaced its control system with the Dragon Rider's suit, which allows him control of the FIVE\_Over.

#### Baggage City Arc

*Main article: Baggage City Arc*
During Academy City's suppression of Baggage City, unmanned variations of the Modelcase\_"RAILGUN" is deployed en masse and are used as the main ground units against Science Guardian’s unmanned powered suits and tanks. With the HsB-07, they show the technological superiority of Academy City. Kamijou Touma later mentions seeing the remains of a few Modelcase\_"RAILGUN"s when he was there.

#### Magic God Othinus Arc

*Main article: Magic God Othinus Arc*

After Touma finished his negotiations with Roberto Katze about what to do with Othinus, several tanks used by the Danish military as part of their diversionary forces for Operation Norse Wind are enveloped in an explosion. After getting his bearings again, he sees the cause of the explosion was of an incoming fleet of around 150 FIVE\_Over Modelcase\_"RAILGUN"s. The unmanned FIVE\_Overs then begins a biometric scan for Othinus and Kamijou Touma with instructions to eliminate any and all interference while broadcasting a message of their intentions to those in the surrounding area via speakers from the remaining tanks. As the fleet begins to close in on the fleeing duo the system for the FIVE\_Overs is suddenly hacked and had their preparations for the firing sequence interrupted. As a result FIVE\_Overs begin falling out of the sky and even crashing into one another, as the area clears up Touma notices that all of the FIVE\_Overs covering the snowy plain all had their heads tilted focusing on one fellow machine in particular, the reason for this is revealed to be Misaka Mikoto riding atop the central FIVE\_Over, now under her control.

Touma then proceeds to release the FIVE\_Overs from her control one by one using the Imagine Breaker forcing her to deal with the now rampant machines. Because of this action not only is she forced to destroy the FIVE\_Overs, but machines that might have been freed and ones that might have been in the confusion of the battle dealing with the others as well. Touma, having disappeared in the confusion, reappears on the back of an offline unit she is standing on in order to fight her. After the fight, Mikoto stays behind to hold off the remaining FIVE\_Overs that would eventually escape from the control of her hacking.