The KG-6 Sleipnir (スレイプニール Sureipunīru?) is one of the main Kataphrakts featured in the ALDNOAH.ZERO television series. It was used by the United Forces of Earth for training pilots in high school, but following Operation Earthfall it also also saw action on real battlefields. Despite being a training Kataphrakt, it became the signature unit of Inaho Kaizuka.

Technology & Combat Characteristics

Each unit is equipped with an automatic 75mm cannon with an attached grenade launcher, and a pistol and blade as sidearms. The standard machine has limited hovering capability.

It has deploy-able air bags around the pilot's head to absorb shocks whenever it receives impact. (AZ: "Beyond the Horizon")

The KG-6 Sleipnir appears to be a training unit for piloting the KG-7 Areion, and judging by the model number, its predecessor as well. Although the Sleipnir unit is widely considered inferior to the Areion, Inaho Kaizuka prefers the Sleipnir's superior mobility over the Areion's reinforced armor, which in most cases does little against the incredibly powerful weapons of the Martian Kataphrakts.

Despite being one of United Earth's most sophisticated weaponry, it is woefully outclassed by the Kataphrakts of the Vers Empire. Although it is worth noting that Martian Kataphrakts are fewer in number, overly specialized in one aspect and ignore all other aspects. Such as having one ability or weapon that while noticeably powerful, is hampered by some shortcoming like being close ranged. On the other hand, the Terran Kataphrakts are mass-produced, as shown with Inaho's confrontation with Vlad, the KG-6 Sleipnir is expendable and designed and armed to be more well rounded and versatile, especially in the right hands.

Special Equipment and Features

  • Stabilizers
A set of wings and small thrusters attached to the legs that allow the Sleipnir limited hovering ability, when active both open up into an "X" shaped array of wings with two wings on the side of each leg. They can also be used as a shield, but the destruction of the stabilizers impairs the Sleipnir's ability to hover and possibly it's ability to walk and run as well.
  • Grappling Hook
The Sleipnir is seen using a wired grappling hook with a arrowhead-like hook, it is deployed from the wrist near the joint connecting the hand.
  • Tactical Suit
The Tactical Suit is a set of add-on Reactive armor plates around the forearms and chest of the Kataphrakt. (AZ: "Phantom of the Emperor")
  • Belisalius Conformal Power Assist System (BAH-1X)
The Conformal Power Assist equipment has a set of maneuvering and stabilizing thrusters, missile carriers. As a whole it is acts as armor.
  • Parachutes
A parachute can be deployed from shoulder armor.


  • 75 mm Cannon w/Grenade Launcher
A bullpup rifle that serves as the Sleipnir's main armament. It's capable of firing High Explosive Incendiary (HE) or Armor-piercing Shell (AP) rounds depending on the situation. The cartridge is rectangular-shaped and is loaded horizontally right in front of the trigger.
  • Sniper Rifle
It is produced by "Clibanarius Defence Alternatives", a defense contractor for the United Forces of Earth.
  • Pistol
Although the Slepnir itself does not utilize a pistol, Inaho once used the pistol of Inko's Areion.
  • Knife
A short tantō knife is stored in the backpack of the Sleipnir and acts as its main CQC weapon of choice.
It is produced by "Clibanarius Defence Alternatives", a defense contractor for the United Forces of Earth.

Space Load-out

  • Recoil-less Cannon
In space battles, Sleipnir are equipped with high-caliber long-barreled recoil-less cannons, which directed the back blast of rounds out the back of the weapon when fired. This served to keep the craft stationary, even when drifting in the middle of space. In battle they were capable of firing high-explosive rounds.
  • Blades
A Sleipnir can store several blades in the containers that made up their "wings."
  • Grappling Hooks
A Sleipnir can be equipped with grappling hooks, allowing them to maneuver in the Satellite Belt.


The Kataphrakt was developed by the United Earth government in the face of the Martian threat. Students are taught to pilot it at High School. (AZ: "Princess of VERS")

Although it is one of Earth's most sophisticated weapons, these machines are too primitive compared to their Martian counterparts. However, when put in the capable hands, it is definitely capable of taking down the advanced Aldnoah powered Kataphrakts.  



  • The KG-6 Sleipnir appears to be named after a Sleipnir from Norse Mythology, this could be a reference to the fact that the Sleipnir has two arms, two legs and four wings.
  • An armored KG-6 Slepinir appears in Wind, Snow and Stars, piloted by Inaho. It is armed with the BAH-1X. Due to it being an armored variant, some fans have nicknamed it "KG-6 Full Armor Slepinir."