Gundam Ashtaron — Complete Guide | The Demon-Named Transformable Mobile Suit

What Is the Gundam Ashtaron — The Machine That Carries Its Brother, Shields Its Brother, and Destroys the World Alongside Him

It bears the name Gundam, yet it is no hero’s machine. No champion of justice sits in its cockpit. Named after “Astaroth,” one of the 72 demons of Solomon, this transformable mobile suit is the “Wings of Resentment” piloted by a younger brother who has sworn vengeance against the world.

The Gundam Ashtaron (model number: NRX-0015) is a transformable mobile suit appearing in the 1996 anime series After War Gundam X. Its pilot is Olba Frost, who together with his elder brother Shagia Frost forms the “Frost Brothers” working from the shadows. Designed as the counterpart to Shagia’s Gundam Virsago, the Ashtaron handles transformation flight and close-quarters combat with its Atomic Scissors on its own, while unlocking the ultimate weapon—the Twin Satellite Cannon—when coordinating with its brother unit. That is the purpose for which this machine was born.

When discussing the Ashtaron, the pilot Olba Frost is inseparable from the machine. A younger brother abandoned by the world, who alongside his only ally—his elder brother—seeks to destroy it all. That madness and desperation are embodied in the Ashtaron’s massive arms and wings.

“We must correct them all—the powerless Old Types, and the Newtypes who hold that power!”

Olba’s cry distills the despair and fury of those denied recognition as Newtypes. This article thoroughly covers every facet of the Gundam Ashtaron—its specifications, armament, pilot, coordination with its brother unit, and evolution into the Hermit Crab.

Basic Specifications — A Transformable MS Combining Power and Versatility

NRX-0015 Basic Specifications

Design Concept — “Shield and Wings for the Elder Brother”

To understand the Gundam Ashtaron’s design philosophy, one must first understand the Frost Brothers’ combat style.

Shagia’s Gundam Virsago specializes in long-range bombardment with weapons like the Mega Sonic Cannon and Strike Shooter. However, the Virsago alone lacks mobility and has no flight capability. This is where the Ashtaron’s role emerges—lifting the brother’s unit and flying, guarding the brother’s blind spots, and combining with the brother to unleash the ultimate weapon.

Despite boasting the largest frame among the series’ Gundams at 19.5 meters, the Ashtaron’s thrust output surpasses even the Gundam Airmaster—a Gundam specifically designed for aerial combat. This overwhelming thrust was essential for carrying the Virsago on its back while flying in MA mode.

In other words, the Ashtaron is not “a machine that operates independently” but “a machine that demonstrates its true value through coordination with its brother unit.” This design philosophy directly reflects the bond between Olba and Shagia—a relationship where neither can exist without the other.

Development History — The Reconstruction Committee’s “Shadow Aces”

The New Earth Federation’s Ambitions

After the 7th Space War destroyed civilization, the “Government Reconstruction Committee (New United Nations Earth)” rose to power seeking to reunify Earth. They secretly developed and operated Gundam-type mobile suits using war-era legacy technology, aiming to seize global supremacy.

The Gundam Ashtaron and Gundam Virsago were two Gundams secretly developed by this committee. Satellite System technology was split between the two units, designed to function as a Twin Satellite Cannon only when operating in tandem.

The Bond with the Frost Brothers

The exclusive pilots chosen for these two units were the Frost Brothers. Shagia and Olba possessed a special ability similar to Newtype powers called “Category F (Fake)”—Twins Synchronicity, a psychic connection between twins.

However, they were never certified as legitimate Newtypes and were branded “Category F.” “F stands for Fake”—this humiliation became the origin of the Frost Brothers’ hatred toward the world.

The Reconstruction Committee exploited both the brothers’ abilities and their grudge. They provided two Gundams and used the brothers as pawns for assassination, espionage, and combat. But the Frost Brothers were also using the committee—for their own revenge.

Weapons Breakdown — Crab-Like Arms and Versatile Attack Options

Complete Weapons List

Atomic Scissors — The Most Exotic Melee Weapon in Gundam History

The first thing that catches the eye when looking at the Gundam Ashtaron is the massive claws extending from both arms—the “Atomic Scissors.” Completely unlike standard mobile suit arms, these exotic weapons evoke the claws of a crab and stand as one of the most unique close-combat armaments in the entire Gundam franchise.

The Atomic Scissors are fully extendable, enabling diverse combat applications: seizing and crushing enemy units, piercing through armor, or sweeping enemies away with wide swings. They are far more than simple “pinching” weapons—the tips also incorporate thruster functions, enabling charging attacks powered by the scissors’ own propulsion.

Furthermore, two Scissors Beam Cannons are mounted inside the claws. The ability to fire beams at point-blank range during melee combat—clamp down, then shoot—creates a devastating combination that represents the Ashtaron’s greatest close-combat advantage.

Beam Spear — The Early-Game Multi-Purpose Weapon

The Beam Spear was the weapon the Ashtaron wielded in the story’s early episodes. A melee weapon usable as a spear, it could also transform into a crossbow mode for mid-range shooting—a versatile armament.

The crossbow mode, which fires beams like arrows, is visually striking—a medieval weapon reimagined for mobile suit combat, fitting perfectly with the “demon-named” Ashtaron. However, as the story progressed, it saw less use, with the Atomic Scissors taking over as the primary armament.

Trans System — When the Giant Commands the Sky

One of the Gundam Ashtaron’s most defining features is its ability to transform into a Mobile Armor (MA) configuration through the “Trans System.” While the Gundam Airmaster from the same series also uses a same-named system for transformation, the Ashtaron’s approach is entirely different.

Where the Airmaster transforms into a lightweight, high-speed fighter, the Ashtaron’s MA mode is a large, heavy aerial unit. In MA mode, a mono-eye is exposed, creating an imposing presence reminiscent of Zeon-type mobile armors. Four Nose Beam Cannons are positioned at the front, enabling bombardment during high-speed flight.

Most importantly, in MA mode, the Ashtaron can carry the Gundam Virsago on its back while flying. As the Virsago lacks flight capability, the Ashtaron’s MA mode was essential as its means of transport. Carrying the elder brother and flying—that is the Ashtaron’s most vital role.

Twin Satellite Cannon — The Ultimate Weapon Unleashed by Brothers

The Twin Satellite Cannon is the ultimate weapon that can only be used when the Gundam Virsago and Gundam Ashtaron coordinate together.

By combining the Virsago’s Mega Sonic Cannon with the Ashtaron’s Satellite Launcher and receiving microwaves from the moon, this weapon delivers destructive power rivaling the Gundam Double X’s Twin Satellite Cannon. While constrained by requiring two Gundams to combine, its power reaches levels unattainable by any single machine.

Operating this weapon requires the Frost Brothers’ Twins Synchronicity. Their minds synchronize to integrate the two machines into a single weapons system—a weapon that exists solely for the Frost Brothers.

Pilot — Olba Frost: Love for His Brother and Hatred for the World

The Brand of “Category F”

Olba Frost is a young man who possesses “Twins Synchronicity”—a psychic connection between twins—together with his elder brother Shagia. This ability resembled Newtype powers, but was classified as “Category F (Fake)” as something distinct from legitimate Newtype abilities.

The brand of “Fake.” Possessing power equal to or exceeding Newtypes, yet denied recognition as “the real thing.” This unjust treatment warped both Olba’s and Shagia’s personalities, nurturing a thirst for vengeance against the world itself.

Absolute Loyalty to Brother Shagia

Olba’s verbal tic is “Nii-san” (Brother). In every situation, he calls his brother’s name, follows his brother’s judgment, and fights for his brother’s sake. His devotion transcends partnership—it borders on religious devotion.

However, while Shagia is a cool, collected strategist, Olba is emotional, proud, and quick to anger. These personality differences repeatedly create cracks in the Frost Brothers’ operations. Olba loses control emotionally, and Shagia reins him in—this dynamic between the two is reflected in their machines’ characteristics. Virsago’s cold, long-range bombardment versus Ashtaron’s brute-force melee combat mirrors the brothers’ personalities precisely.

“A captive princess… I’ve come to escort you…”

As this line directed at Tiffa Adill demonstrates, Olba has a distinctively theatrical way of speaking. But behind that elegance lurks hatred intense enough to burn the world to ashes.

The Rivalry with Garrod Ran

For Olba, Garrod Ran is the most infuriating existence imaginable. Not a Newtype, not of any special lineage, just an ordinary war orphan—yet this Garrod naturally obtains the “comrades” and “belonging” that the Frost Brothers desperately want but can never have.

“You and I are destined rivals!”

Olba’s declaration is simultaneously a rivalry challenge and a reflection of his complex toward Garrod. Jealousy and hostility toward a boy who effortlessly possesses what they are desperately struggling to obtain—that is the true essence of the conflict between the Frost Brothers and Garrod.

Combat Highlights — From Early Scheming to the Final Battle

Early Arc — The Frost Brothers as Assassins

In the story’s early episodes, the Frost Brothers operate as “pawns” of the Government Reconstruction Committee. The Gundam Virsago and Gundam Ashtaron repeatedly ambush Garrod’s Gundam X.

The Ashtaron’s early combat featured a fighting style alternating between mid-range shooting with the Beam Spear’s crossbow mode and close-quarters brawling with the Atomic Scissors. Surprise attacks—high-speed approach in MA mode followed by transformation to MS mode—troubled Garrod on multiple occasions.

Mid Arc — Escalating Revenge

As the story progresses, the Frost Brothers’ actions increasingly exceed the Reconstruction Committee’s directives. Their objective escalates from “fighting for the committee” to “destroying the world.”

During this period, the Ashtaron sees increased engagement with the Gundam X Divider. Against the X Divider, which had lost the Satellite Cannon, the Ashtaron leveraged the mobility advantage of its MA mode in combat.

Final Arc — The Twin Satellite Cannon Unleashed

In the story’s climax, the Frost Brothers finally deploy the Twin Satellite Cannon. The Virsago’s and Ashtaron’s Satellite Systems link, receiving microwaves from the moon. The two machines assume their combination formation and engage in an artillery duel matching the Gundam Double X’s Twin Satellite Cannon.

This final battle—Garrod’s Double X versus the Frost Brothers’ Virsago and Ashtaron—stands as the climactic confrontation of After War Gundam X.

Variations — The Ashtaron’s Evolution and Its Brother Unit

Ashtaron Series and Related Units

Gundam Ashtaron Hermit Crab — The Forbidden Enhancement

The Gundam Ashtaron Hermit Crab (NRX-0015-HC) is the Ashtaron’s enhanced modification. “Hermit Crab” is exactly what it sounds like—the unit features a backpack larger than the MS body itself, creating a bold design where the machine appears to “carry a shell.”

This massive backpack houses additional thrust sources and weaponry, pushing the Ashtaron’s original concept of “power-type transformable MS” to even more extreme levels. In MA mode, the backpack deploys to envelop the entire machine, creating an appearance that truly resembles a hermit crab’s shell.

Modified simultaneously with the Virsago’s Chest Break (NRX-0013-CB), it represents the Frost Brothers’ machines evolving into their “final forms” for the story’s climax.

Comparison with Brother Unit Gundam Virsago

As this comparison shows, the Ashtaron is the machine that “defends, carries, and closes in,” while the Virsago is the machine that “fires and suppresses.” Their division of roles directly reflects the brothers’ relationship—the younger brother supports the elder, and the elder guides the younger.

Design Secrets — “We Won’t Merchandise It, So Draw Whatever You Want”

Junya Ishigaki’s Uninhibited Initial Design

The Gundam Ashtaron’s design comes with a fascinating behind-the-scenes story. Junya Ishigaki, who handled the initial design, received an order from the production staff: “We won’t merchandise this, so draw whatever you want.”

This freedom from merchandising considerations directly enabled the Ashtaron’s exotic design—the massive Atomic Scissors, the large-scale MA transformation mechanism, and later the Hermit Crab’s outrageously oversized backpack. Because there were no design constraints imposed by Gunpla commercialization, such bold shapes became possible.

However, Ishigaki’s initial drafts were so extreme in their modifications that they were rejected once. The final design was revised to align more closely with main designer Kunio Okawara’s art, resulting in its current form.

The Unity of “Demon” Naming and Form

The unit name “Ashtaron” derives from “Astaroth,” one of Solomon’s 72 Demons. The brother unit Virsago’s name also comes from Solomon’s 72 Demons (Vassago), giving the Frost Brothers’ machines unified nomenclature as “demonic brother units.”

This “demonic” imagery is carried through in the design as well. The Atomic Scissors’ menacing claws evoke a demon’s talons, the mono-eye in MA mode suggests an evil eye, and the massive wings recall a demon’s wings—unit name and form unite to express “a Gundam standing at the opposite pole from justice.”

The Difficulty of Model Kit Production

The production-era policy of “we won’t merchandise it, so draw whatever you want” had significant repercussions for subsequent Gunpla development. The Ashtaron—particularly the Hermit Crab’s massive backpack—proved structurally challenging to render at 1/144 scale, and for many years virtually no official kits existed.

Ironically, this status as “the only in-series Gundam that was never properly modeled” has actually heightened the Ashtaron’s presence among fans.

Cultural Impact — Redefining the Appeal of “Enemy Gundams”

The Frost Brothers’ Popularity

While numerous “enemy Gundam pilots” exist throughout the franchise, the Frost Brothers’ style—”two brothers teaming up to corner the protagonist”—is exceptionally unique.

The concept of the Ashtaron and Virsago as “a pair functioning as one combat force” influenced enemy mobile suit design in later Gundam series. An enemy strong through “coordination” rather than being a singular powerful foe—this concept is a significant legacy of the Frost Brothers.

The Lineage of “Transforming Gundams”

The Gundam franchise features numerous units with transformation mechanisms, but the Ashtaron’s transformation possesses a uniqueness that transcends typical “fighter jet” or “mobile armor” categories. The powerful transformation of a massive frame directly becoming a flight unit represents an approach different from the Zeta Gundam or Wing Gundam, broadening the variety of transforming Gundams.

Reception in Video Games

In the Super Robot Wars series, the Frost Brothers frequently appear with the Twin Satellite Cannon implemented as a “combination attack” between Shagia and Olba, giving them outstanding presence as enemy units. In games where they become usable as player units, the Ashtaron’s high movement range in MA mode and the Atomic Scissors’ melee performance are well-regarded, surprising fans with unexpectedly good playability.

The “Hermit Crab” Shock

The Hermit Crab form’s “backpack bigger than the MS itself” has been a topic of conversation in fan communities for years. The impact of “a Gundam whose equipment is larger than its body” is powerful, earning it the affectionate nickname “Hermit Crab Gundam.” This outrageous design is sometimes cited among mecha designers as an example of “what becomes possible when merchandising is taken off the table.”

Gunpla Guide — The Long-Awaited Ashtaron in Three Dimensions

Representative Kits

1/144 Vintage Kit Gundam Ashtaron

The 1/144 kit released during the original broadcast faithfully reproduces the Ashtaron’s basic form. It features an opening/closing gimmick for the Atomic Scissors and includes the Beam Spear. However, full transformation to MA mode is not supported, and proportions appear dated by modern standards.

Even so, it remained the only option for building an Ashtaron as an official kit for many years. It circulates at relatively accessible prices on the secondary market.

Choosing the Right Kit

• Want a finished product → The MS Ensemble version is compact and display-friendly
• Want to enjoy building → Obtain the vintage 1/144 kit. Also popular as a customization base
• Want the Hermit Crab → The MS Ensemble version is currently the only official three-dimensional rendition

As of March 2026, no HG (High Grade) or MG (Master Grade) Ashtaron has been released. As HG development continues for the After War Gundam X series, fan requests are numerous, and hopes for future commercialization remain strong. An HGAW Ashtaron and Hermit Crab release, in particular, would be a dream come true for series fans.

Related Articles

• Gundam Virsago Complete Guide — Brother Shagia’s unit, with Ashtaron coordination tactics explained
• Gundam Virsago Chest Break Complete Guide — The Virsago’s enhanced modification
• Gundam X Divider Complete Guide — The Ashtaron’s rival and Garrod’s mid-series machine
• Gundam Double X Complete Guide — The Frost Brothers’ greatest nemesis
• After War Gundam X Complete Guide — Full series world-building and story breakdown

Sources and References

• After War Gundam X TV Series (1996, TV Asahi Network)
• After War Gundam X Official Design Archives
• Gundam Channel Official Site — NRX-0015 Gundam Ashtaron
• GUNDAM.INFO — NRX-0015 Gundam Ashtaron
• Pixiv Encyclopedia — Gundam Ashtaron
• Super Robot Wars Wiki — Gundam Ashtaron
• Junya Ishigaki Design Works
• Kunio Okawara Mechanical Design Works