Xi Gundam Complete Guide— The Shock of Minovsky Flight Explained【Hathaway's Flash】

A Gundam That Flies the Sky — What Is the Xi (Ξ) Gundam?

Mobile Suits were originally weapons born for combat in space. Their use on Earth was always an "application," and the idea of freely flying through the sky was never part of their design. Riding a sub-flight system, descending via ballute, or at most making short thruster jumps — that was the limit of Mobile Suit "flight" in the Universal Century.

But in UC 0105, a unit appeared that shattered that common wisdom. The RX-105 Xi (Ξ) Gundam. Equipped with an internally integrated Minovsky Flight Unit, it soars freely through the atmosphere without relying on propellant — the first Gundam in Mobile Suit history that can truly fly.

The pilot is Hathaway Noa. The son of the legendary Bright Noa, and the leader of the anti-Earth Federation organization "Mafty Navue Erin." More than a decade after his father fought as a hero of the Federation, the son now stands on the side raising a rebellion against it.

The Xi Gundam is not simply a "powerful Mobile Suit." It is a unit carrying the rage and ideals of a single young man directed against a corrupt Earth Federation government. And the story — written as a novel by Yoshiyuki Tomino in 1989 — was adapted as a theatrical anime from 2021 after more than 30 years, stirring the hearts of a new generation of fans.

This article covers everything about the Xi Gundam: its specs, armaments, pilot, development background, design secrets, and Gunpla information.

Basic Specifications — The Cutting Edge of UC 0105

Unit Overview

What the Specs Tell Us

The first thing that stands out is the massive head height of 26.0m. Considering that the original Gundam (RX-78-2) stands at 18.0m and the Nu Gundam (RX-93) at 22.0m, the Xi Gundam far exceeds them in size. The primary reason for this enlargement was the space needed to internally house the Minovsky Flight Unit.

The generator output of 3,980kW represents roughly a 33% improvement over the Nu Gundam's 2,980kW. The total thruster output of 160,000kg is approximately 1.6 times the Nu Gundam's 97,800kg. The base weight of 32.0t is only slightly heavier than the Nu Gundam's 27.9t, but the full equipment weight of 80.0t is a large jump from 63.0t — largely attributed to equipment related to the Minovsky Flight Unit.

Worth particular attention is the thrust-to-weight ratio. With 160,000kg of thrust against a full equipment weight of 80t, the ratio is 2.0 — far exceeding the Nu Gundam's approximately 1.55, and this figure underpins the Xi Gundam's extraordinary maneuverability.

Development Background — A 5th-Generation MS Inheriting the Nu Gundam's Lineage

Anaheim's Gundam Development History and the Greek Letter Lineage

The Gundam-type Mobile Suits developed by Anaheim Electronics follow a lineage of Greek letters.

In the Greek alphabet order, "Ξ (Xi)" comes right after "ν (Nu)." This positions the Xi Gundam as the "legitimate successor" to the Nu Gundam — the last unit piloted by Amuro Ray. The Xi Gundam was born in the wake of what the Nu Gundam achieved at the Axis Shock.

What Is a 5th-Generation Mobile Suit?

Mobile Suits of the Universal Century are classified by generation, and the Xi Gundam is classified as a 5th-generation MS. The defining characteristic of the 5th generation is the practical implementation of Minovsky Flight (a Mobile Suit-mounted version of the Minovsky Craft).

Originally, the Minovsky Craft was a technology that allowed large warships like the White Base to hover under gravity. The enormous equipment required made miniaturization to Mobile Suit scale long considered impossible. But entering the UC 0100s, miniaturization finally achieved a level compatible with MS installation. The result was two 5th-generation Mobile Suits: Penelope and the Xi Gundam.

The Relationship with Penelope — Sister Unit and Sworn Enemy

Understanding the Xi Gundam requires understanding its relationship with the rival unit Penelope (RX-104FF).

The critical difference is the method of implementing Minovsky Flight. The Penelope achieves Minovsky Flight by attaching a "Fixed Flight (FF) Unit" externally to its base unit, the Odysseus Gundam (RX-104). Removing the FF unit returns it to a standard MS.

In contrast, the Xi Gundam has the Minovsky Flight Unit integrated into the unit's very structure. It does not rely on any external add-on equipment — Minovsky Flight is possible in its bare form. This represents a design that is one generation ahead of the Penelope technologically.

Developed after the Penelope and refined using its operational data, the Xi Gundam is in a sense the "completed 5th-generation MS."

The Story Behind the Secret Commission

The development of the Xi Gundam involves complex political background.

On the surface, Anaheim Electronics is a "legitimate defense contractor" delivering the Penelope to the Earth Federation Forces. However, simultaneously, it secretly accepted a commission from the anti-Federation organization Mafty and supplied them with the Xi Gundam as well.

In other words, Anaheim sold Gundams to both sides. This is a standard Anaheim practice going back to the Gryps Conflict — its nature as a "merchant of death" is plainly on display here. The Penelope and Xi Gundam are sister units born from the same company, and the irony of those sisters clashing on the battlefield gives the story of "Hathaway's Flash" deeper resonance.

Armaments — The Heavy Arsenal of a Flying MS

The Xi Gundam is a unit built on the premise of supersonic flight in the atmosphere, and its armament system is designed with "fighting while flying" in mind.

Beam Rifle

The Xi Gundam's Beam Rifle features a remarkable beam initial velocity twice that of conventional MS Beam Rifles. When firing at supersonic speeds, normal initial velocity causes beam attenuation and reduced accuracy, making this high-velocity enhancement essential for aerial combat.

In the story, it is used in clever tactical ways by Hathaway — such as firing it just above the ocean surface as a decoy, or deliberately overcharging a malfunctioning one to cause an explosion as a distraction.

Beam Sabers ×2

Two sabers are mounted on the backpack. Notably, they can form beam blades without being held in the hands. The beam blades can be activated from their base-mounted position, theoretically allowing ramming attacks at supersonic flight speeds. In the theatrical version, the beam blades are depicted in green.

Funnel Missiles ×10

The Xi Gundam's trump card. Conventional missiles lose their radar guidance under Minovsky particle dispersion and can only fly in a straight line. However, Funnel Missiles are guided by psycommu (the pilot's brainwaves), allowing trajectory changes and tracking without being affected by Minovsky particles.

They are a conceptual evolution of the Nu Gundam's Fin Funnels (wireless beam gun platforms), but with a critical difference: they are disposable. While Fin Funnels can be reused as long as energy lasts, a Funnel Missile is finished upon impact. In exchange, the explosive force and momentum of a missile are added, enabling saturation attacks impossible with standard funnels.

A memorable scene in the novel version is the first use of Funnel Missiles in the final battle against Penelope's funnels. Hathaway fires a barrage of Funnel Missiles, and uses the explosion smoke from intercepted missiles to obstruct the enemy's line of sight — demonstrating tactical ingenuity beyond pure weapon use.

Missile Launchers (Built-in)

Three missiles are built into each elbow of both arms and each knee of both legs, for a total of 12. They lack the guidance performance of the Funnel Missiles, but provide valuable firepower that can lay down fire in all directions while flying. The sight of a 26m giant scattering large quantities of missiles while approaching at supersonic speed is more like a "flying fortress" than a Mobile Suit.

Shoulder Mega Particle Cannons ×2

An armament added in the theatrical version that does not appear in the original novel. One cannon is built into each front shoulder armor plate, and the distinctive action of flipping the shoulder armor up before firing is a notable feature. Having two high-output mega particle cannons built in means the Xi Gundam can maintain strong ranged combat capability even without its Beam Rifle.

Shield (with Built-in Beam Cannon)

Additional armor and weaponry mounted on the left arm. Equipped with a Beam Cannon at its tip, it can simultaneously handle defense and offense.

Beam Barrier

Strictly speaking this is not a "weapon," but it is an indispensable piece of equipment when discussing the Xi Gundam's combat capability. It deploys a film of beams across the unit's surface to protect it from air resistance.

This Beam Barrier is why a Mobile Suit — a shape that "shouldn't be able to fly" aerodynamically — can achieve supersonic flight. Cutting through the wall of air with beams — it is a uniquely Universal Century technology that breaks through the laws of physics using Minovsky physics.

The Penelope also carries a Beam Barrier, but the Xi Gundam's is considered a more advanced iteration with improved deployment efficiency.

The Pilot — Hathaway Noa and the Battle of Mafty

Hathaway Noa — Bright's Son, Mafty's Leader

Hathaway Noa is a young man bearing a name deeply engraved in Universal Century history. His father Bright Noa fought on the Federation frontlines from the One Year War through Char's Counterattack as a hero. His mother Mirai Yashima also fought the One Year War as the helmsman of the White Base.

Having grown up alongside war from childhood, Hathaway became entangled in the Second Neo Zeon War (Char's Counterattack) at age 13. In the chaos, he developed feelings for the Enhanced Human girl Quess Paraya, but the beam he fired to "save" her took her life instead. — This painful experience defined the rest of Hathaway's life.

Mafty Navue Erin — The Name of a Resistance Movement

In the UC 0100s, the Earth Federation government was severely corrupt. Only the privileged class held the right to live on Earth, while ordinary citizens were herded into space colonies. "The human race is bound to the Earth's gravity" — the ideal Char Aznable had championed remained unresolved after his death, and had in fact worsened.

Hathaway, calling himself "Mafty Navue Erin" (meaning "the one who delivers the divine punishment of justice" in Arabic), led an organization conducting armed actions — "purges" — against the Federation's corrupt officials. His public face was a young botanist traveling the Earth. His hidden face was a terrorist riding a Gundam to challenge the Federation.

"I'd like you to remember that it is possible to kill someone with words. This is not a metaphor."

This line of Hathaway's demonstrates that he is not simply a violent terrorist — he is someone who deeply understands the power of words and the true nature of violence.

Hathaway and the Xi Gundam — The Relationship Between Pilot and Machine

Just as the Nu Gundam was the unit that supported Amuro Ray's "final battle," the Xi Gundam is the unit that symbolizes Hathaway's "only battle."

What is interesting is Hathaway's capability as a pilot. He is a Newtype (or possesses its latent qualities) and can operate Funnel Missiles as psycommu weapons. However, he is not a battle-hardened super ace like Amuro or Char. Hathaway is a pilot with "Newtype ability but limited combat experience."

Even so, the combination of the Xi Gundam's overwhelming performance and Hathaway's determination allows him to more than hold his own against the Federation's ace unit Penelope. A powerful machine can compensate for a pilot's weaknesses — but the reverse is equally true, and ultimately, a situation beyond what machine performance alone can overcome awaits Hathaway.

Gigi Andalucia and Kenneth Sleg — Xi Gundam in a Love Triangle

The story of "Hathaway's Flash" is built not only on MS battles, but on the relationship between Hathaway, Gigi Andalucia, and Kenneth Sleg as a crucial axis.

Gigi Andalucia is a mysterious young woman who intuitively sees through Hathaway's identity as Mafty. As the companion of a senior Federation official, she resonates with — or perhaps toys with — Hathaway's ideals.

Kenneth Sleg is the commander of the Circe Unit assembled to hunt down Mafty. A former front-line pilot and capable military officer. Though enemies, he and Hathaway share a complex relationship of mutual respect and goodwill.

The Xi Gundam is the embodiment of Hathaway's "Mafty" face within this triangle. When Hathaway boards the Xi Gundam, he stands on the battlefield not as "Bright's son" or "Gigi's love interest," but as "Mafty Navue Erin."

Combat in the Story — Supersonic Battlefields

The First Battle Above Davao

The Xi Gundam's appearance in the story begins with its handover scene in Davao, Philippines. Hathaway boards the Xi Gundam for the first time after Mafty secures it through secret channels.

The first engagement is a clash with the Federation Forces. Above Davao at night, the Xi Gundam makes its debut display of flying capability. The Minovsky Flight Unit activates, and the 26m giant rises not on thruster exhaust flames, but on the power of Minovsky particles. That sight completely overturns the conventional concept of a Mobile Suit.

The Shock of Urban Combat

The most shocking battle scene in the first theatrical film is the battle over the city of Davao. Standing in the Xi Gundam's way is Penelope. Two 5th-generation Mobile Suits wage supersonic combat above an urban area.

Sonic booms shatter the windows of buildings to pieces; the shadows of massive MS figures blanket the streets. Residents flee in panic, and infrastructure is devastated. When the Xi Gundam of "terrorist" Mafty and the Penelope of the "government army" Circe Unit clash, it is always ordinary civilians who bear the cost — and this brutal depiction is the very heart of "Hathaway's Flash."

"It'll work out somehow."

Hathaway says these words to himself in the Xi Gundam's cockpit during a difficult operation. An unyielding resolve and a somehow optimistic ring. Is it his Newtype intuition telling him so, or is it bravado to steel himself? This line, open to either interpretation, distills the appeal of Hathaway as a character.

Xi Gundam vs Penelope — The Battle in the Sky

At the story's climax, the Xi Gundam and Penelope face their final showdown.

In this battle, Hathaway uses Funnel Missiles for the first time. He fires a barrage of Funnel Missiles to counter Penelope's funnels (in the original version, funnel-equipped), and uses the smoke from intercepted missiles to obstruct the enemy's field of vision — a scene that showcases Hathaway's tactical ingenuity.

The aerial dogfight where two Gundams cross at supersonic speeds and lock beam sabers is praised as a highlight scene that the mechanical design team worked to perfect.

The Ending — Xi Gundam's Fate (Novel Version)

※The following contains major spoilers regarding the ending of the novel version.

In the novel version, the Xi Gundam is ultimately captured by the Federation Forces. Hathaway is also taken prisoner, and it is revealed that the identity of Mafty is "the son of Bright Noa."

Due to the vindictive emotions of Federation officials, Hathaway is executed by firing squad without trial. And the most cruel detail is that the one said to have "carried out" the execution was Hathaway's own father, Bright Noa. Kenneth Sleg installs the unknowing Bright as the next unit commander, and Bright only learns of his son's execution and his own name in the report by reading a newspaper — this tragedy stands as one of the heaviest endings in all Universal Century stories.

The Xi Gundam fell silent along with its pilot's ideals. But the philosophy Hathaway risked his life to argue — "humanity must leave the Earth" — is carried forward into the eras of F91 and V Gundam.

Technical Explanation of Minovsky Flight — Why Can the Xi Gundam Fly?

The Difference from Minovsky Craft

The Minovsky Craft and Minovsky Flight are different technologies based on the same principles.

The Minovsky Craft uses the repulsive force of Minovsky particles to hover under gravity. The White Base of the One Year War era is the representative example. However, this technology requires enormous equipment and could only be installed in battleship-class hulls.

Minovsky Flight is a developed and miniaturized form of the Minovsky Craft, made compatible with Mobile Suit installation. It functions not merely as "hovering," but as an active "flight" — a propulsion system capable of directional control and acceleration.

Why Can It Fly at Supersonic Speeds?

A Mobile Suit is a humanoid weapon. Given air resistance, a unit of that shape should not be capable of supersonic flight. This is where the Beam Barrier plays a crucial role.

The Xi Gundam deploys a film of beams across its surface and flies as if "slicing through" the wall of air. The Beam Barrier dramatically reduces friction with air, making it possible to exceed the speed of sound even in the aerodynamically disadvantaged humanoid shape.

Transformation into Flight Form

The Xi Gundam transforms into "Flight Form" during flight.

• Shoulder armor (Minovsky Flight Units) deploy
• Stabilizers on the backpack extend rearward
• Blade-shaped parts on the shins transform

This transformation improves aerodynamic characteristics and enables more efficient flight. However, rather than transforming from humanoid into a completely different form, it is closer to "an adjustment toward a flight-suited posture." Unlike the Zeta Gundam's Wave Rider complete transformation, the Xi Gundam maintains the concept of "flying in humanoid form."

Design Secrets — The Unusual Unit That Sought to Transcend "Gundam"

Yasuhiro Moriki's Original Design (1989)

The original mechanical design of the Xi Gundam was created by Yasuhiro Moriki. The Xi Gundam drawn in 1989 as illustration for the novel version was a design that greatly departed from the Gundam conventions of the time.

Moriki later said:

"I didn't think it would become a theatrical film 30 years later, so I didn't think about making it move. I was drawing it with the vibe of 'the most powerful Gundam.'"

Because it was an illustration job with no expectation of anime adaptation, he was freed from the constraint of "making it move," allowing a free design approach.

The order was surprisingly simple: "Fly through the sky with a Minovsky Craft" and "launch Funnel Missiles" — that was all. From these minimal conditions, Moriki drew the "most powerful Gundam in my own style."

The Design Philosophy of Transcending "Gundam"

The most distinctive aspect of the Xi Gundam's design is that it does not have the conventional "Gundam face."

The twin-eye design, V-fin antenna, and tricolor of white, blue, and red — the icons that have made Gundams "Gundam" through generations since the original — are boldly altered in the Xi Gundam. The head is small, the chest is white-based, and the overall silhouette resembles a giant winged monster. Moriki himself has stated he consciously envisioned a "monster" or "final boss" image in the design.

This "transcend Gundam" approach also aligns with the Xi Gundam's narrative meaning. Hathaway denies the Federation's "justice" and rides a Gundam as a terrorist. That his Gundam does not carry the face of a conventional "hero of justice" Gundam is, in a sense, entirely fitting.

Hajime Katoki's Theatrical Version Refinement (2021)

For the 2021 theatrical release, Hajime Katoki refined the Xi Gundam's design.

Katoki respected Moriki's original concept while making adjustments with "making it move" in CG animation as the premise. Notable changes include:

• Color scheme finalization: Based on Moriki's white Xi Gundam illustration published in Newtype magazine, a white-based color scheme was adopted
• Addition of shoulder mega particle cannons: New armament absent in the original novel
• Detailing refinement: Design cleanup in preparation for plastic model development
• Beam Saber emission color: Changed from the pink of game versions to green

When Moriki saw the refined Xi Gundam moving in the film, he is said to have been astonished: "I'm amazed they made it move this well, given it wasn't designed with movement in mind."

Cultural Impact — An Awakening 30 Years in the Making

The "Known Only to Core Fans" Status During the Novel Era

The Xi Gundam first appeared in the 1989 novel, but because it remained unfilmed for so long, it occupied a position within the Gundam fan community of "a unit only core fans know." Its recognition gradually increased through appearances in games like Super Robot Wars, but it remained far from the "national-level recognition" of the Nu Gundam or Zeta Gundam.

The Big Break with the Theatrical Version (2021 Onward)

The 2021 theatrical release of "Mobile Suit Gundam: Hathaway's Flash" was the moment of "awakening" for the Xi Gundam.

The first film's box office revenue recorded 2.23 billion yen, surpassing the all-time record for a Gundam film. And the second film "The Witch of Circe," released in January 2026, surpassed 2.24 billion yen in its first 29 days, becoming an even greater hit than its predecessor.

The visual beauty of the Xi Gundam's battle scenes — particularly the supersonic combat above the city — completely reinvented conventional Gundam battle depictions. Sonic booms, the light of the Beam Barrier, the giant shadow cutting through the night sky. The footage conveyed "a Mobile Suit actually flying" with genuine conviction, stunning audiences everywhere.

The Mafty Syntax and Internet Memes

With the theatrical version's major success, an internet meme known as the "Mafty Syntax" became popular. Posts mimicking lines and scenes from the film spread massively across social media, sparking a kind of cultural wave.

While it may seem like the "meme-ification" of a serious work, it cannot be overlooked that this drew a large number of new fans who became fascinated by the work's deep psychological portrayal. Bandai Spirits even officially utilized the Mafty persona to issue COVID-19 awareness messaging as "a statement from Mafty" — a noted example of official savvy engagement with internet culture.

The "How Do You Read Ξ?" Problem

When discussing the Xi Gundam's cultural recognition, one cannot avoid the problem of "how to read Ξ in the first place." The 14th letter of the Greek alphabet "Ξ" has multiple readings in Japanese — "Kusui," "Kushii," "Guzai," and others — and debate has persisted for years even among Gundam fans.

The theatrical release made "Ksi" widely recognized as the official reading, but even so, the vast majority of first-time viewers cannot read it. The hurdle of "a unit name you can't read" has, conversely, reinforced the brand image of the Xi Gundam as "a special unit known only to those in the know." The fact that Kakaku.com Magazine published a Xi Gundam article with the title "Can You Read This?" speaks to how widespread the "unreadable problem" is.

An Unusual Gundam Where the Protagonist Is a Terrorist

What makes the Xi Gundam culturally distinctive is that its pilot is a terrorist.

Gundam series protagonist units typically follow patterns of "a civilian who gets caught up in events" (Amuro, Kamille, Banagher) or "a member of a regular military unit," and "Hathaway's Flash" stands out as having from the start a leader of a terrorist organization as its protagonist.

This gives the Xi Gundam a unique position. If the Nu Gundam is "the Gundam that saved humanity," the Xi Gundam is "the Gundam that tried and failed to save humanity." It may be the unit that most embodies the Universal Century worldview where the line between justice and evil is blurred.

Gunpla Guide — Acquiring the Xi Gundam

HGUC 1/144 Xi Gundam

Released alongside the theatrical version, this kit faithfully recreates the large MS exceeding 26m at 1/144 scale. It is an unusually large kit for HGUC, with a height of approximately 18cm — roughly 1.5 times the size of a typical HGUC.

Key Features

• MS Form ⇔ Flight Form transformation: The shoulder Minovsky Flight Units, backpack wings, and leg blades all deploy and move to recreate the in-story transformation
• Comprehensive included armaments: Beam Rifle ×1, Beam Sabers ×2, Shield ×1
• Hand parts: Open hands (left and right), grip hands (left and right), rifle grip (right)
• Marking sheet: Foil stickers included

Review Points

The price is high for HGUC (6,600 yen), but the volume and transformation gimmick justify the cost. That said, as a large kit, joint tension can be insufficient in places, so care is needed when posing. Assembly itself is snap-fit with no glue required — just a pair of nippers will get it built.

HGUC 1/144 Xi Gundam VS Penelope Funnel Missile Effect Set

A limited product including both the Xi Gundam and Penelope. Funnel Missile launch effect parts are included, allowing recreation of the in-story confrontation scene.

ROBOT Spirits (Ka signature) RX-105 Xi Gundam

This is a finished action figure rather than a plastic model. It features precise sculptwork supervised by Hajime Katoki and an extensive range of articulation. It is the ideal choice for those who want to display the Xi Gundam but find assembly daunting.

How to Choose

Note: As of March 2026, no MG (Master Grade) or RG (Real Grade) for the Xi Gundam has been released. There is high expectation that an MG will follow the completion of the theatrical trilogy, and "when will the MG come out" is a constant topic among fans.

Variations and Derivatives — The Full Xi Gundam Lineage

RX-104 Odysseus Gundam (The Core of Penelope)

The unit most deeply related to the Xi Gundam is the RX-104 Odysseus Gundam — the "core" of the sworn enemy Penelope.

The Odysseus Gundam is the "senior unit" completed before the Xi Gundam. On its own it is a standard Gundam-type MS, but when equipped with the massive Fixed Flight (FF) Unit it becomes "Penelope" and gains Minovsky Flight capability.

Its name derives from Odysseus of Greek mythology. The FF unit form was named after his wife Penelope, who waited faithfully for his return — a naming sensibility carried over from the novel version.

The model number "RX-104" versus the Xi Gundam's "RX-105" indicates that Penelope was developed and completed first, and the Xi Gundam was completed later after feeding back Penelope's operational data. The structure of "the younger sister surpassing the older sister" symbolizes the evolution of design philosophy.

Comparison: Xi Gundam vs Penelope FF Unit

While Penelope surpasses in raw thrust, the Xi Gundam is superior in its "completed flight capability" — the ability to deploy a Beam Barrier while maintaining MS form. This is the basis for saying "the Xi Gundam is the perfected form created using Penelope's data."

What Succeeded the Xi Gundam

In the era after "Hathaway's Flash" — in "Mobile Suit Gundam F91" set in UC 0123 — MS technology instead progresses toward miniaturization. The Xi Gundam's massive 26m frame is one of the "ultimate forms of large MS," and the F91 generation sees the emergence of ultra-compact MS at just 12.5m.

Minovsky Flight technology itself is carried forward into later eras with further miniaturization and efficiency improvements. The Xi Gundam is inscribed in Universal Century technological history as "the first practical unit" of that technological lineage.

From Nu Gundam to Xi Gundam — The Gundam Lineage

RX-78 → RX-93 → RX-105

Universal Century Gundam-type units have continued to evolve starting from the RX-78 (original Gundam).

The evolution from the Nu Gundam to the Xi Gundam is more than a spec upgrade.

The Nu Gundam pursued "supreme mobility in space." Specialized to draw out Newtype power to the maximum with Fin Funnels and Psycho-Frame. The result was the miracle of the Axis Shock — but atmospheric operation required relying on a sub-flight system.

The Xi Gundam broke through that limit and attained "supreme mobility in the sky." Through Minovsky Flight, it can fight freely both in space and in the atmosphere — truly an all-purpose unit.

Father and Son's Gundams

The pilot of the Nu Gundam was Amuro Ray. The pilot of the Xi Gundam is Hathaway Noa. They are not in a direct mentor-student relationship, but Hathaway had a connection with Amuro in his early years and was on the same battlefield in "Char's Counterattack."

And against the Nu Gundam's outcome of "stopping the fall of Axis," the Xi Gundam arrives at the outcome of "failing to stop the Federation's corruption." Hope from the Nu Gundam versus defeat for the Xi Gundam — this contrast starkly illustrates that Universal Century storytelling is "a repetition of hope and despair."

But even failure is not without meaning. Hathaway's actions influence later eras and become one of the factors moving Universal Century history forward. The Xi Gundam may be "a Gundam that failed," but it is absolutely not "a Gundam that meant nothing."

Related Articles

• Nu Gundam — Complete Mobile Suit Guide: Amuro's final unit, the "previous generation" to the Xi Gundam. Directly connected through the Greek letter lineage.
• Sazabi — Complete Guide: The rival of the Nu Gundam. Char's final unit, and the departure point for the Xi Gundam's generation.
• Char's Counterattack — Complete Series Guide: The prequel to Hathaway's Flash. Where Hathaway's formative experiences are depicted.
• Unicorn Gundam — Complete Guide: The Gundam of UC 0096. Connected to the Xi Gundam through the Psycho-Frame lineage.
• Psycho Gundam — Complete Guide: Another unusual Gundam sharing the characteristic of being "a giant Gundam."
• Zeta Gundam — Complete Guide: Pioneer of the variable MS. The origin of the "flying Gundam" concept of the Xi Gundam.
• Gundam F91 — Complete Series Guide: The era after the Xi Gundam, the story of UC 0123. The dawn of the small MS era.

Sources

• "Mobile Suit Gundam: Hathaway's Flash" novel, 3 volumes, Yoshiyuki Tomino, Kadokawa Sneaker Bunko, 1989–1990
• "Mobile Suit Gundam: Hathaway's Flash" theatrical film Part 1, Sunrise, 2021
• "Mobile Suit Gundam: Hathaway's Flash — The Witch of Circe" theatrical film Part 2, Sunrise, 2026
• "Mobile Suit Gundam: Char's Counterattack" theatrical film, Sunrise, 1988
• Yasuhiro Moriki interview "Xi Gundam Is a 'Post-Gundam' Design," MANTANWEB, 2021
• Yasuhiro Moriki "Drawing the 'most powerful Gundam in my own style' with no anime adaptation in mind," MANTANWEB, 2021
• Seiichi Nakatani interview "The True Nature of the Mobile Suit's 'Monster-Like Presence,'" Da Vinci News, 2021
• Bandai Spirits Hobby Official Website (bandai-hobby.net)
• GUNDAM.INFO (gundam.info)
• Gundam Wiki (gundam.fandom.com)
• Gundam Wiki JP (gundam.wiki.cre.jp)
• pixiv Encyclopedia (dic.pixiv.net)

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