Guilliman

Biodata

Feature	Value
Name	Roboute Guilliman
Original Name	基利曼
Species/Race	Primarch; one of the Emperor’s twenty creations 13 32
Gender	Male
Affiliation	Imperium of Man; Ultramarines 85 86 185
Occupation/Role	Gene-father of the Ultramarines; leader of Terra’s government; military commander and reformer 86 103 185
Status	Sacrifices himself alongside the other Primarchs to restore the Emperor’s discarded humanity 249
First Appearance	First mentioned through a letter to Horus 17; directly depicted in stasis 65

Background / History

Guilliman learned political and conversational skills from his adoptive father, an Archon. After his resurrection, he uses those lessons to question his sons tactfully and obtain a detailed account of the modern Imperium 86.

His laws and policies established the foundations of Ultramar’s prosperity. Ten thousand years later, Bona finds Macragge supported by vigorous trade, impressive architecture, and healthier living conditions than those common elsewhere in the Imperium. These observations give Bona a deep respect for Guilliman’s governance 65.

During the Horus Heresy, Guilliman established Imperium Secundus, a temporary empire formed when Terra became unreachable. Records preserved in the Fortress of Hera document the decision. Bona regards it as a reasonable emergency measure, while recognizing that modern religious authorities could interpret it as heresy 66.

Guilliman also promulgated the Codex Astartes to prevent the Legions from starting another civilization-threatening civil war. Its introduction met resistance, including opposition within the Imperial Fists. By the modern era, the resulting division of Astartes forces makes them easier for Horus and Bona to confront separately 30 102.

For approximately ten thousand years, Guilliman remains immobilized in stasis within the Fortress of Hera, bearing a severe Chaos-tainted throat wound. Bona considers healing him with his blood but declines, fearing that Nurgle could exploit the intervention to corrupt him 32 65.

Appearance

• Towering stature: His height makes an ordinary Rhino transport so cramped that he can only stand upright after leaving it 164.
• Commanding presence: At his awakening, his imposing figure and noble bearing briefly stop everyone around him from fighting 85.
• Battle-worn appearance: Magnus’s assault damages his Armour of Fate and scorches part of his hair 92.
• Idealized likeness: Bona’s deception presents Yvraine with a handsome, muscular Guilliman wearing a classical white robe and green laurel wreath, with golden hair and blue eyes. This is a manufactured portrayal rather than an independent description of his actual appearance 42 43.

Personality

Guilliman is a pragmatic administrator who understands that successful reform requires more than technical superiority. When Cawl declares the Primaris ready, Guilliman anticipates opposition from conservative Chapters and institutions, as well as delays caused by the Imperium’s fragmented command structure 103.

His sense of responsibility also makes him vulnerable to guilt. Kairos attacks him with visions of his father’s condemnation, Dorn’s accusations, Ultramar’s destruction, and Terra’s annihilation. Although these illusions temporarily overwhelm him, Guilliman ultimately awakens and resumes resistance 89.

He increasingly questions the treatment of Astartes as weapons rather than people. When Cawl describes restored empathy as a loss of combat efficiency, Guilliman argues that the modifications are intended to dismantle Astartes supremacy and reconnect Space Marines with mortal humanity 103.

His concern for humanity eventually outweighs obedience to the Emperor. After victory over Chaos, he openly opposes an order for another war against his brothers, arguing that humanity needs unity instead of renewed civil conflict 244.

Abilities & Skills

Governance and Administration

• Establishes laws and policies that continue supporting Ultramar’s prosperity after ten thousand years 65.
• Leads Terra’s government while managing extensive military and administrative demands 102 185.
• Handles internal affairs while Lion El’Jonson commands their campaign, maintaining a clear division of responsibilities 189.
• Recognizes institutional resistance as a major obstacle to deploying the Primaris Space Marines 103.

Strategy and Military Reform

• Prepares the Indomitus Crusade to break the Black Legion’s blockade and revive the Imperium’s failing defenses 102.
• Mobilizes a later army exceeding the Indomitus Crusade in scale, summoning nearly half the Imperium’s Astartes—including every First Founding Chapter—alongside Mechanicus, Astra Militarum, and naval forces 185.
• Revises rigid Space Marine arrangements to exploit Mark X Power Armour’s modular weapon options, allowing armaments to be selected for battlefield circumstances 185.
• Provides Lion with intelligence on Horus’s offensive and Thunderhawk troop movements toward the Eye of Terror 209.

Primarch Combat Prowess

• Kills a charging Khorne warrior with the Emperor’s Sword before nearby Aeldari warriors can clearly follow the movement 85.
• Cuts through Chaos attackers aboard the Macragge’s Honour and wounds Kairos with the Hand of Dominion 89.
• Cooperates with Horus against Magnus, although the empowered sorcerer overwhelms both brothers 91 92.
• Shields the wounded Lion and Sanguinius during the confrontation with Bonebreaka 196.
• Limits: Combined daemonic sorcery immobilizes him in the Maelstrom, and Bonebreaka outmatches the assembled Primarchs in direct combat 89 196.

Leadership and Resolve

• His orders sustain the expeditionary fleet’s morale as Warp corruption drives personnel toward madness 89.
• Breaks free of Kairos’s guilt-driven illusion after being brought close to surrender 89.
• Uses skills learned from his adoptive father to build rapport with his sons and draw out information 86.
• Accepts an escape route offered by Horus despite his distrust, prioritizing the urgent needs of the wider Imperium 90.

Equipment / Weapons / Items

• Emperor’s Sword — A blazing blade wielded immediately after his resurrection. Horus later uses it to sever Guilliman’s psychic restraints before returning it 85 90.
• Hand of Dominion — Used to fire on Kairos, tearing away substantial portions of the daemon’s flesh 89.
• Armour of Fate — His armor during the battle against Magnus; damaged badly enough to leak gas 92.
• Macragge’s Honour — His flagship during the journey toward Terra. It is boarded by Kairos’s forces and left behind during Guilliman’s escape; Huron later arranges its return through indirect means 89 90 201.

Relationships

• The Emperor — Father and sovereign. Guilliman seeks guidance on saving humanity, receives a warning about Bona, and later refuses the Emperor’s demand for another fratricidal war. He ultimately joins the sacrifice intended to restore his father’s humanity 93 244 249.
• Bona Plena — An admirer of Guilliman’s governance, but also the architect of covert attempts to influence his feelings toward Yvraine. Bona later stays behind against Skarbrand so Guilliman can continue his mission 65 66 90.
• Horus Lupercal — Brother, rival, and uneasy ally. Horus challenges his fitness to rule but rescues him from Kairos; the two cooperate against Magnus despite their mutual suspicion 89 90 91.
• Yvraine — The intended partner in Slaanesh’s matchmaking bargain. Bona manipulates both sides of the prospective relationship; Guilliman later feels a stir of affection when recalling her. Aeldari call him “Yvraine’s mon-keigh boyfriend,” but the provided events do not establish an openly acknowledged relationship 31 42 65 66 88 189.
• Belisarius Cawl — Scientific collaborator entrusted with developing stronger military resources. Guilliman inspects his Primaris project, challenges his interpretation of Astartes empathy, and offers support for repairing the Golden Throne 103 186.
• Rogal Dorn — Brother whose return brings Guilliman urgently needed support. Guilliman greets him warmly and hears the explanation for his long self-imposed exile 102.
• Lion El’Jonson — Brother and campaign partner. Lion directs military operations while Guilliman handles internal affairs; both later oppose the Emperor’s order for renewed civil war 189 244.
• Calgar, Agemman, Sicarius, and Tigurius — Senior Ultramarines who brief him after his return. Calgar meets him privately, while Sicarius and Agemman provide close protection 86 164.
• Celestine — Companion on the expedition to Terra. She attempts to rescue him from Kairos and later arrives with reinforcements during the confrontation with Bonebreaka 88 89 196.
• Vulkan — Brother who shields Guilliman when the Emperor attacks him for opposing another civil war 244.

Story Role / Major Arcs

Covert Manipulation and Resurrection

• Slaanesh bargains with Bona to make Guilliman and Yvraine fall in love. Bona initially agrees without realizing that Guilliman is a Primarch immobilized in stasis 31 32.
• Bona sends Teresa, disguised as Yvraine, into soul-to-soul contact with Guilliman. He also constructs a vision in which Yvraine’s forces help him resist Chaos, tailoring the deception to his rational outlook 65 66.
• Cawl and Yvraine agree on a resurrection procedure: her sword must sever the wounded Primarch’s connection to the world and free him from corruption, after which Cawl’s prepared “treasure” can restore him 83.
• Guilliman awakens confused, believing he has just been fighting Horus during the Siege of Terra. He immediately kills a charging Khorne warrior, then receives a comprehensive briefing from the Ultramarines 85 86.

Expedition to Terra

• Guilliman sets out for Terra to take charge of the endangered Imperium and avert another Age of Endless Night 88.
• In the Maelstrom, Red Corsairs attack his fleet while Kairos boards his flagship and traps him in visions of betrayal and catastrophe 89.
• Horus frees him, and Bona urges him onward rather than allowing burning worlds to suffer further delay. Guilliman escapes while Bona remains to confront Skarbrand 90.
• On Luna, he reluctantly joins Horus against Magnus. The brothers are badly outmatched, and Guilliman subsequently questions the dying Voldus about the mysterious intervention that ended the confrontation 91 92 93.
• In the Throne Room, the Emperor overwhelms him with telepathic voices, visions, and knowledge. Guilliman asks how to save humanity and is warned that Bona must not meet the Emperor before the “final moment” 93.

Imperial Reconstruction and Renewed Campaigns

• Guilliman struggles with the High Lords, who treat his authority as a greater immediate threat than Abaddon. He prepares the Indomitus Crusade amid their political obstruction 102.
• He reviews the Primaris project and studies the altered Luna Wolves, recognizing an attempt to restore emotional humanity to Astartes 103.
• Cawl warns him that the Golden Throne is spiraling out of control and could explode into a Warp rift larger than the Eye of Terror. Guilliman commits to securing whatever support repairs require 186.
• During the renewed Ork conflict, he supports Lion’s command and joins the confrontation with Bonebreaka alongside Lion, Sanguinius, and a giant wolf 189 195 196.
• In the offensive against Chaos, his report records limited damage from the Plague Fleet but severe losses to Nurgle’s infection. His Imperial Fleet secures an Eidolon foothold and awaits reinforcements 219.

Defiance and Final Sacrifice

• After Chaos’s defeat, Guilliman rejects the Emperor’s command to conquer Imperium Nihilus and kill the rebellious Primarchs. The Emperor attacks him, and Vulkan intervenes 244.
• During the catastrophe over Terra, Guilliman joins the Primarchs’ collective sacrifice to return the portions of humanity their father discarded when creating them 249.
• After the Dark King’s destruction, the Emperor names Macragge and Cabalide as examples for Terra’s future government, preserving Guilliman’s administrative legacy in the new order 250.

Notable Quotes

“You will not... defeat me!”
— Resisting Kairos aboard the Macragge’s Honour 89

“You are looking at them as ‘weapons of war,’ which is why you consider it inefficient.”
— Challenging Cawl’s assessment of restored Astartes empathy 103

“He wants to eliminate ‘Astartes supremacy.’”
— Identifying the purpose behind the Luna Wolves’ emotional modifications 103