Muller

Muller is the former Sword Saint remembered as humanity's greatest swordsman and one of its foremost heroes. He develops the Matchless Sword inherited from Biban, seals numerous great demons, and deters wars simply through his continued presence, but despair over the world's fate eventually drives him into a dimensional gap. Centuries later, Kraugel finds him alive and helps draw him back to the surface, where Muller fights beside Grid, joins the Overgeared Empire, and turns his experience toward guiding a generation that no longer needs one hero to carry the world alone. (Chapters 1124, 1252, 1709–1710, 1745–1746, 1751–1753, 1755–1757, 1764–1765, and 1794)

Biography

Reidan and the Overgeared Alliance

Muller first enters the supplied record through the history of Cork Island. Hell Gao had ruled the island, consumed its people, and received thousands of human sacrifices before Muller intervened. Muller destroyed the great demon's body so thoroughly that it became ash, ending that immediate reign of terror and leaving the islanders with a story of deliverance. The victory was not a complete eradication: Muller could not seal Hell Gao's soul, allowing the demon to return periodically through new vessels. His accomplishment therefore protected later generations while also defining the unfinished danger that Grid's party eventually inherited. (Chapters 162 and 165)

Hell Gao's own memories establish the scale of the feat more clearly than the island legend. The demon remembers Muller cutting through hellfire, removing limbs with a single strike, and overturning what Hell Gao regarded as the common sense of power. When Grid later survives the demon's attacks and destroys another vessel, Hell Gao recognizes the same tenacity and accepts Grid's claim that the two belong to the same class. Muller is not personally present in this conflict, but his past victory supplies both its standard and its consequence: Grid is measured against the swordsman who first broke Hell Gao, while the imperfect soul seal explains why another generation must fight the demon at all. (Chapters 165 and 167)

Yangbans, Gods, and New Legends

The swordsmanship attributed to Muller is not created in isolation. Biban originates the Matchless Sword and its heart technique, and Muller discovers those traces, respects his predecessor, and develops the inheritance further. Biban regards Muller as the greater natural talent and explains that Muller completed the intertwined development of skill, body, and heart that defines his path as Sword Saint. Muller then leaves his secret techniques behind to protect the world after him. The result is a legacy with two functions: it records his own growth from successor into the strongest swordsman of his age, and it offers future Sword Saints a proven route toward the same integrated power. (Chapters 1124 and 1221)

Muller's public work gives that technical inheritance moral weight. He protects people openly, seals the bodies of multiple great demons, and becomes one of hell's acknowledged human enemies. His influence also extends beyond recorded battles: kingdoms refrain from war and plunder because no ruler wishes to provoke him. Yet the historical record obscures much of that deterrence, and even some demons dismiss saving cities or ordinary people as unremarkable. Muller nevertheless leaves his techniques in places where a worthy successor can find them, including a scroll written after his duel with Mir leaves him with a lingering desire for another contest. His legacy is thus built from protection and unfinished aspiration rather than conquest alone. (Chapters 1252, 1321, and 1745)

Kraugel's response prevents this legacy from becoming mere repetition. The Sword Saint class pressures him to learn Muller's Matchless Heart Technique, warning that continued defeats could damage the class's reputation, while Saleos judges him against Muller's progress. Kraugel refuses the shortest route because becoming a second Muller would defeat his goal of surpassing Muller as himself. He eventually acquires the secret techniques without making them the sole basis of his swordsmanship. Muller's preserved knowledge consequently becomes both support and resistance: it strengthens the next Sword Saint, but the pressure of his name also forces Kraugel to define a distinct path. (Chapters 1254, 1321, and 1376)

Apostles, Dragons, and the Overgeared World

Centuries after Muller's apparent death, other swordsmen continue to argue over what his legacy means. Biban still praises the talent of his former successor even after living long enough to surpass Muller's prime in accumulated technique. He believes that Muller would have remained the strongest had Muller continued to live and train, and he treats Muller's respect for predecessors as a standard for younger swordsmen. At the same time, records say that Muller abandoned his sword and entered seclusion because he wanted to die. This combination of reverence and uncertainty preserves Muller as history's strongest Sword Saint while hiding the despair that ended his public life. (Chapters 1480–1481)

The uncertainty deepens when a demon is given a fabricated soul identified as Muller's. That soul is exposed as synthetic rather than proof of Muller's death, while separate rumors suggest that the true Muller remains alive. Meanwhile, Kraugel believes the No Offspring Tomb is searching for Muller's corpse and considers protecting the supposed grave before it can be exploited. The concern is reasonable but based on a false premise. No verified body exists, the “soul” is an imitation, and the grave functions as part of a ceremony that treats a living man as dead. These clues gradually replace the accepted account of death with a search for Muller's actual whereabouts. (Chapters 1662 and 1680)

Baal, Asgard, and the Complete Ending

Cabelon's appearance makes the survival question immediate. He claims to be Muller's disciple, insists that his master cannot be dead, and reveals that he has worked with the No Offspring Tomb while investigating the grave. His testimony is unreliable in one important respect—Muller later identifies him as a ruins hunter who merely copied his swordsmanship rather than a true student—but the investigation itself exposes the tomb as a sacrificial site protected by a sword-energy barrier. Braham eventually locates Muller through that evidence and the testimony of the God of Regret. Grid sends Kraugel to meet him, judging that the present Sword Saint is the right person to awaken a predecessor who has withdrawn from life. (Chapters 1709–1710, 1712, 1730, and 1832–1833)

Kraugel finds Muller in a dimensional gap and repeatedly challenges him. Muller wins each duel, but the number of exchanges rises as Kraugel adapts, revealing that the younger swordsman's foundation is broader than the Matchless Sword. The pressure damages the dimension and produces monsters, seemingly forcing Muller to return, but Kraugel says the surface no longer depends on him. That answer reaches the source of Muller's withdrawal. Muller had protected people because he regarded great talent as a duty, then learned that death led either to Asgard's service or Baal's distorted hell. Believing the world hopeless and himself unable to change it, he abandoned his burden and hid. Kraugel's assurance that ordinary people and many new heroes can now protect one another finally gives him relief rather than another obligation. (Chapter 1745)

Muller spends more than twenty days teaching Kraugel through combat before sensing a crisis at the No Offspring Tomb through strands of sword energy left there as surveillance. He cuts open a path to the surface and returns voluntarily. The decision is not a complete cure for his fear: he knows the Tomb holds the body of Beriache, remembers fleeing from the Specter's overwhelming power in the past, and expects that confronting the threat may kill him. Even so, he goes because a collapse around the Tomb could break dimensional boundaries and endanger people. His return therefore reverses the choice that sent him into hiding. He accepts fear and possible death rather than allowing the surface to bear the consequence of his absence. (Chapters 1745–1746, 1748–1749, and 1751)

At the Tomb, Muller saves Huroi with Heart Sword, recognizes Grid's achievements through the Hero King's fighting energy, and initially prepares to oppose him when the Specter's proposal appears likely to sacrifice the surface. Grid's actual plan resolves that misunderstanding and supplies Muller with thousands of weapons. Their power temporarily completes Muller's deficient body and energy, allowing his technique to reach an Absolute level against Beriache's body. He then cuts the Tomb itself with Space Sword and supports Grid against the Specter, but Heart Sword exhausts his mind, a direct strike fractures his leg, and protecting Grid leaves him mortally wounded. Muller still refuses escape and offers to become the treasured sword that finishes Grid's will. Their combined victory wins his loyalty and gives him companions rather than the lonely death he had expected. (Chapters 1751–1753 and 1755–1757)

Peace does not immediately follow. Muller admires Grid's ability to give heroes an ordinary, hopeful life and compares it with his own failure to unite the powers of his era. The comparison aggravates guilt into a heart demon severe enough to cause internal injuries just as Baal arrives to seize him. Muller spends his remaining strength on a Space Sword, but the Overgeared members and Grid's apostles protect him and defeat Baal's fragment. He subsequently overcomes the heart demon through his own will, accepts restorative food from the apostles, and returns with them to Reinhardt. Grid reframes his past: even Muller's imperfect arrangements, including the transformed great demons, helped later forces survive hell. Muller consequently joins the empire without receiving a restrictive office and begins living among the people he once believed he had abandoned. (Chapters 1760–1761 and 1764–1765)

Muller's later role is that of defender, diagnostician, and adviser. He teaches Piaro by helping him judge the path he has already chosen, recognizes the crisis inside Biban's mental world, and uses Heart Sword to open a way for Grid to restore the older Sword Saint without simply cutting his mind apart. He then advises Kraugel to master many imperfect traditions instead of treating one sword or one system as an objective ideal. The surviving hero has not lost his willingness to fight—Baal still regards him as a coveted target—but he no longer tries to carry humanity by himself. His latest firsthand activity places him inside the network of the Overgeared World, guiding others while protected by the same shared strength that persuaded him to return. (Chapters 1767, 1776, 1779, 1794, 1818, and 1832–1833)

Muller also returns to frontline combat rather than remaining only an adviser. He continues protecting Kraugel from martial influences that could overwhelm the younger swordsman's judgment, then joins the campaign against Fire Dragon Trauka. Muller aims Space Sword at Trauka's heart, accepting the heavier backlash of a lethal target; the world's protection prevents the intended kill and leaves both of his arms broken. He nevertheless reenters the battle and interposes himself when Trauka targets Euphemina, losing both arms completely but saving the magician. Much later, he ascends to Asgard with the reinforcements fighting Asura. Alongside Biban and Kraugel, he contributes to repeated Space Swords that break Asura's Annihilation-energy armor and create openings for Grid's coalition. By his final battle, Muller is an active member of that coalition whose teaching and sword remain available against the surface's strongest enemies. (Chapters 1876, 1918–1919, and 2050–2051)

Appearance and personality

Muller is a middle-aged man distinguished by large, clear eyes, thick eyebrows, broad hands, and calluses at every joint. When Kraugel finds him, his brown hair reaches below his ankles and trails like a cloak, imposing a real movement constraint even though his sword control prevents it from exposing an obvious gap. He later cuts the hair with sword energy before returning to the surface. His amiable expression and straightforward gaze contrast with the tremendous killing intent he can express, while the old iron sword at his waist preserves the plain appearance of the weapon he carried through the dark age. (Chapters 1745–1746, 1752–1753, and 1794)

At his core, Muller is compassionate, responsible, and unusually attentive to the weak. He decides that exceptional talent creates a duty to serve others, saves lives and cities that enemies consider beneath notice, and treats the sacrifice of bystanders as unacceptable even when it might advance the purification of hell. He is also observant rather than blindly idealistic. He judges the Specter's plan by its likely dimensional consequences, recognizes Grid's character through accumulated deeds, and can separate a person's mistaken identity from their genuine worth, as shown when he exposes Cabelon's false claim while still calling the ruins hunter a valuable hero. (Chapters 1252, 1745, 1752, and 1832–1833)

That compassion produces his central weakness. Muller remembers the people he failed more vividly than those he saved, treats his flight as unforgivable cowardice, and develops a heart demon when admiration for Grid sharpens his own guilt. His seclusion is not boredom or indifference; it follows the discovery that gods, dragons, and the corrupted afterlife make both life and death appear hopeless. Even in hiding, however, he watches the No Offspring Tomb and responds when people are endangered. His recovery comes through accepting that responsibility can be shared. Kraugel shows him a resilient generation, Grid validates the lasting value of his work, and the Overgeared members protect him at the moment he cannot protect himself. (Chapters 1745–1746, 1760–1761, 1764–1765, and 1776)

Muller is humble about his person but confident and exacting as a swordsman. He calls himself ugly, cowardly, or unworthy of trust, yet expects attention when teaching and can threaten a challenger through intent alone. His advice is often delivered through combat because he believes embodied experience reveals what explanation cannot. He also has a dry, sociable side: he teases Kraugel's certainty, readily accepts discussion with other masters, and treats awkward reunions with warmth. His willingness to reconsider his conclusions—about the safety of the surface, the value of equipment, or another person's chosen path—keeps his humility from becoming passivity after his return. (Chapters 1745, 1753, 1767, 1776, and 1794)

Abilities, classes, and skills

Muller is a Sword Saint whose power combines the Matchless Sword lineage, comprehensive sword experience, extreme sensitivity, controlled transcendence, and a uniquely developed heart. In historical accounts, those abilities let him seal great demons and deter human wars; after his return, they let him teach Kraugel through repeated lethal contests and contend with Absolutes when properly equipped. His reputation is not evidence of unlimited strength. His body and status stagnate during seclusion, his strongest mental techniques consume substantial stamina, and several victories depend on allies or borrowed weapons that correct deficiencies in his “pure” state. (Chapters 1124, 1252, 1376, 1745–1746, 1753, and 1755–1756)

Matchless Sword lineage and integrated development

Muller's core inheritance begins with Biban, the founder of the Matchless Sword and Matchless Heart Technique. Muller discovers Biban's traces, learns the system, and develops it beyond the form he received. The path integrates three elements—skill, body, and heart—rather than treating sword techniques as isolated attacks. His secret techniques preserve this integrated route for later Sword Saints, and Kraugel's class identifies learning them as the fastest way to increase power. Muller nevertheless does not regard inheritance as a final answer. His later teaching pushes Kraugel to study many forms, including flawed ones, because mastering diverse paths can expose assumptions that a single perfected tradition conceals. (Chapters 1124, 1221, 1254, and 1794)

The class also grants unusual control over transcendence. Muller's record defines transcendence as thinking, judging, and moving within roughly a tenth of a second, a state with extreme physical and mental consumption. Ordinary transcendents suffer recoil because they cannot manage it continuously, but a Sword Saint can control when and how it is applied. Muller combines that timing with centuries of battle reading. He sees through Beriache's false opening without making unnecessary movements and then uses the real gap for a delayed counterattack. The effect is not simple speed: observation, intent, and the correct instant allow him to act economically while opponents spend effort forcing reactions that never come. (Chapters 1376 and 1753)

Sword energy, sensitivity, and spatial techniques

Muller can project and manipulate sword energy at range, form it without drawing a weapon, and use it for offense, defense, movement, or surveillance. He leaves strands connected to the No Offspring Tomb and senses its destabilization from another dimension. He cuts his own hair with precisely controlled energy, creates a passage from the dimensional gap to the surface, and uses Control Sword to fly by standing on a rapidly moving blade. His Super Sensitivity once extended across the continent in connection with his role as its guardian, allowing him to perceive Beriache's death, the fall of her soul, and the movement of her body toward the Tomb. These senses remain exceptional after seclusion, though they do not by themselves raise his overall status to that of an Absolute. (Chapters 1745–1746 and 1749)

Space Sword is his ultimate spatial slash. At the No Offspring Tomb, it divides the ground, ceiling, and red flesh across a vast area, disrupting the souls stored in the Specter's material and opening the underground battlefield to outside attack. He can also use it while suffering critical internal injuries to cut Baal's body diagonally. Both scenes show immense reach and force, but neither makes the technique a costless answer. The Tomb repairs its divided structure and flesh, while the Space Sword used against Baal spends what remains of Muller's strength and leaves him unable to prevent capture. Environmental restoration, enemy immortality, and the user's condition can therefore limit the lasting result even when the cut succeeds. (Chapters 1755 and 1760)

Later battles demonstrate both a stricter counter and Muller's continued access to the technique. Against Trauka, he aims Space Sword at the Dragon Heart, but the protection attached to beings and terrain that cannot be permanently destroyed prevents the lethal result; the backlash breaks both arms, while a nonfatal target such as a limb could have produced a more lasting tactical gain. In Asgard, Muller instead uses Space Sword as part of a coordinated sequence with Biban, Kraugel, and Marie Rose. Their repeated slashes break Asura's Annihilation-energy armor faster than it can stabilize and allow the rest of the coalition to attack. The technique remains part of Muller's active combat repertoire through his latest battle, but target selection and allies determine whether its vast cutting power becomes a decisive result. (Chapters 1918 and 2050–2051)

Heart Sword and mental interaction

Heart Sword turns will and mental imagery into a blade that does not depend on ordinary contact. Muller can stab the Specter's heart from a distance, interrupting even an Absolute for a fraction of a moment, and can save Huroi by stopping her attack through the same principle. Heart Killing Intent is a more lethal development: merely directing a sharpened intent at Kraugel fixes the younger Sword Saint at the threshold of death until Muller releases the effect. The technique demonstrates why Baal covets his power, but its results depend on the target and context. The Specter shakes off repeated Heart Swords rapidly, requiring Grid to exploit the tiny openings rather than treating the effect as permanent control. (Chapters 1745, 1751–1752, 1755–1756, and 1761)

Heart Sword also operates on mental worlds and perceived reality. Muller creates a convincing illusion of stabbing Biban, diagnoses that Biban has begun recognizing himself as a sword rather than a human, and cuts an entrance into the resulting mental world. He refuses to solve the crisis by destroying that inner sword himself because doing so could damage Biban's memories, experience, and mind. Instead, he sends Grid to restore the person through conversation. This choice defines both an interaction and a limit: Muller's will can cut intangible structures, but a successful cut is not always the desired outcome, and his direct method may be too destructive for healing. (Chapters 1776 and 1779)

The heart's power has a severe mental cost. Repeated Heart Swords against the Specter exhaust Muller's concentration, slow his ranged assistance, and leave him breathing heavily. His heart demon later converts accumulated guilt into physical collapse and internal bleeding, reducing him to a state in which one final technique consumes his remaining strength. Muller eventually overcomes that disorder without external purification, confirming exceptional mental resilience, but recovery still requires rest and restorative food. A developed heart can sustain centuries of isolation and overcome backlash; it does not make him immune to despair, self-reproach, or exhaustion. (Chapters 1755–1756, 1760–1761, and 1764)

Weapon communion, progression, and limits

As a Sword Saint, Muller can communicate and assimilate with swords, replacing the achievements and properties encoded in a weapon with a status that he can use as his own. Grid's procession of thousands of weapons gives him choices unavailable in his era. A White Tiger Sword corrects enough of his deficient energy and body to let him briefly complete the Realm of the Absolute, while Gujel's Sword brings his skill and physical condition to a more perfect level. He moves among weapons according to the needed property rather than remaining bound to one blade. This is a demonstrated interaction with equipment, not proof that his unaided body permanently becomes Absolute. (Chapter 1753)

His baseline after seclusion remains close to, but below, an Absolute. Kraugel judges his status to be that of a high transcendent, his sword energy competitive with higher beings only within swordsmanship, and his heart comparable to an Absolute's. Centuries in the dimensional gap preserve his mind but interrupt the accumulation of achievements that could have completed the rest of his development. Long hair imposes a self-created physical constraint until he cuts it, and his old iron sword is far inferior to Grid's divine equipment even after becoming a treasured weapon through long use. Borrowed arms compensate for these gaps, but damage, stamina loss, and superior status can still break his defense. (Chapters 1745–1746, 1753, and 1755–1756)

Muller's latest progression is therefore social and instructional as much as numerical. He returns from isolation, accepts the Overgeared Empire's protection, helps restore Biban, and becomes Kraugel's long-missing adviser. He no longer presents his own swordsmanship as the universal ideal; he asks Kraugel to master many traditions, protects the younger Sword Saint from being possessed by Chiyou's martial arts, and ultimately identifies the best sword as the one Grid will make for its intended wielder. He also resumes direct combat, using Space Sword against Trauka and later joining the Sword Saints who repeatedly break Asura's Annihilation-energy armor. By chapter 2051, Muller retains his ultimate technique and serves as both a living mentor and an active combatant embedded in a shared defense rather than a solitary legend presumed dead. (Chapters 1765, 1776, 1779, 1794, 1818, 1832–1833, 1876, 1911, 1918–1919, and 2050–2051)

Relationships

Muller's relationship with Grid gives his return a stable direction. He first evaluates Grid as a god whose cooperation with the Specter might endanger the surface and is prepared to oppose him. Once Grid's actual plan and history become clear, Muller recognizes a leader who has achieved the unity he could not. Grid supplies the swords that complete Muller's battlefield potential, trusts him as a treasured sword, preserves his life after the Specter battle, and later argues that humanity's present progress rests partly on Muller's earlier work. Muller responds with respect, joins Grid's empire, and helps protect the people around him without surrendering his independent judgment. (Chapters 1752–1753, 1755–1757, 1760, and 1765)

Kraugel begins as Muller's successor and becomes his student in practice. He spends years resisting the demand to become a copy, then enters the dimensional gap not to plead for Muller's return but to test himself against him. That refusal to center the old hero is exactly what relieves Muller. Their repeated duels advance Kraugel's Matchless techniques, and Muller later broadens the lesson by challenging his belief in one objective sword. Kraugel gives Muller evidence that the surface can survive through many capable people; Muller gives Kraugel an adviser who respects his individual path enough to criticize its blind spots. (Chapters 1254, 1376, 1745, and 1794)

Muller treats Biban as both predecessor and person. He inherits and expands Biban's Matchless Sword, continues to address him respectfully, and recognizes that centuries of relentless development have taken Biban beyond Muller's old prime. When Biban's pursuit of sword unity begins erasing his humanity, Muller diagnoses the problem without claiming that his own Heart Sword is the only answer. He uses Grid's bond with Biban to preserve the older swordsman's mind. Their relationship consequently reverses the simple lineage: the successor who once learned from Biban later protects the originator by understanding where an otherwise greater technique has led him. (Chapters 1124, 1480–1481, 1776, and 1779)

Baal and the Specter embody the two threats that shape Muller's disappearance and return. Baal's corrupted hell convinces him that death offers no escape, while the Specter's power and possession of Beriache's remains help drive him from the world. Centuries later, Muller returns specifically because the Tomb again threatens the surface. He opposes the Specter's method without denying the wish to restore hell, then fights beside her former enemies after Grid changes the outcome. Baal immediately tries to claim Muller's Heart Killing Intent, only for the Overgeared group to defend him. The same dangers that once isolated Muller thus become the circumstances through which he learns to rely on companions. (Chapters 1745–1746, 1751–1753, 1755–1757, and 1760–1761)

Items

No notable items are documented for Muller in the supplied corpus.