Beelzebub

Beelzebub is the hound-headed Primordial Demon of Gluttony whose destruction of Arcadia City makes him Aengus Degaro's earliest great enemy. For much of the story he acts through consequences rather than direct scenes: his Devour consumes settlements, his armies and children extend his authority, and his bloodline enters Aengus through the Dreadnaught Colossus. When Beelzebub finally appears in person, his confidence in that inherited sin-power collapses before the Heir of Ruination who grew out of the disaster he caused. (Chapters 73–81, 323, and 331–337)

Biography

Gluttony’s shadow over Aengus

Beelzebub's early history is established through survivors and witnesses rather than through his own viewpoint. He commands the assault on Arcadia City so that his children, the Dreadnaught Colossi, can grow stronger, and the attack culminates in his devouring the city and roughly two hundred thousand people. The same appetite had already destroyed Leon's homeland, family, and village years earlier, showing that Arcadia was part of a recurring pattern of predation rather than an isolated military strike. These reports establish the scale of Beelzebub's reach while preserving the fact that he is not yet directly present in the narrative. (Chapters 73 and 79)

The invasion leaves an intimate biological legacy inside Aengus. After the Dreadnaught Colossus's demonic core is synthesized into him, Aengus is identified as carrying a partial-royal Beelzebub bloodline, with the possibility that inferior forms of the Demon Lord's abilities may awaken. Aengus later explains that the bloodline core attempted to possess and transform him, so this inheritance is not a gift or alliance from Beelzebub; it is an unintended consequence of the Demon Lord's forces and becomes a bitter source of strength for the survivor who vows to kill him. (Chapters 74–76 and 184)

Beelzebub's unseen authority continues to shape Aengus and Bella Bellfrost's plans. Bella had crossed realms under his command to recover the Dreadnaught Colossus's Darkness Core, while Aengus realizes that confronting a ruler with billions of demons requires an army of his own. Revenge therefore develops into the broader Liberation project: the pair seek enough strength to challenge Beelzebub, stabilize the divided world, and free people subject to its rulers. By the time they part from Kylian, destroying the fifth-ranking Demon Lord is recognized by others as a defining destination of their journey. (Chapters 81, 109, 128, and 144)

Primordial conflict in Mythraldor

Beelzebub first participates directly when the Primordial Demons gather around Lucifer. He appears as a burly humanoid with a hound's head, mocks Lucifer for losing track of the Heir of Ruination, and questions whether that legacy could rival the Devour granted to him by the demons' Supreme Father. His challenge reveals the confidence underlying his long reign: Beelzebub treats his signature ability as a standard against which cosmic inheritances should be measured, even though Aengus's Omni-Devour has already demonstrated a scale that local Ice Wraiths explicitly judge beyond Beelzebub's reach. (Chapters 322–323)

That confidence weakens when the gathered powers confront Aengus's Void manifestation. Beelzebub initially observes the trembling Moon God and participates in the Primordials' wary assessment, but the Void Entity's gaze leaves him feeling as though his essence and secrets have been exposed. Once Aengus singles him out, Beelzebub cannot continue fleeing and calls desperately for Lucifer's aid. The other six Primordials build a coordinated darkness barrier around him, yet the residual force shatters it, flings them away, and makes Beelzebub appear erased to the surrounding witnesses. (Chapters 328 and 331–333)

The apparent annihilation is instead a capture. Aengus brings an immobilized and terrified Beelzebub before Aria, reveals himself as the Heir of Ruination, and keeps the Demon Lord inside a spatial pocket while ordering the Liberation Army's great unification campaign. This reversal makes Beelzebub both the personal object of Aengus's revenge and a demonstration of the new imperial order: a being once protected by billions of demons and feared across worlds can no longer resist, escape, or rely on the solidarity of the other sins. (Chapter 334)

Aengus later forces Beelzebub to recognize him as the boy who escaped Arcadia, invades his memories, and discovers that Lucifer possesses something connected to the Ruination Extremity. He then kills and devours Beelzebub, receiving three levels, the SS-rank Deadly Sin: Devour, and Beelzebub's royal bloodline, which is assimilated into his Fiend-Celestial bloodline. Beelzebub's last contribution is therefore wholly involuntary: his body, power, and knowledge strengthen the survivor he created, while the Liberation demons soon regard former terrors such as Beelzebub as foes they have grown able to face. (Chapters 337 and 340)

Defeat and the later revival order

Beelzebub does not return after his death. His posthumous “service” consists of the Devour skill, royal bloodline, and memory concerning Lucifer that Aengus extracted in Chapter 337, not a renewed allegiance or a direct role in the later empire. When Aengus eventually reaches the Book of Life and Death, he identifies the city Beelzebub devoured and asks that victims still in limbo or hell be restored, while leaving those who have already reincarnated in their new lives. The order turns Beelzebub's defining atrocity into unfinished karmic business that Aengus now has the authority to settle. (Chapters 337 and 446)

Arcadia City and many of its citizens are consequently restored where the lost city once stood. Aria tells her family that clan members killed in Beelzebub's attack have returned, although Aengus confirms that reincarnated victims are not displaced from their current lives. The outcome cannot erase every loss, but it reverses much of the material and human devastation on which Beelzebub's reputation rested. His latest state remains death; what survives is an inherited power in Aengus and a historical wound whose victims finally receive selective restoration. (Chapters 446 and 448)

Appearance and personality

In his direct appearance, Beelzebub has a burly humanoid build and the head of a hound; Aengus's memory of Arcadia presents his attacking form as a massive, hound-like demonic creature large enough to loom over the city while consuming it. The corpus does not explain whether these are separate transformations or differing descriptions of scale, so both should be understood as observed forms rather than a documented transformation system. His eyes become bloodshot under panic and torture, and his long, grotesque tongue is visible during Aengus's mental intrusion. (Chapters 323 and 337)

Beelzebub is defined by appetite, cruelty, and confidence in the status Gluttony affords him. Reports describe an insatiable hunger capable of treating cities and souls as nourishment, while his direct dialogue is mocking toward Lucifer and dismissive of Ruination's superiority to his own Devour. That outward calm is not courage without limits: the Void's scrutiny unsettles him, immobilization drives him to plead for protection, and recognition of Aengus reduces him to hysteria. His fear reveals that his arrogance depends heavily on power, rank, and the expectation that the Primordials can protect one another. (Chapters 73, 323, and 331–337)

Skills, laws, and abilities

Beelzebub's abilities center on the deadly sin of Gluttony and its signature Devour. The corpus presents him as one of the seven strongest Demon Lords and later identifies the group as Primordial Demons, placing his power far above ordinary rulers and city defenders. His demonstrated and reported effects are extensive, but his exact personal level, energy reserves, cooldowns, and complete skill list are never shown; the limits below therefore rely on direct comparisons and defeats rather than invented numerical thresholds. (Chapters 73, 322–323, and 337)

Gluttony and Devour

Devour allows Beelzebub to consume physical matter, energy, and souls, converting what he takes into raw, undiluted Nether Energy while possessing additional capabilities the early account does not enumerate. Its breadth distinguishes it from Aengus's inherited Gluttony of Darkness, which chiefly improves strength, agility, and endurance and supplies comparatively little Nether Energy. The SS-rank Deadly Sin: Devour obtained from Beelzebub after his death is specifically recorded as increasing raw strength through consuming materials, confirming growth through consumption while not proving that this inherited version reproduces every function of Beelzebub's original power. (Chapters 73, 88, and 337)

The ability works at catastrophic civic scale. Beelzebub consumes Arcadia City and its population in a single calamity, had previously devoured Leon's entire village and family, and leaves frontline defenders overpowered by his Devouring Force. These uses demonstrate attacks against structures, living bodies, souls, and defending combatants rather than ordinary feeding. The source nevertheless gives no exact range, activation time, or resistance formula, and it never shows Beelzebub successfully devouring an opponent at Aengus's later cosmic level. (Chapters 73, 79, 232, and 337)

Consumption-driven growth and bloodline

Consumption serves both Beelzebub's growth and the cultivation of his lineage. He attacks Arcadia with the stated purpose of strengthening his Dreadnaught Colossus children, while his royal bloodline persists through a core capable of attempting possession and demonic transformation. When a partial form enters Aengus, it creates the potential for inferior versions of Beelzebub's abilities to awaken; after Beelzebub's death, the complete royal bloodline is absorbed and assimilated into Aengus's Fiend-Celestial lineage. These events establish transmissible bloodline influence, but they do not show Beelzebub consciously controlling Aengus through it. (Chapters 73–76, 184, and 337)

The Dreadnaught Colossus connection also shows that Gluttony's application is strategic rather than purely personal. Beelzebub uses a city-scale massacre to feed the development of his children and dispatches servants across realms to recover their Darkness Core, tying military expansion, reproduction, and resource retrieval to the same hunger-centered rule. That machinery has practical constraints: the cross-realm treasure permits only a small group to pass, the core ends up in Aengus instead of returning to Beelzebub, and the resulting bloodline empowers the enemy who eventually kills him. (Chapters 73, 81, and 109)

Primordial demonic power and authority

As one of the seven deadly Demon Lords, Beelzebub rules a region of the Demon Land with authority over vast demonic forces; Aengus estimates billions of demons under his command. Beelzebub can participate with the other Primordials in forming a barrier of raw darkness energy whose massive bodies act as anchors, and his status is intimidating enough that Ice Wraiths initially mistake a distant devouring phenomenon for his work. His command power extends through children, servants, and summoned armies, although the corpus does not isolate a named personal summoning spell or show him directing those billions in battle. (Chapters 73, 81, 109, 322, and 333)

His standing has clear ceilings. The Ice Wraiths determine that Aengus's Omni-Devour operates on a scale Beelzebub could never wield, Ruination's pressure can immobilize him before direct contact, and the combined defense of all seven Primordials cannot keep Aengus from taking him. Once captured, Beelzebub cannot break a spatial pocket, prevent the invasion of his memories, or stop Aengus from absorbing his skill and bloodline. These defeats show that Gluttony's versatility and accumulated power do not grant immunity to superior spatial, mental, or Ruination-based control. (Chapters 322–334 and 337)

Memory and power inheritance

Devouring Beelzebub transfers more than energy. Aengus gains three levels, the SS-rank Deadly Sin: Devour, and a royal Beelzebub bloodline, while direct contact with Beelzebub's mind reveals Lucifer's connection to the Ruination Extremity. The sequence makes Beelzebub a source of recoverable biological, skill, and informational value after defeat. It does not establish that Beelzebub can voluntarily bestow memories or abilities, nor that his consciousness survives inside Aengus; the latest evidence treats the Demon Lord's body as lifeless before the absorption occurs. (Chapter 337)

Relationships

• Aengus Degaro: Beelzebub destroys Aengus's city and loved ones, inadvertently leaves him a partial-royal bloodline through the Dreadnaught Colossus, and becomes the target around whom Aengus builds his early vengeance and army. Aengus ultimately captures, interrogates, kills, and devours him, taking the full royal bloodline, Devour, and knowledge about Lucifer before later restoring many of his victims. (Chapters 73–81, 184, 322–337, and 446–448)
• Bella Bellfrost: Bella serves under Beelzebub's authority when she crosses realms to retrieve the Dreadnaught Colossus's Darkness Core. Saving Aengus and helping him develop a force against Beelzebub turns that mission into a lasting break from the Demon Lord's interests. (Chapters 73, 76, 109, and 144)
• Lucifer: Beelzebub mocks Lucifer's failure to trace Aengus and doubts that Ruination can surpass his Supreme Father-given Devour, but calls urgently for Lucifer's protection once targeted. Lucifer and the other Primordials defend him together and fail; Beelzebub's extracted memories then direct Aengus toward Lucifer's connection with the Ruination Extremity. (Chapters 323 and 331–337)
• Leon: Beelzebub devoured Leon's family, village, and homeland years before Arcadia, creating the Guardian General's enduring personal hatred. Leon later identifies the same Gluttony power as the cause of Arcadia's destruction. (Chapter 79)
• Dreadnaught Colossi: Beelzebub calls the Colossi his children and uses Arcadia's destruction to make them stronger. He also orders the recovery of a child's Darkness Core, but that core instead merges with Aengus and carries Beelzebub's bloodline into his eventual killer. (Chapters 73–76 and 109)

Items

• No individually named weapon, armor, or personal artifact is assigned to Beelzebub in the supplied corpus. Devour is an innate deadly-sin ability granted by the Supreme Father, while the realm-crossing treasure used in the Darkness Core mission is neither named nor shown in Beelzebub's personal possession. (Chapters 109 and 323)