Izax

Biodata

Feature	Value
Name	Izax (伊扎克斯)
Alias(es)	Great Demon; Demon Monarch / Demon King; “Mad Demon King”; Old King
Species/Race	Demon
Gender	Male
Affiliation	Hao Ren’s household; former ruler of the Demon King Empire 67 463
Occupation/Role	Former Demon Monarch; combatant, strategist, and artificer
Status	Alive 1673
First Appearance	67

Power Progression

Stage / Realm / Level	Chapter	Notes
Demon Commander / Warlord	396	Originally one of the territorial demon leaders whose forces fought constantly for temporary holdings.
Demon Lord	396	Became a Lord after pacifying a territory and driving out nearby rival demons; this gave him a stable domain and force.
Demon Monarch / Demon King	396	Reached the highest demon rank, commanding Lords, a demon nation, armies, subjects, and an inheritance system. He later built the largest empire his world had known.

Background / History

Izax originates from another universe whose physical constants are highly similar to Earth’s. His homeworld was shaped by disconnected spatial “bubble zones,” unstable portals, and constant conflict among demons, humans, elves, dwarves, and other races. In his youth, he was an ambitious demon commander who rose to become a Lord by seizing and stabilizing territory. 67 396

As a newly established Lord, Izax invaded a human kingdom to demonstrate his strength. While inspecting the conquered capital, he encountered an elderly human Alchemist who was more concerned with his research than the demon invasion. Izax eventually accepted the Alchemist’s argument that the universe beyond their world was vastly more significant than their racial wars. He appointed the human as his chief scholar and supported his research into the boundary of the space bubble zone. 396 397

The encounter changed Izax’s ambitions. Rather than merely expanding demon territory, he sought to unite the world so its combined strength could explore the universe. He established an empire with symbiotic cities, equal laws, and moral codes across races, but pursued this goal through conquest. His empire ultimately collapsed under revolts by a united alliance of races and betrayal from his own demon compatriots. During the disaster, his daughter Elizabeth was believed lost in a spatial rift. 398 430

After losing his empire and nearly dying, Izax was encountered by a Time-Space Administration Bureau observer. He was later brought to Earth by Hao Ren, becoming one of Hao Ren’s tenants. Having “fought enough battles,” he initially wanted only a quiet, peaceful life. 70 81

Lanina later brought news that Elizabeth might have survived. Izax returned to his homeland with Hao Ren’s group, discovered that Elizabeth had preserved the Demon King’s City by piloting a Demon Puppet disguised as him, and reunited with her. 401 435 437

Following the rescue of the city and its inhabitants, Izax refused to restart the war against the Human World. He arranged for the city to settle with the Erem elves, handed its administration to Gadamor and Lanina, and designated Elizabeth as his successor. 438 463

Appearance

Izax’s ordinary human guise is still imposing: a bald, dark-skinned, heavily muscled man standing around two metres tall, with a broad inverted-triangle build and a naturally intimidating face. 68 230

• Demon form — A five-to-six-metre lava demon surrounded by erupting flame, molten rock, and sulfurous heat. 67 311
• True aura — His released presence can make nearby structures vibrate and is recognizable even to his daughter despite physical disguises. 435
• Broken horn — An iconic feature reproduced by the false “Mad Demon King” image. 419
• Demonic armor — His clothing can transform into a smaller set of demonic armor when entering combat. 301

Personality

Despite his terrifying appearance and former reputation, Izax is polite, patient, and unusually reflective for a demon monarch. He lowers himself when speaking to smaller people as a gesture of courtesy, though the resulting flames and molten slag can make the gesture hazardous. 67

He values peace between races, intellectual curiosity, and exploration. His worldview was shaped by the human Alchemist who taught him to look beyond local conflicts toward the scale of the universe. He accepts that not all of his followers share his ideals and prefers assigning people according to their strengths rather than forcing agreement. 397 439

Izax’s methods can remain bluntly demonic. When confronted by Demon Hunters, he attempted to “teach” them coexistence by overpowering them and demanding they promise to become good people. 113 114

His greatest vulnerability is his family. News of Elizabeth’s survival immediately overcame his earlier desire for retirement, and his reunion with her revealed a gentle, openly affectionate side rarely seen in battle. 401 435 436

Abilities & Skills

Demonic Transformation

Izax can compress his enormous demonic body into a human-like form or expand into a giant lava demon.

• His human form makes ordinary travel and conversation possible, though he remains exceptionally large. 67 68
• His true form exceeds five metres in height and releases intense heat, flame, and lava. 250 311
• Transformation is an innate bloodline ability rather than ordinary magic; Elizabeth’s mixed heritage prevents her from using it as easily as Izax. 466
• He can assume a Fire Giant-like combat form to intimidate and distract enemies. 1128

Netherflame and Lava Manipulation

Izax wields highly controlled demonic fire, including Netherflame.

• His Netherflame can vaporize hafnium alloy within seconds while producing almost no heat more than a centimetre away from the flame. 212
• He can create colossal fireballs, flame shields, lava lakes, and destructive shockwaves. 250 301 459
• He used his power to call down a meteorite and completely destroy an abandoned castle. 68
• He can propel himself through low gravity by firing a Flame Strike behind himself. 247

Physical Combat

Izax combines extreme strength with unexpectedly high speed and extensive combat experience.

• He intercepted a teleporting Demon Hunter’s assassination attempt before the attacker could strike Hao Ren. 113
• He can overpower Stone Giants through direct force, including tearing off and crushing their heads. 192
• In battle, he wielded a demon sword capable of unleashing shockwaves powerful enough to annihilate groups of lesser demons. 459
• He defeated Demon Monarch Seradon during the battle to evacuate the Demon King’s City. 459

Spatial, Shadow, and Soul Arts

Izax possesses broad knowledge of demonic magic beyond direct combat.

• He can construct one-use obsidian portals using demon runes and demonic energy. 421
• His former profession involved Descent Summoning, allowing him to project himself into other regions through summoned vessels. 364
• He can create shadow orbs and use them to counter or banish Chaos Shadows. 896
• He performed a soul-related ritual to remove a mental debuff from Demon Hunter elder Andal with exceptional ease. 907

Forging and Technical Knowledge

Izax is skilled in demonic weapon forging and understands magical-industrial systems.

• He processed Demon Stone with demonic energy into durable enchanted short swords, then sold them in the Dream Plane to fund the group. 182
• He helped assess and operate the Demon King’s City’s portal, energy, and defense systems. 439 548
• His interest in science and cosmic exploration stems from centuries of studying the universe alongside the human Alchemist. 397 447

Equipment / Weapons / Items

• Black demon sword — Used during the battle against Seradon’s demon legion; its magic patterns release heavy explosive shockwaves. 459
• Demonic armor — Formed from his transformed clothing during combat. 301
• Demon Stone short swords — Enchanted weapons forged by Izax and sold to a Dream Plane weapon shop. 182
• Obsidian portal altar — A temporary, one-use portal device created from smelted obsidian and demon runes. 421

Relationships

• Hao Ren — Housemate, ally, and close friend. Hao Ren brought Izax to Earth, supported his search for Elizabeth, and accompanied him back to the Demon Plane. 67 401 435
• Elizabeth — His daughter and designated successor. Izax believed her lost for a year before reuniting with her in the Demon King’s City. 396 435 463
• Lanina — Long-serving succubus strategist and loyal subordinate. She located Izax on Earth and delivered the news that Elizabeth might be alive. 400 401
• Gadamor — Elderly butler and trusted administrator of the Demon King’s City; Izax entrusted him with managing the city during Elizabeth’s minority. 435 463
• The human Alchemist — A captured scholar who became Izax’s chief researcher and fundamentally changed his view of war, race, and the universe. 396 397
• Elizabeth’s human mother — Izax’s late wife; their marriage crossed the divide between demon and human society. 436
• Ramondino — Veteran demon general who fought alongside Izax before the Unification War and later returned to fight with him again. 439 459

Story Role / Major Arcs

• Arrival on Earth — Hao Ren retrieves Izax from an ancient castle after his fiery interuniversal arrival. Izax joins Hao Ren’s household and receives translation support through Raven 12345’s technology. 67 81
• Demon Hunter conflict — Izax becomes the group’s decisive defender against Demon Hunters, effortlessly neutralizing attackers while attempting to force them toward peaceful coexistence. 112 114
• Dream Plane expeditions — He contributes combat power, weapon forging, survival expertise, and transportation during the group’s journeys through the Dream Plane. 182 183 249
• Demon King’s past — Izax reveals the history of his empire, his encounter with the human Alchemist, and the loss of Elizabeth. 396 398
• Return to the Demon Plane — He leads Hao Ren’s group through his homeland to investigate rumors of a false Mad Demon King and locate Elizabeth. 405 420
• Reunion and succession — Izax reunites with Elizabeth, learns how she preserved the Demon King’s City, rejects a renewed war, and retires from rulership. 435 438 463
• Later operations — He continues serving as a powerful field operative, including countering Chaos Shadows, protecting allies with fel-energy shields, and fighting corrupted monsters alongside Hao Ren’s team. 907 1128 1615

Notable Quotes

“I just want to find a place where no one will disturb me and live quietly for the rest of my life.” 70

“The more I see, the more I realize my own ignorance. I began to feel awe for the entire universe and couldn't wait to uncover its secrets.” 398