A reincarnated Demon King who regressed fifteen years into the past following his humiliating demise at the hands of human heroes. Disillusioned with demonic traditions, Berje completely abandons the archaic "Demon King's Standards" in favor of cold pragmatism, deceptive espionage, asymmetric warfare, and technological integration. Operating simultaneously as a sovereign overlord and the masked operative "Fyle," he views morality as an obstacle, willingly manipulating kingdoms, kidnapping royals, and enslaving heroes to ensure his absolute survival and supremacy. Powers: Master of Dark Flame magic and host to an absorbed Phoenix Core embedded directly in his heart, granting devastating continuous pyromancy and hyper-regeneration. Utilizes the forbidden dimensional sealing art Arcana's Purgatory and commands advanced dwarven siege weaponry.

Formerly a celebrated golden boy and top-tier vanguard hero of the Hilderan Kingdom. After leading a failed raid on Berje's newly fortified tower, he was defeated, subdued, and implanted with Larmani's Orbi. Stripped of autonomy, Hillan operates as Berje's most effective double agent within the Heroes' Guild, funneling critical intelligence, sabotaging human expedition funds, and carrying out covert assassinations while maintaining his public persona as a shining paragon of justice. Powers: High-tier Holy Swordsmanship, expert battlefield leadership, aura blade projection, and coordinated dual-strikes executed under Berje's telepathic command.

The First Princess of the Hilderan Kingdom, publicly known as an elite royal mage. In truth, she is an artificially engineered "World Tree's Child," subjected to horrific biological and arcane experiments by her own father to produce a living elemental conduit. Harboring deep-seated hatred for her royal bloodline, she intentionally allows Berje to "abduct" her, entering into a strategic pact to dismantle the Hilderan monarchy from within while acting as his high-ranking political operative. Powers: World Tree spirit resonance, high-circle elemental spirit magic, nature manipulation, wide-area defensive barriers, and refined imperial statecraft.

A cowardly yet historically unparalleled dwarven master craftsman abducted from his mountain forge by Berje. Driven entirely by self-preservation and terrified of demonic wrath, Loger channels his neurotic anxiety into frenzied engineering. He revolutionizes demon tower warfare by combining ancient dwarven metallurgical secrets with demonic mana cores, constructing heavy artillery defenses and eventually outfitting Berje's entire fortress with colossal mechanical walking legs. Powers: Master dwarven craftsmanship, magical rune-forging, mana artillery engineering, siege weapon design, and mechanical architectural synthesis.

The Demon King of Lies, renowned across the Demon Realm for his serpentine intellect, predictive calculations, and intricate geopolitical plots. Unlike brute-force lords, Jason specializes in proxy wars, biological chimera creation, and political subversion within human imperial houses. He views Berje as an unpredictable anomaly disrupting the balance of power, sparking a covert war of intellect and manipulation between the two lords. Powers: Mind manipulation, sensory illusion arts, chimera flesh-synthesis, and wide-range geopolitical espionage networks.

The undisputed pinnacle of human martial might, standing as the absolute 1st Star Hero of the continent. Balaff possesses an unyielding warrior ethos backed by catastrophic physical strength capable of annihilating entire demonic legions single-handedly. Intervening during the Jespine Succession War on Utera Island, he becomes Berje's greatest physical threat until he is outmaneuvered not through martial combat, but via forbidden dimensional banishment. Powers: Peak superhuman physical conditioning, supreme armament aura, mountain-shattering sword strikes, and high magic resistance.

Queen of the Blood Moon Tribe and the Demon King of Lust. Despite her formidable charm and illusion magic, her poor tactical judgment and political miscalculations leave her territory ravaged by human crusades. Ambushed and overwhelmed by Berje's forces, she is subjugated, her tower merged into his fortress, and her faction integrated as an auxiliary espionage unit under his direct authority. Powers: Seduction and charm arts, Blood Moon illusion casting, sensory disorientation, and stealth-based soul drain.

A barbaric, traditionalist Demon King who governed the Beast Tower through raw physical brutality and horde dominance. Trapped in orthodox demonic defense doctrines, he fails to recognize the changing tides of hero warfare. His territory, hoarded treasures (including the Phoenix corpse), and life are systematically dismantled when Berje orchestrates an internal hero breach and eliminates him. Powers: Beast transformation, feral berserker rage, primeval physical durability, and beast-horde telepathic commanding.

The timid, overlooked 17th Prince of the Jespine Empire. Lacking political backing and marked for execution during the brutal Succession War on Utera Island, Noah becomes a prime pawn for foreign intervention. Rescued and backed by Berje's undercover persona, he is elevated into a ruthless royal claimant through demonic backing, serving as Berje's future imperial puppet inside the continent's strongest human empire. Powers: Imperial succession authority, basic royal swordsmanship, and political legitimacy backed by demonic enforcers.