The discarded eldest son of Brigadier General Kim Woong-bang. Branded a useless "Mana Rejector," he was betrayed and thrown off a cliff by his family's operatives. Merging his soul with the ancient Absolute Poison Demon, Tang Gun-ak, Tae-ju developed a cold, ruthlessly pragmatic, and highly strategic demeanor. He leverages his ancient biochemical intellect to build Taehong Bio, aiming to conquer the pharmaceutical market and eradicate those who discarded him. Powers: Master of the Primordial Formless Poison Spirit Art (7th Star Realm). Employs Willow Leaf Daggers with lethal hidden-weapon trajectory arts, Formless Poison Palm, core-shattering body reformation, toxin absorption/immunity, and the Infinite Space Spell Formation.

The legendary Absolute Poison Demon and former Lord of the Sichuan Tang Clan. After his physical death centuries prior, his spectral remnant inhabited the spiritual plane until binding with the dying Kim Tae-ju. He serves as an ancient martial repository, guiding Tae-ju's cultivation breakthroughs with sharp wit, ancestral pride, and profound alchemical expertise. Powers: Supreme historical mastery of all Sichuan Tang Clan secret manuals, thousand-poison cultivation formulas, hidden-weapon ballistics, soul-resonance guidance, and ancient Daoist spatial formation arrays.

The Master-rank Guild Master of the Nogodan Guild and undisputed underworld sovereign of Gurye. Initially arrogant and dismissive of Tae-ju’s commercial expansion, he clashed with Taehong Bio during drug-trafficking crackdowns. After being afflicted by an incurable neurotoxin, he was forced to bend the knee to Tae-ju in exchange for his life, transforming into an unwavering field vanguard for Taehong Bio. Powers: Master-rank physical reinforcement, devastating broadsword aura projection, instinctual close-quarters martial arts, and high-tier defensive mana shrouds.

An elite corporate strategist and daughter of Pharmacist Baek Hong-pyo. Formerly an executive at Mirinae Group, she resigned after refusing to betray her father’s business ethics. Recognizing Tae-ju’s revolutionary pharmaceutical dominance, she became the Chief Executive Administrator of Taehong Bio, running operational logistics, supply lines, and contract negotiations. Powers: Master-class corporate administration, financial warfare strategy, logistical organization, and commercial intelligence analysis.

A veteran pharmacist operating in Gurye who possesses uncompromising integrity. He was the first merchant to recognize Tae-ju's alchemical genius, partnering with him during his disguised porter phase to mass-produce the three-striped mosquito antidote. He serves as the moral and practical anchor of Taehong Bio's manufacturing wing. Powers: Master-level conventional pharmacology, rapid antidote compounding, medicinal herb procurement, and pharmaceutical laboratory management.

Lieutenant General and Supreme Commander of the Jirisan Monster Defense Corps. Pragmatic, duty-bound, and burdened by escalating military casualties from mutated bioweapons, he bypassed imperial bureaucracy to sign a historic 50 billion won exclusive antidote procurement contract with Taehong Bio, securing front-line troop survivability. Powers: High-tier Superior Expert combatant, military grand strategy, commanding imperial legionnaires, and heavy artillery coordination.

The 21-year-old 5th Prince of the Samhan Empire. A gifted martial prodigy sent to the Mt. Jiri front to gain military merit, he found himself overwhelmed by elite beast ambushes during the Grand Subjugation. Rescued from certain death by Tae-ju, he developed deep reverence for the mysterious poison master, bridging imperial court backing to Taehong Bio. Powers: Superior Expert-rank imperial sword arts, refined royal mana circulation, high-speed footwork, and royal command authority.

A ruthless Brigadier General in the Imperial Army and the biological father of Kim Tae-ju. Obsessed with bloodline prestige and military power, he viewed his mana-rejecting eldest son as an indelible stain on the family honor, ordering his quiet assassination on the Mt. Jiri cliffs. Powers: Master-rank military combatant, immense political-military influence, command over elite assassination squads, and imperial factional leverage.

An unscrupulous executive representing hostile pharmaceutical conglomerates linked to the Mirinae Group. He employed corporate espionage, extortion, and hitmen to forcibly seize Tae-ju’s antidote patents before being systematically outmaneuvered and eliminated. Powers: Corporate syndicate manipulation, illicit underworld mercenary hiring, political bribery, and economic sabotage.