The legitimate direct-line grandson of Taesung Group Chairman Kang Ok. Forced into hiding following the suspicious deaths of his parents, Ji-hyeok assumes the false identity of Seo Ji-hyeok to infiltrate Taesung’s lowest corporate echelon - the Special Sales Department. Cold, calculating, and relentlessly pragmatic, he views corporate succession as a battlefield requiring both Machiavellian intellect and devastating physical violence. Parallel to his mortal identity, he embodies the awakening soul of the black dragon Lune Eclipse, blending ancient primordial authority with modern executive ruthlessness to avenge his family and conquer the conglomerate throne. Powers: Master-level close-quarters combat, lethal joint-manipulation, tactical firearms proficiency, advanced forensic financial auditing, psychological warfare, and Draconic Word Magic (vocalized incantations capable of subduing hostile entities and taming spiritual flora/fauna).

The iron-willed founder and supreme Chairman of Taesung Group. A ruthless kingmaker who built a commercial empire from the ashes of post-war Korea, Kang Ok values absolute strength, competence, and bloodline resilience above filial affection. While fully aware of the predatory ambitions surrounding his failing health, he treats the succession struggle as a natural crucible, deliberately testing Ji-hyeok's capacity to crush his kin and external syndicates before handing over the empire's ultimate keys. Powers: Supreme political leverage, absolute corporate authority, unyielding psychological intimidation, master strategist with vast intelligence networks.

Ji-hyeok’s fiercely loyal field lieutenant and underworld enforcer. Operating within Seoul's dark alleys and Dongdaemun's syndicate territories, Jang-woo executes the violent, extrajudicial tasks required to clear the board for Ji-hyeok’s corporate plays. Unflinching in the face of rival gangs or armed mercenaries, he provides the physical foundation upon which Ji-hyeok's executive empire is established. Powers: Expert street-brawling, crowd suppression, tactical reconnaissance, underworld intimidation, high-pain tolerance, and perimeter security management.

Initially an overlooked Assistant Manager in the disgraced Special Sales Department, Ji-yeong possesses a sharp administrative intellect and an unshakeable moral core. Recognizing Ji-hyeok’s true brilliance early on, she aligns herself entirely with his crusade, quickly rising to become the Operations Manager of the elite Special Headquarters. She serves as the administrative backbone of Ji-hyeok's high-speed corporate takeovers. Powers: Master-level corporate administration, forensic accounting, high-pressure negotiations, crisis communication, and internal intelligence gathering.

The former Vice Chairman of Taesung Group's Finance Division and Ji-hyeok's treacherous uncle. Consumed by jealousy and an inferiority complex under Chairman Kang Ok's shadow, Kang Heon orchestrated massive embezzlement schemes, paper company networks, and illicit alliances with foreign syndicates to secure the throne. His arrogance leads to his total financial and physical dismantling when Ji-hyeok launches a surprise corporate purge. Powers: Financial manipulation, political corruption networks, institutional authority, white-collar extortion.

The lethal General Manager of Mirae Security, operating as the black-ops spearhead for Taesung’s primary corporate rival. Han-yong specializes in corporate espionage, political assassinations, and violent containment. He views corporate warfare purely through the lens of attrition and tactical extermination, making him one of Ji-hyeok’s most dangerous physical threats. Powers: Advanced paramilitary combat, tactical ambush execution, counter-intelligence, marksmanship, assassination methodology.

The ruthless head of Ito Co., Ltd.’s Korean branch and a senior operative of Japan's secretive Sangcheon organization. Cold, patient, and thoroughly brutal, Matsui seeks to acquire the Bongmyeongseo to subjugate Taesung Group from the shadows and establish foreign syndicate dominance over Korean financial markets. Powers: International syndicate command, tactical logistics, yakuza enforcement, armed melee combat.

The trusted Head of Facility Management at the ancestral Taeseongwon estate. Harboring hidden greed and feeling unappreciated after decades of service, he turns traitor, selling his loyalty to the Sangcheon organization. During the climax of the succession crisis, he murders internal security guards and takes Chairman Kang Ok hostage in a desperate bid to extort the Bongmyeongseo. Powers: Estate security clearance access, close-quarters ambush tactics, armed hostage manipulation.

The arrogant CEO of Taesung Card and a vital pawn in Kang Heon’s financial cabal. He weaponized company assets to fund private slush funds and illegal credit facilities, only to be utterly humiliated and legally crushed when Ji-hyeok raided his headquarters with unannounced audit teams. Powers: Executive card division authority, financial paper-shuffling, corporate obfuscation.

Ancient spiritual entities within the Draconic metaphysical realm. They guide the consciousness of Lune Eclipse through his early hatchling development, teaching him the balance of soul energy, the taming of Demon Realm flora, and the execution of fundamental word magic prior to his sovereign slumber. Powers: High-tier ancient magic, draconic physiology cultivation, spiritual warding, elemental dominion.