The Eldest Young Master of the renowned Luoyang Sword Family. In his original timeline, So-hyeon endured the slaughter of his bloodline, horrific personal torture, and a lifetime stigmatized by the pejorative title of the "Swordless" heir. Binding his soul to a dark supernatural contract, he regressed to his seventeen-year-old self determined never to be helpless again. Cold, pragmatic, and fiercely calculated, So-hyeon conceals his true abilities behind an unassuming facade while methodically operating in the shadows under the monikers of the "White Mask," the "Dark Heaven Venerable," and the "Ruler of Darkness." His driving motivation is the absolute protection of what remains of his lineage and the ruthless extermination of anyone threatening his future. Powers: Master of the Jeam Jincheon Scripture (Dark Heavenly Scripture), allowing him to harness abyssal cosmic demonic qi. He possesses unmatched internal force manipulation, precise meridian disruption, lethal unarmed martial arts, and advanced sword concepts. Through his dark domain manipulation, he can manifest psychological terror fields and temporal nightmare constructs that trap an opponent's consciousness within infinite execution illusions.

Originally an unassuming servant assigned to the disregarded Wongak Pavilion, Jeong-ah quickly sets herself apart through quiet stoicism, steel resolve, and an innate sense of martial perception. Subjected to So-hyeon's grueling tests of fealty, she displays unwavering loyalty, refusing to betray her master regardless of political intimidation or danger. Recognizing her untapped potential and unshakeable dedication, So-hyeon takes her under his wing, actively restructuring her destiny from that of an ordinary maid into his foremost lieutenant and blade. Powers: Carrier of the legendary, unawakened Dragon Eyes constitution, which grants supernatural kinetic vision, battle anticipation, and instinctive reading of martial forms. Following So-hyeon’s internal energy intervention to unblock her clogged meridians, she gains explosive qi flow and high-speed martial aptitude, laying the groundwork for high-tier swordsmanship.

The sinister commander within the Black Bone Sect and the covert matron of Hyeonwol Pavilion. Operating beneath the glamorous guise of Se Yuhwa, she is an ancient, parasitic martial artist who sustains her youthful appearance and enhances her internal reservoir through horrific blood sorcery rituals and the mass slaughter of innocent captives. Vain, sadistic, and utterly convinced of her supremacy within the Luoyang underworld, her arrogance blinds her to the true nature of the calamity approaching her syndicate until it is far too late. Powers: High-level demonic blood arts, flesh-refining sorcery, and lethal needle and thread techniques. She is capable of absorbing the life-force of hundreds of human sacrifices to dramatically surge her combat aura, creating corrosive blood miasmas and skin-rending shockwaves.

An elite, hyper-perceptive female bodyguard serving the Luoyang Sword Family, officially stationed to observe and protect the supposedly frail and incompetent Eldest Young Master. Sharp-eyed, dutiful, and bound by martial ethics, Gyu senses the subtle shift in Wongak Pavilion's atmosphere following So-hyeon's regression. While outwardly maintaining the posture of a loyal family retainer, she continuously gathers intelligence, trying to reconcile the image of the "Swordless" invalid with the terrifying phantom vigilante currently dismantling Luoyang's criminal underworld. Powers: Expert practitioner of orthodox Luoyang sword styles, high-tier light-body arts (Qinggong), stealth detection, and keen sensory tracking capabilities.

The late mother of Yeon So-hyeon, remembered throughout the martial world as the saintly "Medicine Buddha." Blessed with profound medical arts and boundless empathy, she spent her life saving martial artists while seeking to insulate her son from the blood-soaked destiny of the Murim. Aware of the dark omens surrounding his fate, she sacrificed her vitality and life expectancy to suppress his cursed fate, extracting from him a solemn childhood vow never to wield a sword - a vow that inadvertently rendered him powerless in his first life. Powers: Transcendent-tier medical cultivation, divine acupuncture, esoteric poison cleansing, and profound vital energy transfer abilities.