Infamously slandered across the Jianghu as the depraved "Chaotic Sword Demon," Yoo Hyeol is a stoic, razor-sharp pragmatist whose villainous reputation belies a deeply protective moral compass. Burdened by a completely sealed dantian, Hyeol cannot cultivate internal qi through orthodox means, forcing him to adapt through relentless biomechanical mastery, battlefield deception, and extreme mental fortitude. He disdains the self-righteous morality of orthodox sects, choosing instead to dismantle corrupt institutions from the outside while sheltering his companions from the consequences of a vicious martial society. Combat abilities and traits: Master of soft-style blade principles, physical kinetic redirection, joint manipulation, and weapon improvisation. Possesses extraordinary physical durability capable of withstanding internal energy backlashes. Later temporarily absorbs a cursed demonic fragment, unleashing berserk demonic energy before being stabilized.

Revered as the "Lunar Sword," Baek Seolhwa is the foremost disciple of the legendary Sun-Moon master Yangcheon. Despite her refined, icy demeanor, she possesses terrifying martial lethality and unconditional devotion toward Yoo Hyeol. She refuses the hollow honors of orthodox society, choosing to walk the path of an outcast alongside Hyeol. Her emotional bond with him acts as her sole moral anchor, driving her to risk spiritual corruption or physical annihilation to preserve his life. Combat abilities and traits: Sun-Moon Sword Technique practitioner; commands pure Lunar Sword Qi capable of shattering heavy armaments and bisecting defensive barriers. Knowledgeable in esoteric purification sorcery, which she employs to purge demonic miasma and sever dark spiritual tethers.

Self-styled as the "Poison Phoenix," Tang Hye is an eccentric prodigy of the Sichuan Tang Clan who rejects clan dogmatism in favor of lucrative entrepreneurial schemes and adrenaline-fueled chaos. Beneath her volatile temper and money-grubbing exterior lies a shrewd strategist with an unyielding sense of loyalty. She partners with Hyeol to escape stifling family politics, quickly becoming an indispensable pillar of his entourage. Combat abilities and traits: Grandmaster-level poison compounding, needle throwing arts, concealed trap deployment, and Sichuan Tang Clan hidden weapon techniques. Highly resistant to lethal neurotoxins and miasmic arts.

The megalomaniacal patriarch of the Zhuge Clan, Zhuge Gang epitomizes the corruption rotting the Murim Alliance. Masking ruthless ambition behind intellectual prestige, he conducts unspeakable human experimentation to awaken the dormant power of the Heavenly Demon. Convinced that supreme power alone guarantees clan survival, he views family members and captives alike as disposable conduits for dark ritual ascension. Combat abilities and traits: Zhuge Clan strategic formation arts, high-tier internal cultivation, manipulation of the Cursed Dragon Scale, and blood-sacrifice enhancement rituals.

A high-ranking Bishop of the Demonic Cult's covert Dark Shadow Pavilion, Myriad Faces is an insidious infiltrator who delights in psychological destabilization and structural subversion. Viewing the Central Plains factions as cattle ripe for harvesting, she executes operations with theatrical precision, systematically replacing figures of authority with phantom duplicates to engineer catastrophic internal collapse. Combat abilities and traits: Master of skin-shifting disguises, voice mimicry, mental illusion arts, and dark demonic manipulation. Employs cursed soul fragments to forcefully corrupt or detonate the dantians of her targets.

A towering, battle-hardened princess of the Northern Great Khanate, Cthulun marches south driven by imperial conquest and a relentless quest to claim a warrior worthy of being her husband. Unaccustomed to Central Plains social etiquette, she approaches courtship and diplomacy with aggressive physical domination, sparking immense chaos upon crossing the northern border. Combat abilities and traits: Monstrous superhuman strength, northern steppe wrestling arts, immense resilience against blunt trauma, and high-impact kinetic aura strikes.

Hyeol's enigmatic and elusive master, historically feared throughout the martial world as the "Everlasting Heart Sword." Maintaining an unassuming persona in her later years, Muyeong is a living legend whose past is soaked in the blood of both orthodox champions and heretical warlords. She deliberately restricted Hyeol's dantian to force him to achieve unparalleled physical martial comprehension before unlocking destructive qi arts. Combat abilities and traits: Legendary swordmaster; commands the peerless Everlasting Heart Sword Arts, capable of cutting through formless concepts and internal energy flows with supreme precision.

A revered Grand Elder of the Sichuan Tang Clan and an elite member of the renowned Fourteen Heavenly Stars. Despite his immense status, Dang Hwa possesses an eccentric, unpredictable disposition. He tracks Tang Hye to curb her renegade behavior, only to find himself entangled with Hyeol, whose connection to Muyeong compels Dang Hwa to reveal critical historical truths regarding the Everlasting Heart Sword. Combat abilities and traits: Apex-tier poison refinement, Thousand Hands Buddha hidden weapon arts, and Transcendent Realm internal cultivation.

A runaway noblewoman turned chaotic fugitive who forcefully inserts herself into Yoo Hyeol's company as an unwanted tenant and aspiring disciple. Clumsy yet relentlessly determined, Son Yang provides comedic domestic friction while gradually evolving into a resilient auxiliary member of the household. Combat abilities and traits: Intermediate sword basics, high agility, exceptional comedic pain tolerance, and makeshift tavern management skills.

Celebrated as the "Divine Dragon," Ha-Woon is the golden standard of orthodox young masters. Noble, proud, and driven by an uncompromising martial code, he seeks out Yoo Hyeol to test the legitimacy of the "Chaotic Sword Demon" moniker, ultimately gaining immense respect for Hyeol's qi-less combat supremacy. Combat abilities and traits: Peak-level Dragon-Ascension internal energy techniques, orthodox longsword expertise, and high-velocity aerial footwork.

A mistreated scion of the Zhuge Clan, held captive by Zhuge Gang to serve as an organic catalyst for forbidden blood rites involving the Cursed Dragon Scale. Rescued during Hyeol's assault on the clan compound, she serves as living testimony to the orthodox sect's monstrous atrocities. Combat abilities and traits: Deep innate sensitivity to dragon-lineage artifacts and latent formation theory knowledge.

A ruthless bandit chieftain operating under the Green Forest banner, known for ambushing trade caravans and taking high-value hostages through overwhelming brute force. He makes the fatal error of targeting a caravan accompanied by Yoo Hyeol and Muyeong. Combat abilities and traits: Heavy cleaver combat forms, bloodthirsty brawling style, and brute external muscle reinforcement.

The battle-scarred manager of the underground gambling den at Paengwol Inn. Corrupt and violently possessive, he illegally confiscates masterwork armaments from indebted martial artists until Hyeol and Seolhwa dismantle his gambling ring to reclaim the Sun-Moon Sword. Combat abilities and traits: Deceptive dice manipulation, weighted club martial arts, and underhanded brawling tactics.