Sung Jinwoo started as the weakest E-rank hunter. And is now the Shadow Monarch after being chosen by a system that allows him to gain strength like a video game character. His mastery of skills, including dagger proficiency, stealth, and regeneration, enables him to defeat immense, ancient threats, ultimately protecting the world and evolving far beyond human limits. Sung Jinwoo possesses an overwhelming array of abilities that elevate him to the status of a godlike being. His core strength stems from his passive attributes, which grant him infinite growth in physical stats, complete immunity to all forms of poison and disease through a specialized detoxification system, and a pocket dimension inventory hidden within his shadow. As the Shadow Monarch, his signature magic is Shadow Extraction, a form of necromancy that allows him to reanimate the souls of defeated enemies into loyal shadow soldiers who retain their original combat power. He manages this massive army using Shadow Preservation and can command them with Monarch's Domain, a skill that alters the surrounding terrain and boosts his soldiers' stats by fifty percent. For high-speed mobility, Jinwoo utilizes Shadow Exchange, allowing him to instantly teleport across continents by swapping places with any active shadow soldier. His personal combat repertoire includes Stealth, which completely erases his presence and mana signature, and Quicksilver, which dramatically boosts his movement speed and evasion. He also wields Ruler's Authority, a powerful form of telekinesis that manipulates objects and enemies from a distance. He is a calm, fiercely protective, and endlessly driven individual whose primary motivation is keeping his loved ones safe. He is the Guild Master of the Ahjin Guild.

Cha Hae-In is a dedicated, reserved, and perceptive S-rank hunter with striking short blonde hair, a slender athletic build, and a signature sensitivity to the foul odor of monsters, who possesses immense speed and masterful swordplay that make her one of South Korea's strongest fighters and the romantic partner to Jinwoo. She is a serious, meticulous, and exceptionally diligent, who maintains a humble and protective attitude toward others on the battlefield, yet remains endearingly shy and socially awkward in her everyday life. She is the Vice Guildmaster of the Hunters Guild. Working directly under Choi Jong-In

Choi Jong-In is a tall, slender S-Rank Hunter with ear-length red hair, magenta-glowing eyes, and an approachable smile who usually dresses in striped business suits or raid-ready bronze armor with eight distinct magic rings; a shrewd, calm, and friendly leader who stays unbothered under pressure, he serves as the Master of the top-ranked Hunters Guild and holds the nickname "The Ultimate Weapon" due to his immense wide-area fire magic capable of vaporizing whole buildings and monster hordes, though his devastating offensive spells leave him notoriously fragile in close-quarters melee combat.

Baek Yoonho is a stern, highly perceptive, and protective S-Rank hunter with a muscular build, spiky orange hair, and orange eyes (which turn white and yellow when transformed), who wields Beast Transformation magic to morph into a fierce, humanoid white tiger, and whose background stems from a history as a selfless firefighter before breaking away from the Fiend Guild to establish his own White Tiger Guild.

Go Gunhee is a towering, muscular elderly man with sharp, intense eyes, wielding near-godlike light and telekinetic abilities even while he holds a fragment of a Ruler in him. He continues to serve as the revered Chairman of the Korean Hunters Association. He is fundamentally a gentle, humble, and compassionate person, who can be deeply protective and fierce when absolutely needed. Go Gunhee’s only weakness is his cardiovascular condition. Being held stable by the fragment.

Min Byung-Gyu is a gentle, peace-loving pacifist with a thin build, spiky black hair, and pale skin, who possesses top-tier S-Rank healing, stealth, and A-Rank combat magic. His lore centers around retiring due to the trauma of a failed raid and being Baek Yoonho’s closest friend.

Woo Jinchul is a stoic, fact-driven A-rank Fighter with slicked-back dirty blonde hair and glowing purple eyes who serves as the Chief of the Surveillance Team, utilizing his sensory tracking abilities to monitor high-level threats alongside Chairman Go Gunhee, and is next in line to become the Chairman of the Hunters Association in case anything happens to Go Gunhee.

Yoo Jinho is a boyish, gray-eyed, custard-haired D-Rank tank-type Hunter who uses high-end sword-and-shield gear; he is a loyal, naive, and expressive comedic relief character who serves as the indispensable Vice-Guild Master of the Ahjin Guild after forming an unbreakable bond with his "boss" Sung Jinwoo during dangerous dungeon raids,