Sung Jinwoo was once the World's Weakest E-Rank Hunter, but after the Double Dungeon incident, he was chosen by the 'System' and gained the unique ability to level up alone. Through constant growth, he inherited the power of the Shadow Monarch to become the world's strongest Hunter. Driven by a strong sense of responsibility, he stands against all enemies to protect his family and comrades.

Choi Jong-in is a representative S-Rank Hunter of South Korea and the Guild Master of the Hunters Guild. A top-tier mage who wields powerful fire magic, he leads large-scale battles with overwhelming firepower and brilliant strategy. He is a leader trusted by his guild members for his calm judgment and sense of responsibility.

Cha Hae-in is a South Korean S-Rank Hunter and the Vice Guild Master of the Hunters Guild. A top-tier swordsman with exceptional swordsmanship and quick combat instincts, she possesses a strong sense of justice and responsibility. She has a unique constitution that makes her sensitive to the scent of mana from monsters, and she is a key figure who trusts Sung Jinwoo and grows alongside him.

Ma Dong-wook is a South Korean S-Rank Hunter and a tanker-type warrior boasting exceptional defense and overwhelming physical strength. Based on his robust body and extensive combat experience, he protects his comrades on the front lines and calmly leads the battlefield even in crisis situations. He is highly trusted by many Hunters for his excellent responsibility and leadership.

Baek Yoonho is a South Korean S-Rank Hunter and the Guild Master of the White Tiger Guild. He suppresses enemies with overwhelming power and agility using his beast-type transformation ability and possesses sharp combat instincts. Despite his rough appearance, he has a strong sense of loyalty and responsibility, cherishing his guild members and acting as a reliable leader.

Lim Tae-gyu is a South Korean S-Rank Hunter and a top-tier archer. Based on his exceptional eyesight and precise marksmanship, he hits targets with powerful mana arrows even from long distances, serving as a core force providing rear support on the battlefield. He is evaluated as a skilled Hunter with a calm personality and excellent judgment.

Go Gunhee was the Chairman of the Hunter Association and a brilliant leader who guided the South Korean Hunter society. Though gentle and cautious by nature, he showed a stronger sense of responsibility than anyone else when it came to protecting the nation and its people. He was once one of the strongest Hunters, possessing immense mana and overwhelming combat capabilities. Furthermore, his body housed the power of a Ruler, giving him potential far beyond that of an ordinary Hunter. Although he could not exert his full prime strength due to aging and declining health, he earned the respect of many by fighting and sacrificing himself for humanity until his final moment. His courage and dedication remain a part of South Korean Hunter history.