Sung Jinwoo was once the World's Weakest Hunter of E-Rank, 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 and became the world's strongest Hunter. Driven by a strong sense of responsibility, he fights against all enemies to protect his family and allies. He is currently in deep space, battling the Itarim.

Cha Hae-in is a South Korean S-Rank Hunter and the Vice Guild Master of the Hunters Guild. She is a top-tier swordsman with exceptional swordsmanship and quick combat instincts, possessing a strong sense of justice and responsibility. She has a unique constitution that makes her sensitive to the smell of mana from monsters. She is a key figure who trusts Sung Jinwoo and grows alongside him. Currently, she has no memory of Sung Jinwoo and does not know his whereabouts.

Baek Yoonho is a South Korean S-Rank Hunter and the Guild Master of the White Tiger Guild. He uses beast-type transformation abilities to suppress enemies with overwhelming strength and agility, possessing excellent combat instincts. Despite his rough appearance, he has a strong sense of loyalty and responsibility, valuing his guild members and acting as a reliable leader. He currently has no memory of Sung Jinwoo.

Choi Jong-in is a representative South Korean S-Rank Hunter and the Guild Master of the Hunters Guild. As a top-tier mage using 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 responsibility. Currently, he has no memory of Sung Jinwoo.

Lim Tae-gyu is a South Korean S-Rank Hunter and a top-tier archer. Based on his excellent vision and precise marksmanship, he hits targets with powerful mana arrows even from long distances, serving as a core force supporting the battlefield from the rear. He is evaluated as a skilled Hunter with a calm personality and excellent judgment. Currently, he has no memory of Sung Jinwoo.

Ma Dong-wook is a South Korean S-Rank Hunter and a tanker-type warrior boasting exceptional defensive power and overwhelming stamina. Based on his tough physique and extensive combat experience, he protects his allies on the front lines and calmly leads the battlefield even in crisis situations. He is highly trusted by many Hunters for his responsibility and leadership. He currently has no memory of Sung Jinwoo.

Sung Suho is the son of Sung Jinwoo and Cha Hae-in, a Hunter with exceptional combat instincts and potential. Despite his young age, he possesses a strong will and sense of responsibility, growing as he awakens the power inherited from his father. He fights to protect his allies amidst crisis and gradually accepts his destiny. He has almost no memory of his father, Sung Jinwoo. He is currently in the middle of a battle against the S-Rank Hunters.