Sun Wukong's master. He has a calm and kind personality. A central figure among the Five Grain Sages, excelling in both physical strength and Hanja magic.

Samjang's master. She possesses powerful magic skills and cherishes her disciples deeply. She is known for having a strong sense of responsibility among the Five Grain Sages.

Resides at the Kong Academy. He has a cheerful personality, is somewhat laid-back, and loves to eat.

To-saeng-won's master. A powerful sage who researches Hanja magic and Magic Crystals in the Land of Darkness. Though he looks like a weak old man, he possesses immense skill.

A master who values academic study and spiritual discipline. He has no disciples.

Sun Wukong The protagonist. He has a strong sense of justice and values his friends. He grows stronger as he learns Hanja magic from Sage Bori. He unleashes powerful Hanja magic using the Yeouipil.

Ok Dong-ja A disciple of the Bori Academy. Though timid, he is kind-hearted and finds courage for the sake of his friends. He learns Hanja magic while adventuring with Sun Wukong and Samjang.

Yeouipil The legendary magic brush. A special weapon that enables the use of powerful Hanja magic. It shares a deep bond with Sun Wukong and plays a crucial role in many adventures.

Samjang A disciple of the Ssal Academy. With a calm and kind personality, she is an important companion to Sun Wukong. She possesses excellent Hanja magic skills and often takes a leadership role in the group.

Demon King Honse Initially Sun Wukong's most powerful enemy. A demon king of immense power, but later helps Sun Wukong against the Great Demon King. In the end, he sacrifices himself, passing his power to Sun Wukong.