A boy raised by the Knight Death Scythe, he believes that becoming a great magician will be the best way to repay Death Scythe's kindness. He has a cheerful personality and sometimes runs away or hides, but he never lies. He helped Death Scythe in the resistance against the invasion of the Genesis Army's OZ World.

Duo's magical powers increased after his battle with OZ World, and he received a fateful revelation. Sensing the magical power of the Wizard Nu, Duo heads for the land of Argus.

In the Argus Kingdom, Duo obtained the Staff of Owl. His entire body is filled with the magical power of Wizard Nu, and its light bullets are powerful enough to immobilize subordinate soldiers with a single hit.

The strength of his bond with the guardian deity Death Scythe has brought about the evolution of the Staff of Owl. Duo himself has awakened the latent abilities of Wizard Nu, and he has become a member of the New Argus Knights.