Jomy is a student born in the Education City Ataraxia. However, he is actually a psychically gifted individual, of the race known as Mu. On the day of his adulthood exam, he is rescued from brainwashing by Soldier Blue. Later on, Jomy's dormant powers awaken, and he is confronted with the realization that he is one of the strongest Mu, and the only hope his race has for continued survival.

Unlike most Mu, who suffer disabilities, Jomy has a healthy body. He originally rejects the idea of him being a Mu but comes to accept it later on and succeeds Soldier Blue as leader of the Mu.