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Yuma Sai is one of the main characters in the Shugyoku Den light novel. Bully-turned-friend, Yuma plays a significant role opposite his former rival, Tamahome, as well as his adoptive sister, Fuka.


During the raids by the Kutou gorilla army, Yuma loses both of his parents and is left cold and bitter by the incident. He meets Fuka when they are both taken in by an abusive farm family in Hakuko. He develops a sense of protectiveness over her which later turns into affection. Fuka's wild and honest behavior pairs well with his proud yet cautioned demeanor.

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Throughout his rough childhood, one of the only things that keeps him going is the Legend of Suzaku. He and Fuka live in hope that, with the power of the Priestess and seven Celestial Warriors, Suzaku will save Konan. When Yuma meets Tamahome and learns of his celestial destiny, he relentlessly bullies him, jealous of the power he could never obtain.

Throughout his journey with Tamahome, Yuma grows to respect his rival and, after a few jealous outbursts, acknowledges him as a brother. This acceptance of Tamahome gives him the courage to sacrifice himself in the face of danger, just as a Celestial Warrior would have done.


In the beginning, Yuma and his gang of bullies terrorizes Tamahome from a young age. Scared of his unusual mark on his forehead, the neighborhood boys come up with a nickname for the future Suzaku Warrior: “Ghost” or “Ghost Boy.” This nickname stuck and is later be mentioned in the Original Series by Tokaki.

Fuka and Yuma

Years later, when Tamahome decides to head to Eiyou in search of a larger income for his family, Fuka goes off after him. The two are then found by Yuma, who, after some objections, agrees to travel for Fuka's sake. When they reach the capital, the two boys turned their endeavor into a competition to see who could raise the most money (therefore settling their rivalry). This could explain how Tamahome strengthened his economic prowess seen in the Original Series.

Yuma protecting Tamahome

When the trio encounters a Kutou sorcerer by the name of Mimadou, Tamahome finds himself one of his targets. After Yuma figures out that Tamahome's employer plans to betray him to the sorcerer, he reveals his plot and earns Tamahome's trust.

Hearing that Fuka has been kidnapped by Mimadou's men, Yuma and Tamahome search for their friend. After the two have a heart-to-heart about their feelings towards Fuka, Yuma is led by Fuka's singing to her and he gives her a Shugyoku jewel, which symbolizes his love for her. But he is quickly put under Mimadou's control and, when Tamahome comes to find him, he attacked his friend.

Yuma's sacrifice

After an intense battle, Yuma breaks free from the spell and sacrifices himself to save Tamahome and Fuka. Though his wounds appear to be fatal, he survives, a testament to his strength that he never truly showed Tamahome. He and Fuka, who is impressed by his development, then travel back to Hakuko to start a home, feeling content in Tamahome's progress as a Celestial Warrior-In-Training.

By the time of the Original Series, the couple is living peacefully in their cottage while their friend continues to make a living in the capital.