Zhang Liao eventually saw the error of his ways and turned on his master. Receiving a fatal blow for his troubles, he collapsed and was dying. Ryou held him close, and then they appeared, the four spirits of the other original Dairangers. They had come for him, to tell him they forgave him. He passed on the ancient knowledge of Dairen'oh to the new Dairangers before he died.
Six thousand years ago, he was the leader of the Dairanger and pilot of the red dragon, RyuSeiOh. Tainted by the war and lured by the promise of power and longevity, he became the Gorma High Priest Saw's subordinate. In exchange for power, he led his four teammates into a trap costing their lives. About twenty-three years or so before 1993, he met a beautiful woman and married her. She gave birth to Ryo and Youko, and for five years they were very happy together. But then he was called back to the Gorma. So he faked his death and left them. He took with him only a photograph of his wife and children. He did not phathom that his son would become the Ryuuranger. Kaku kept the secret about the father and son until he had to reveal it to save them both. Chouryou was then sent to either retrieve Kaku or kill him. Chouryou captured Rin, Kazu and Daigo along with the High Priest Saw, leaving only a frightened Shouji to relay the message to Kaku.
Ryou tricked Shouji into opening the door to the closet Kaku locked him inside and went after him. Doushi Kaku met Chouryou in battle, and was holding his own decently until distracted by Ryou getting attacked trying to rescue the others. Kaku was injured, and Ryou was captured and beaten by Chouryou. The warrior was ready to kill the most beloved of Kaku's apprentices until Kaku shouted the fact that Ryou was his son. Chouryou saw his wife's eyes in Ryou's eyes and knew it to be true. So he just turned and walked away. Ryou couldn't handle the fact that this traitor slaughtered his own team member and was his supposedly dead father. Although Ryou implored to know how the man who loved his mother could possibly be the same person, Chouryou made no attempt to explain himself. He did leave with Ryo the photograph that was his last relic of his short life as a father and husband. Doushi Kaku was safe, but the Dairanger had to fight High Priest Saw. And that one managed to take them all and was going to kill them. Injured and knowing he would probably die soon, Ryou called for his father. And eventually Chouryou could bear no more. He turned on his master and attempted to kill him. Receiving a fatal blow from High Priest Saw, he collapsed and was dying. Chou Ryou apologized to his son and hoped his wife and daughter could forgive him. Ryou held him close, and the spirits of the four original Dairanger come for him, to tell him they forgave him. He, and the other four, passed on ancient knowledge to their successors before departing this world. And for the first time, the five took their beasts and formed together to destroy High Priest Saw. Ryou had to say goodbye to the father he barely knew.
- Mythical Chi Beast
- Mythical Chi Beast RyuseiOh / Mythical Chi Warrior RyuseiOh
- Aura Changer
- Star Sword
- Star Cutter
- Dairen Rod
- Sekiryu Double Dragon Swords
- Heavenly Treasure Lai-Lai Jewels
- Great Wheel Blade
- Red Kiber 1
- Dragon-Fist attacks
- Heavenly Fire Star Lightning Blaze Destruction
- Heavenly Fire Star Blaze Destruction
- He is named after a military general of China in the years 169 to 222.
- Ryo of the Heavenly Fire Star - his son and successor as Ryuuranger.
- Ryo's grandson - his great-grandson and successor as Ryuuranger.