Koga, Yuna and Aria arrive at Old Five Peaks where they feel a warm and powerful cosmos that is when Haruto appears saying is ShiryЕ« (Omega) Ryuho's father. Later, the young Saint leave a weaken Ryuhou in Shun's care then leaves the village to continue their mission.

Shun takes the youngster to his village to rejoin Ryuhou, afterward they're once again attacked by Miguel, whom they manage to defeat after a fierce battle. Overpowered by the merciless Silver Saint, Koga is saved by the timely arrival of Andromeda Shun, the Saint of legend. Yuna and Souma take Aria away to safety while Koga stays to fight. Ryuho,Koga,Souma and Yuna continue their trek to take Aria to safety, when they're surprised by the attack of Hound Miguel. In the struggle, Micene can break the shell of the Dragon, and leaves Ryuho unconscious. The plan works, but the Gold Saint Leo Mycenae appears to address them. Along Sum and Haruto, Ryuho tower attacks to cause a distraction so that Koga and Yuna managed to infiltrate and rescue Aria. They head to the Sanctuary, but find the Babel Tower erected in its place. Along the Lionet SЕЌma, they find Pegasus KЕЌga and Wolf Haruto, and escape from the school with the help of instructor Geki (Omega). In the tournament, he reached the quarterfinals and fight with his friend, but the tournament is interrupted by the invasion of Martians. Ryuho can qualify for the Battle of Saints, along with Aquila Yuna. He challenges his friend to a duel in order to cause it to obtain control over his Element. Ryuho's goal is to enhance his Cosmo enough to bring his father back to his senses.ДЄfter returning to the Palestra from the Five Ancient Peaks, he meets Pegasus KЕЌga fleeing the school, but the Knight persuades the back of Pegasus. Ryuho received much love from their parents, and so has a good heart and shows great compassion for others. He was raised and trained in the Five Peaks Former by his mother Shunrei, and his father, Shiryu, who despite being deprived of his five senses, was able to communicate through the use of Cosmo. He grew up close to nature and has a big heart, with a wonderful personality. Ryuho grew up in a wealthy family and often Koga and others receive some benefit for it. He received a lot of love from his parents compared to the other saints.Because of this he feels sorry for the others.

Saint seiya dragon