Daigo is the prince of Yafutoma and brother to Moegi.
He was exiled to Tenkou Island, but later resumes his royal duties after saving his land from the Valuans. Throughout the game, he helps Vyse and his friends with their problems, aiding them with his Yafotuman navy. At the end of the game, he becomes the king of his land. Daigo acts casual but also determined and loyal to his country.