Sakamoto Ryouma is a Rider-class Servant in Fate/Grand Order from the historical figure who played a key role in the Meiji Restoration. Summoned with his wife Oryou as a single entity due to their strong bond, he appears as a tall man with long hair, often accompanied by his oni wife. Known for his vision of Japan's modernization and efforts to unite anti-shogunate forces, he embodies a free-spirited revolutionary spirit. In Chaldea, he is friendly, optimistic, and deeply devoted to Oryou, treating her as an equal partner in battle and life.