Voice Actor: Matthew Mercer (https://www.youtube.com/watch?v=Ht2ka53N3FY)

Ryoma is the eldest son of Sumeragi and Ikona and the eldest child of four in the Hoshidan royal family. When Sumeragi married his second wife Mikoto, Ryoma helped the nation to warm up to the new queen by establishing a strong relationship with his new step-mother. Ryoma also recognised Mikoto's birth child, Corrin, as his new sibling. However, Ryoma lost this sibling when they were kidnapped as an infant and raised in Nohr.

In line with his position as the direct successor to the helm of Hoshido, Ryoma cuts a figure of calm collectedness, keenly scrupulous as he rigorously analyses the innumerable situations that he finds himself mired in before finalizing any decisions. This greatly contributes to this aura of charisma and wisdom that he is known to exude, one that sees many turning to him for his sagely advice in his support conversations. Adept in the art of war, this, combined with his shrewd sense of insight and intelligence, has helped Ryoma to lead the Hoshidan army to victory in the campaigns that they have participated in. Further complementing his astute skill as a battle tactician is that of his skill with the sword, one that is regarded to be unparalleled throughout the kingdom of Hoshido. In his spare time, Ryoma often meditates to keep himself calm.

Consequently, due to Ryoma seemingly appearing to be perfection incarnate, both his brother and son feel insecure and inferior to him. Despite this, Ryoma cares greatly for his siblings, having a strong bond with each of them. Despite not being his sister, he also is protective of Azura as well. Even Corrin is a person of great importance to him, even after years of separation and expresses nothing but joy in their reunion despite being the only one of the Hoshidan siblings to know that they are not his sibling by blood. However, his duty to his nation and his family can overrule these feelings if he believes that they have betrayed them, most notably in Conquestwhere he is lead to believe that they killed Hinoka. However, in Birthright and Revelation, he expresses complete confidence in Corrin leading their armies, being a wise consort to them during their campaign.

His undying will makes him the last one to give up out of everyone in the army.