Eliwood succeeds his father as the new Marquess of Pherae. Shortly before his ascension, Eliwood speaks with the tactician Mark, asking if he would name his firstborn child and be their godparent. Fifteen years later, that child, Roy, is introduced to the Ostian Marquess Hector's daughter Lilina, and the children run off to play while Eliwood and Hector discuss the recent unrest in Bern since Zephiel's ascension.

Roy's mother passed away at some point in his childhood. His mother's identity is not mentioned in The Binding Blade. Roy is a bookish young man that is eager to learn and suddenly has to fill the role of a leader of the army. He is very collected and formal, as a result of his aristocratic background and being obliged to the role of General. However, despite acting confident in front of his army, inwardly, he often doubts his competence as a leader and soldier. In private he is noted to be more relaxed and even somewhat clumsy, he is known to "dance with two left feet." A competent leader and warrior, Roy is an upstanding, thoughtful, and idealistic young man. While he would prefer to avoid bloodshed, he maintains a strong resolve to see peace return to Elibe.

Despite his inexperience, being younger than his father was when he first set out into battle, he quickly grows in his role of a leader, managing to command an ever growing army gaining people's trust wherever he goes. He is perceptive and cunning for his age – he tricks a traitorous Lycian vassal into exposing himself, suspects that the bard Elffin is more than he seems, even though he does not pursue the truth against Elffin's will, and often reacts calmly and tactically to disturbing news.

He is committed to protecting those in need and fighting for his ideals, even if this means fighting against old allies. Yet he demonstrates empathy, understanding that sacrificing people to prevail is a hollow victory. When his knights try to keep him away from the front lines, Roy refuses to, stating that the only way he can understand people and fight for them is to experience their hardships. Valuing friendship and family greatly, mirroring Eliwood. He has redish orange hair and blue eyes.