Byleth

Byleth, also known as Bereto/Beresu in Japanese, is the protagonist of Fire Emblem: Three Houses. As an avatar character, their gender, name, and birthday are customizable by the player. In the game, they serve as a professor at the Garreg Mach Monastery Officers Academy and are also a skilled fighter. Byleth possesses the mysterious Crest of Flames and can wield the Sword of the Creator. They have a complex background, losing their mother at birth and being taken away from the monastery by their father, Jeralt, to become a mercenary. During an escort mission, Byleth encounters Edelgard, Dimitri, and Claude, gaining the power to rewind time from a mysterious girl named Sothis. Later appointed as a professor at the academy, Byleth can choose to lead the Black Eagles, Blue Lions, or Golden Deer House. As the story unfolds, Byleth becomes involved in the war of Fódlan, and their choices directly impact the future of the continent. They are known as the 'Ashen Demon' due to their bravery in battle. Byleth also appears as a playable character in Fire Emblem Warriors: Three Hopes.