The Hero of Oakvale is the player character and main protagonist of the game. He is first introduced before the beginning of the main storyline, as a child trying to find enough money to buy his sister Theresa a birthday present. The Hero is the child of the heroine, Scarlet Robe, and continues the ancient bloodline of the rulers of The Old Kingdom, the Archon. This makes him the most powerful hero in the game and master of the three hero traits of strength, skill and will.
Source: Wikipedia, "Fable (video game series)," available under the CC-BY-SA License.