Born with the soul and blood of a dragon, but body of a mortal.
The "Dragonborn" (Dovahkiin, in the Dragon Language), is the main character in The Elder Scrolls V: Skyrim. At the start of the game the Dragonborn is a prisoner, captured while attempting to cross the border into Skyrim. While being transported to the settlement of Helgen, the player discovers that one of their fellow prisoners is Ulfric Stormcloak, leader of the rebellion. Apparently to make a point, Imperial General Tullius sentences all the prisoners to death, but a dragon attacks Helgen before the Dragonborn is executed, allowing the Dragonborn a chance to escape.
The Elder Scrolls V: Skyrim's trailers and concept art depict the Dragonborn as a male Nord with brown hair and a short beard, wearing an Iron Helmet, Studded Cuirass, Iron Gauntlets and Iron Boots.