The hero known for battling the dragon in Norse tales is Sigurd (or Siegfried). In the epic saga of the Völsungs, Sigurd embarks on a quest to slay the dragon Fafnir, who hoards a vast treasure. Sigurd's triumph over Fafnir not only showcases his bravery and prowess but also aligns him with themes of heroism, fate, and transformation. This tale illustrates the archetype of the dragon-slayer in mythology, signifying courage and the quest for glory and wealth.