The legendary hero known for his derring-do and bravery in Norse sagas is Sigurd, also called Siegfried in Germanic legends. Sigurd is most famous for his slaying of the dragon Fafnir and his quest for the golden treasure that Fafnir guarded. His character embodies the archetypal hero's journey, filled with extraordinary feats, battles, and even betrayals. Sigurd's legacy highlights the themes of courage, destiny, and tragic love, particularly in the context of the Nibelungenlied, demonstrating his impact on Norse and broader European mythology.