Final answer:
Hygelac is a heroic character who defeats a dragon.
Step-by-step explanation:
Hygelac is a character from the story mentioned in the question. In the story, we learn that Hygelac is a good champion who enters a door and encounters a dragon guarding a palace. Hygelac shows his bravery and strength by defeating the dragon with his mace. This new trait reveals Hygelac's heroic qualities.