Answer:
Self-assurance
Step-by-step explanation:
The fact that Beowulf refuses to use weapons is a way in which the hero is able to show his self-assurance. Beowulf is clearly convinced of his abilities, and he seems confident about being able to defeat Grendel without the use of any weapons. This is one of the characteristics that make him a hero, as he is sure of his success and confident of his abilities.