What are some leadership qualities of Arthur's? Examples?

Arthur doesn't have a very large part in this story. We initially meet him in the beginning when the Green Knight crashes his celebratory feast durung the holidays. Because he is a good King and leader, Arthur steps forward to accept the Green Knights challenge..... Gawain steps in.

At the end of the story, Arthur wears a green girdle in honor of Gawain's accomplishments.