Who is Sean Courtney from When the Lion Feeds and what is their importance?

Twin to Garrick Courtney, Sean is a self-assured and strong-willed young man. His confidence emboldens him in ways that sometimes get him into trouble, but he is intelligent and can back up his forward attitude. Cocky in his youth, he never shies away from conflict, even encouraging it at times. When a hunting accident causes his brother to lose a leg, his guilt is so great that he often finds himself doing both their chores, but he does so without complaint.