For the Duelist, I had the idea that it could be fun for a swordsman to challenge another for ownership of the sword. Much like a pink slip for a car. So to have him carrying the trophies like a peacock jumped out at me. I also thought it would be great for him to size up an opponent and handicap them by choosing a specific sword to counter the right technique. We didn't get to cover this in the show, but it was behind the character.
When I designed him. I wanted him to stand out amongst the people of the town so he's more official, almost military. I based him on the idea of a hybrid Lee Van Clef meets Vincent Price as a muppet. I figured he's more of a indigenous species of third earth.