Duke Zesto

Who is Duke Zesto?
"While sailing on my ship, which I had set on public, this pirate teleported to me. He looked EXACTLY like my pirate, except he had black hair and wore only undergarments. Yet when he came on board, he walked up to me and told me that he was my alter-ego. He then proceeded to reveal that he planned to destroy me. And when I think about it... my name is LORD Carlisle (first name Alex), and he's DUKE Zesto. As if 'Lord' and 'Duke' isn't enough, his first name starts with the OPPOSITE of mine. The opposite of 'A' is 'Z'." ~ Lord Carlisle

Duke Zesto is a pirate who has only been spotted once, by pirate Lord Carlisle. Little is known about him except for his characteristics, as described in the quote.