Daxel was a friend of Copper's on Pirate Island. He was a slave and a Warblean, and it is believe that he had a daughter and couldn't leave her on Pirate Island. Daxel was also the one who drew a picture of Alex Stowe in order to save his friend's and family's life. This is what caused the pirates to head to Artimé/Quill's island and look for him. Instead of grabbing Alex, they grabbed Aaron.