"Axe-Hand" Morgan is a former Marine captain, the father of Helmeppo and the first significant Marine officer to appear in the storyline. After his defeat by Monkey D. Luffy and Roronoa Zoro, he was stripped of his rank for his many abuses of power. He is the third antagonist of the Romance Dawn Arc, serving as the main antagonist of the Shells Town subsection. He is also the main antagonist of the Diary of Koby-Meppo cover-page serial.