Morgan

Captain Morgan (モーガン大佐 Mōgan Taisa), called "Axe-Hand Morgan" (斧手のモーガン Onote no Mōgan) since he literally has an axe for a right arm, is the first Marine officer of significant rank to be seen in the series.

When Morgan is first introduced, he is governing over the small island of Shell Town, where his Naval base is located. Yet he is ruling by fear, abusing his rank to make people pay taxes, and even going as far as killing his own men if they do not obey his commands. He has a very spoiled son named Helmeppo, who is just as bad at using his father's rank to get what he wants from the island's inhabitants. This all changes however when Luffy comes to town to help Koby fulfil his dream, and possibly recruit Roronoa Zoro into his crew. After Luffy accidentally breaks a newly finished statue of Morgan, the captain immediately sets after him, confronting Luffy in the courtyard of the Marine base. Morgan is defeated by Luffy without even landing a single blow, though he is finished off by Zoro as Luffy has to deal with Helmeppo holding Koby hostage.

Later, it is revealed in the Captain Kuro Arc that he was the only survivor in an attack by Kuro on a Marine ship, which left him with a broken jaw. He was hypnotised by Jango into believing that he had captured Kuro (actually a lookalike pirate), gaining him immediate fame and possibly setting him on the path to his current obsession with rank and power.

The last that was seen of Morgan in the series was in a chapter title page mini-story, as a prisoner stripped of rank on Vice-Admiral Garp's ship, where both Koby and Helmeppo also happen to be serving. However, he slashes Garp and escapes the ship by using his own son as a hostage. Helmeppo disowns him shortly thereafter and returns to the Marine ship, leaving Morgan alone and drifting the ocean.

He was seen again as a cameo in Jango's Mini-arc taking a nap in the ocean as Jango unknowingly passes him.

The word "Möwe", which appears on Morgan's metal jaw, is German for "seagull."