After Morgan was promoted from chief petty officer to the rank of lieutenant commander for reportedly capturing the infamous "Kuro", and then made his way up to the rank of captain, he became corrupted with his new found fame and tyrannized the entire 153rd Branch and the town associated with it for three years, with his son Helmeppo taking advantage of this.
Their reign of terror came to an end when Luffy and Zoro defeated him. Then he was dismissed and the control passed to Commander Ripper. Coby and Helmeppo were part of the staff of this base until the transfer of Morgan to Garp. During this, Morgan was able to escape and Coby and Helmeppo went under Garp's command and tutelage.
|Rokkaku||Lieutenant Junior Grade||Active|
- ↑ SBS One Piece Manga — Vol. 8 (p. 84), Oda explains the organizational structure of the Marines.
- ↑ SBS One Piece Manga — Vol. 6 (p. 124), fan question: Is the man who captured fake Kuro from Chapter 37 Captain Axe-Arm Morgan?
- ↑ One Piece Manga — Vol. 63 Chapter 616, cover story: From the Decks of the World Vol. 4, Rika is shown after the timeskip.