Chapter 521

Coverstory Summary
CP9's Independent Report vol. 27: "Pursuers Arrive to Capture CP9"

Captain Very Good of the Marines intends to capture the rogue agents.

Plot Points

 * Marguerite, Sweet Pea, and Aphelandra are turned back to normal.
 * Hancock reveals that the marks on her and her sisters' backs were branded by the World Nobles, and that they were enslaved by them when she was 12 years old.
 * Four years after they were enslaved, the Sisters along with thousands of slaves of different races including Fishmen, were freed by a Fishman who climbed the Red Line to Mariejois named Fisher Tiger.
 * Fisher Tiger had took the freed Fishmen slaves and formed the Sunny Pirates by rebranding the mark of the Tenryubito into a mark of the sun.
 * This mark of the sun is what appears on Hatchan's forehead and Arlong's chest indicating that they were former members of the Sunny Pirates, although they weren't slaves since their marks are only tattoos.
 * During their time as slaves Hancock was fed the Mero Mero no Mi and her sisters the Hebi Hebi no Mi. Because of this they were able to trick the everyone else with their abilities and fake Gorgon story in order to hide their past.
 * Elder Nyon reveals that it was her that took the Sisters in raised them and brought them back to Amazon Lily.
 * Hancock happily agrees to let Luffy use a ship to leave.

Anime episode
Episode 415