Koby was one of the first characters introduced in One Piece, right from the second chapter. He dreamed of joining the Marines, hoping to do good in the world – quite the opposite of Luffy, who dreams of becoming the Pirate King. Luffy’s determination to achieve his goal ignited a fire in Koby, reigniting his desire to join the Marines, and he grew from a whiny pink-haired cabin boy to a Marine captain.
In chapter 1059, Koby makes his return to the story which picks up in the middle of his assault on Amazon Lily. After the Shichibukai system was abolished by the World Government, its forces were sent around the world to capture the great corsairs. Koby was chosen to capture Pirate Empress Boa Hancock – a feat that proved far too difficult for him to pull off.
During the battle, the untimely arrival of the Blackbeard Pirates complicated matters considerably for Koby, who was trying unsuccessfully to negotiate a surrender from Hancock, with the promise that Marine forces would leave his island if she came quietly. Hancock and Blackbeard fought to a stalemate, but their fight ended with Blackbeard’s hand around his throat. Hancock had turned the island’s Marines and Blackbeard’s crew to stone with his Devil Fruit abilities and claimed that killing her meant they would be locked in stone forever.
As Koby struggled to find a solution, Rayleigh arrived on the island just in time to stop the battle, just as Shanks had done in the Summit War two years before. He was able to settle the matter peacefully, using his reputation as the only threat, later stating that he couldn’t quite defeat Blackbeard if that were to happen. Part of this peaceful resolution appears to involve Koby, who has since been kidnapped by Blackbeard. It’s unknown what use Blackbeard makes of Koby, but it’s likely related to a little comment Blackbeard made after he arrived.
A mystery in the history of One Piece is something called the Rocky Port incident. Nothing is known about Rocky Port, let alone the incident, except that Trafalgar Law is the instigator, Koby is the supposed hero of the events that unfolded, and Blackbeard is grateful to Koby for what he did there.
Whatever happens to Koby is sure to be exciting, as fans have pointed out the similarities to his introduction in the story. Once an unwitting member of the Alvida Pirates and saved by Luffy, it would make sense for Luffy to save him from the Blackbeard Pirates, thus saving his own skin once again. Another popular theory is of a possible collaboration with Luffy in the Final War, but with the gap between Koby’s power and Luffy’s seemingly widening as the chapters go by, it seems increasingly unlikely. Many fans hope that Koby will reach the level of Admiral by the end of the series, but first he will have to escape the clutches of the Blackbeard Pirates.