One Piece: Koby Vs. Boa Hancock, Explained

gamerant.com:

One of the most important events in the One Piece world was the dissolution of the Shichibukai system. The seeds for this were planted long before the time skip of the series when Sir Crocodile, one of the former Warlords, tried to run Arabasta into the ground. Thanks to Luffy, the country was saved, however, and the threat that the Shichibukai posed to some countries was made apparent. After the time skip, Dressrosa faced a similar situation with Doflamingo, however, in his case, the country had already suffered for over 10 years.

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Admiral Fujitora made it known that his dream was for the Shichibukai system to be completely abolished. At the Reverie, this idea was put forward and with an overwhelming majority of leaders supporting this proposition, all the Warlords were stripped of their position. Shortly afterwards in One Piece 956, fans saw the aftermath of the abolition of this system. Koby, in particular, was seen on his way to Amazon Lily. According to him, he was on the way to capture the Pirate Empress, Boa Hancock. The question remains, however, does Koby have what it takes to defeat Hancock?

Hancock is an incredibly powerful pirate and this is something that even characters such as Sengoku acknowledge. Just after one voyage as the captain of the Kuja Pirates, she was given the title of Shichibukai and an 80 million berry bounty was slapped on her head, which just goes to show that she is a very rare class of pirate. Being a warrior from Amazon Lily, Hancock is an incredible user of Haki. Her sisters, Marigold and Sandersonia are both users of certain advanced Haki forms, such as Ryuo.

Hancock herself commands the Color of the Supreme King as well and it