One Piece: I Became a Girl and Rose to Become King of the World

[Pirate King + not joining the crew + female protagonist + King of the World] [Should be gender transformation, not gender reassignment] [Slashing sorceress + Rumble-Rumble Fruit in the middle of the story] [The ender of the Celestial Dragons]

After transmigrating into Pirate King as a girl, she got a useless golden finger that gave her nothing but the goal of becoming the King of the World. Fortunately, she had the slashing abilities of Sukuna as a fallback, enough to preserve her moral integrity in this deeply repressive era.

“If you claim to be the world, then this is the slash that cuts the world apart.”

“You call yourselves gods and look down on all living things. Then I shall be your divine punishment.”

Many years later, someone asked Reina, who had become the King of the World, how she had made it this far.

In response, Reina simply smiled.

“When I first set sail, I only wanted to get a little stronger so I could protect myself in the Great Pirate Era. I never thought I’d get this far. I just dealt with a few annoying people, and somehow things turned out this way.”