Pirates, swordsmen who gradually grow up to liberate the world

(The protagonist is a pirate, a great swordsman, a single female protagonist, not a stud, and has nothing to do with the protagonist group)
He survived countless extreme battles and killed all enemies that stood in his way.
The sword-drawing technique was as fast as lightning and shocked the world.
He is the brother that Nico Robin recognized with tears, the nightmare of the Celestial Dragons, the great enemy of the Navy, and the walking individual Four Emperors.
He is a man who walked out of hell alone at the beginning of the Great Pirate Era.
With long flowing hair, black robe and black hair, he looks unruly.
Everything we do is to overthrow the tyranny and distorted rule of the world government.
Arthas: "Don't listen to their nonsense. I am an upright person. Although I have slaughtered many lives, it is all for the benefit of the sea and for the benefit of you."
……
(Chapter 171, starts drifting alone on the sea, there is a growth period ahead)