One Piece: The Laid-Back Marines Take Down the Roger Pirates

[Marines] + [Haki] + [Devil Fruits]

Xi Yu transmigrated to the world of One Piece twenty years ago.

Before the God Valley Incident, he joined the Marines and rose rapidly through the ranks.

With his own strength, he defeated the newly famous Roger Pirates,

engineered the downfall of the Rocks crew,

captured the young Kaido and sent him to a laboratory to be used as a test subject.

Even Edward Newgate had to give him a thumbs-up whenever he spoke of him.

He was a figure feared by Charlotte Linlin and the other powerful figures of later generations...

From that moment on, his name spread far and wide. He became the pride of the Marines, and pirates everywhere did their best to avoid him!