One Piece: This Marine Seems More Like a Villain Than the Four Emperors

Kyle transmigrates into the world of pirates and, from the start, witnesses civilians being slaughtered. On the brink of death, he awakens the [Sin Value System].

As long as he can see someone's sin value and send them to the afterlife by force, he can absorb the power of their sins and grow infinitely stronger!

Thus, the Marines gain a “cleaner” with an utterly deranged style.

At Marine Headquarters, in the military court.

Fleet Admiral Sengoku stares at the files of senior officers strewn across the floor, veins bulging on his forehead. “Colonel Kyle! An East Blue branch captain, a Grand Line base commander, even an officer of the Shichibukai... Why is it that whenever you go on a mission, you never bring back a single living suspect to stand trial?!”

Kyle wipes the blood from his Justice Coat and gives a simple, harmless smile.

“Reporting in, Fleet Admiral. They put up too much of a fight. I was merely acting in self-defense.”

“And what about that CP0 agent whose heart you punched through?!”

“Oh, him... That was an accident.”

Akainu: “His sense of justice is too sharp, but there's no denying that everyone he kills deserves it.”

Garp: “At last, someone worthy of inheriting this old man's Iron Fist!”

With the most extreme violence, he upholds the purest justice.