One Piece: Max-Level Observation Haki from the Start, Beating Shanks to Tears

Roger's gaze swept across the vast blue sea and settled on the boy standing before him. He asked in a low voice, "Kid, why are you so determined to get on our ship?"

"Hahahaha! I'm becoming a pirate to turn the world upside down, of course!"

Only after they put out to sea did Roger realize, to his astonishment... that somehow, he'd taken a little monster aboard.

Stronger than the giants?

Born with a natural grasp of Observation Haki?

Through one absurd, chaotic island adventure after another, the kid revealed a terrifying talent for learning. He quickly mastered guns and swordsmanship, and eventually became the nightmare that would haunt Shanks and Buggy for years to come!