One Piece: The Paramount War, I Kicked the Flash Away

[Overpowered protagonist + making up for regrets + decisive and ruthless + pure wish fulfillment]

Chen Feng transmigrates into the world of One Piece and is found by Ace. The two share many unforgettable moments. While training alone, Chen Feng gains the ability to copy and devour other Devil Fruits. When he hears that Ace is about to be executed, he arrives at the scene just before the execution.

Kizaru: “Have you ever been kicked at the speed of light?”

Chen Feng laughs. “I’ll take your Devil Fruit power, and while I’m at it, I’ll kick you right back!”

Sengoku: “What kind of joke is this? How can this man have the power of the Tremor-Tremor Fruit!?”

Ace: “It’s been years. You’ve become quite something, haven’t you?”

Whitebeard: “Kid, there’s no ship for me in the New World. Inherit my will and lead the Whitebeard Pirates onward!”

Marco: “Chen Feng, you’ve inherited Pops’ will. You can’t stop here. You’re our new captain!”