Luffy's pirate spirit in "One Piece" has always been with us, freedom, passion, adventure, and unity. Although they are pirates that everyone fears, they are willing to sacrifice everything for their companions.
It all started with a charming man, Shanks. Shanks is a crew member on the ship of Pirate King Gol D. Roger. He inherits the spirit of Pirate King Roger and gives Luffy a straw hat entrusting the spirit of pirates to pass on the spirit of pirates.
The source of the pirate spirit. Where did the pirate spirit of One Piece Roger come from...