One Piece
Gol D. Roger was known as the "Pirate King," the strongest and most infamous being to have sailed the Grand Line. The capture and death of Roger by the World Government brought a change throughout the world. His last words before his death revealed the existence of the greatest treasure in the world, One Piece. It was this revelation that brought about the Grand Age of Pirates, men who dreamed of finding One Piece—which promises an unlimited amount of riches and fame—and quite possibly the pinnacle of glory and the title of the Pirate King. Source:https://myanimelist.net/anime/21/One_Piece
Monkey D.Luffy
Luffy is the captain of the Straw Hat Pirates and is best friends with all of them and values them over all else. At first glance, Luffy does not appear to be very intelligent, often seeing things in childish manner and can easily be amazed by the simplest things. However, because he views the world in a straightforward and simple manner, he is occasionally the only person who can see past the events and see what should be done.
Sanji
Sanji is the chain-smoking chef of the Straw Hat Pirate Crew. He has superb fighting skills that only make use of his legs, in an effort to minimize damage to his hands which would impair his cooking skills. Show spoiler Sanji uses an array of powerful and varied kicking moves when he fights. His cooking skills are world class, and he was mentored in both cooking and fighting by Chef "Red Leg" Zeff of the Baratie. He was born in the North Blue, but grew up in the East Blue.
Roronoa Zoro
Zoro was the first crew member to be recruited by Luffy. Zoro is a skilled swordsman who fights with his own unique sword style known as santoryu (three katana fighting style).This is achieved by using one katana in each hand and another in his mouth. He is also seen fighting with only one or two swords. When in a serious fight he ties his bandana, normally tied on the arm, on his head. Though not a samurai, he appears to maintain a certain degree of bushido, and is frequently mistaken for one. Unlike Luffy and most of the other Straw Hat pirates, Zoro has been known to kill his opponents if he has to, though never in cold blood.