Baki

"Baki" A name given to him by pirates and marines with his real name being unknown is the swordman of the crisome flame pirates and one of the two founding members

Baki grew up learing swordmanship from a drifter who decided to stay in his town after meeting him one day after the drifter died defending the town from a powerful gang Baki fell in tears at his grave promising him he wont return to it until he becomes the world's greatest pirate