With a cast as massive as One Piece's, it's essential that the series pays attention to and develops all of its major characters so they don't become lost in epic the ongoing story. The series does this successfully with the vast majority of its heroes and villains, and especially with its main cast.

Every arc of One Piece highlights different members of the lovable Straw Hat Pirates. Each of the ten crew members has shined their brightest at different points in the story, and their respective best arcs exemplify why they're so loved, be it for their backstory, their development, or their fights.

Monkey D. Luffy Fights Without His Crew in the Marineford Arc Luffy Puts Everything on the Line for Ace

In the final several arcs of One Piece's pre-timeskip era, Luffy is separated from his crew, and the story solely follows him on his quest to...