When people die, it's hard to move on from the grief and One Piece perfectly depicts this with Ace's death as Oda chose to ...

Eventually Ace warmed up to Luffy, and along with Sabo, they became brothers. After Sabo's "death," Ace and Luffy grew closer, and he took his older brother role seriously. As he was also adopted ...

Sabo witnesses Imu attempt to kill Cobra, with the World Government pinning the blame on him.