In One Piece episode 415, "Hancock’s Confession: The Sisters' Abhorrent Past," Boa Hancock reveals her dark past as a former slave to the Celestial Dragons to Luffy, marking a turning point in their alliance and the Amazon Lily arc. After witnessing Luffy's selfless nature and his animosity toward World Nobles, Hancock agrees to help him, with the episode available on platforms like Crunchyroll and Apple TV .