The smash hit anime series One Piece is a lively, exciting shonen adventure that inspires fans with hopeful moments of friendship, courage, and the heroes defeating the forces of evil. In particular, protagonist Monkey D. Luffy is a bright and cheerful fellow who always fights for what's right with a smile on his face, but even Luffy's smile might sometimes get lost in darkness. At times in One Piece's story, Luffy faces moments of despair, anger, or fear.
Source:https://www.cbr.com/one-piece-darkest-luffy-moments/