Despite being an underdog many times throughout the series, now more than ever, it is undeniable that Luffy is one of the strongest characters in One Piece. Between his massive strength, surprisingly high battle IQ, and overpowered Devil Fruit, Luffy is a force to be reckoned with on the Grand Line. However, due to the nature of his Devil Fruit, possessing the powers of the Sun God Nika, many One Piece fans believe that Luffy is only able to keep up with strong characters in the series because of his Devil Fruit.