The very concept of Sun God Nika is one of the most important pieces of the entire One Piece story. Ever since the start of the series, Oda has sprinkled many different hints that allude to this mythological being, but it was only in Wano that it was confirmed that the user of this legendary Devil Fruit was the protagonist of the story, Monkey D. Luffy. With his incredible Gear 5 transformation, Luffy finally manifested the Sun God within himself.