Emet, the Iron Giant, is one of the most important characters in the Egghead Island arc of One Piece, and certainly a character that fans knew would have great importance attached to it right from the moment it was introduced. Of course, fans did not know when exactly Emet would get an important role, but those with a keen eye knew that he would go on to get a bigger role at some point down the line in the Egghead Island arc itself.