Due to the evil mentality of considering harm to others as a pastime, Joker is always thought to be indignant to Batman’s heroic justice. There is no denying that they cannot have love, but this relationship does not mean that it is all hatred. In movies and comics, it is often the most powerful that they are like “two sides of a coin”, one cannot survive if the other person disappears. Batman is a serious and organized person, while Joker is a devotee of chaos and does not value anything. It is this contradictory point that forms an insidious balance to maintain both.