The term "doppelgänger" in mythology refers to a supernatural counterpart or a double of a character, often embodying duality or conflict within one's identity. This concept can represent the struggle between good and evil or the exploration of hidden aspects of the self. In various myths, encountering one's doppelgänger can lead to profound self-discovery, emphasizing the theme of self-reflection. Such figures challenge protagonists and serve to highlight the complexities of human nature, often leading to transformation or enlightenment.