“Doppelgänger” is a German word that literally means “double-goer” or “double-walker”. In society, a doppelgänger is usually a person that resembles another person in an uncanny way, because they may have never met or be related to each other. In literature, it is known as a character that has a double or a twin. It can also be defined as “an apparition of oneself or someone whom we are acquainted with and even someone whom we have never met before” (White, 2013). Sometimes doppelgängers can be two alter egos, or two characters that are complete opposites regarding good and evil. They appear often in fairy tales, myths, and gothic literature, such as Mary Shelley’s Frankenstein and Robert Louis Stevenson’s The Strange Case of Dr. Jekyll and Mr. Hyde. Superheroes are known to be dual characters, which are considered to be doppelgängers as well. (White, 2013)
A good example of how doppelgängers are used in literature is the alternate characters in Dr. Jekyll and Mr. Hyde:
“I saw that, of the two natures that contended in the field of my consciousness, even if I could rightly be said to be either, it was only because I was radically both” (Stevenson, 1886). Good and evil live in parallel parts in the protagonist here. Dr. Jekyll is talking now about his struggle between his two personalities. His consciousness is split into two—the honest, polite side that succeeds; and the immoral side that indulges on animal instincts. Dr. Jekyll and Mr. Hyde are essentially the same person, but are two alter egos that are classified as doppelgängers.
Citations:
Buzwell, Greg. “’Man Is Not Truly One, but Truly Two’: Duality in Robert Louis Stevenson’s Strange Case of Dr. Jekyll and Mr. Hyde.” The British Library, The British Library, 13 February 2014, https://www.bl.uk/romantics-and-victorians/articles/duality-in-robert-louis-stevensons-strange-case-of-dr-jekyll-and-mr-hyde
Stevenson, Robert L. “The Strange Case of Dr Jekyll and Mr Hyde, by Robert Louis Stevenson.” The Strange Case of Dr Jekyll and Mr Hyde, by Robert Louis Stevenson : chapter10, ebooks.adelaide.edu.au/s/stevenson/robert_louis/s848dj/chapter10.html.
White, Craig. “Doppelgänger.” Terms & Themes, 9 November 2013, http://coursesite.uhcl.edu/HSH/Whitec/terms/D/dpplgngr.htm