When you look into a mirror, you see a person who is in some ways identical to yourself, but who is also in some ways your opposite. If you are right-handed, your mirror will show a left-handed person, and vice versa. This "same but opposite" is the cornerstone of a Mirror Universe. A character's "same but opposite" counterpart is the Mirror Self. However, a Mirror Self can sometimes also be created by misuse of Applied Phlebotinum. Not to be confused with an Alternate Self, who is the same person without being an opposite. Might have gone through different experiences and been changed by them, but is not a polar opposite like the Mirror Self. Compare Me's a Crowd.
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Anime And Manga
- Subverted in Cardcaptor Sakura by the use of The Mirror card which creates an exact copy of Sakura that she can then control. Before her capture The Mirror appeared to be a mischievous opposite version of Sakura but this is likely just the personality of the card itself and not because it's Sakura's reflection.
- In the Smurfs story "The Hundredth Smurf", a Smurf's mirror is struck by lightning, which brings his reflection to life. The reflection speaks backwards and does everything the original Smurf does, but in reverse (lifting the right arm when the other lifts the left, for instance). After he causes chaos in the village by his opposite nature, the reflection decides to return to the mirror, but he goes through it instead, and comes out a regular Smurf.
- John Byrne retold Donna Troy's origin in Wonder Woman so that she was originally the mirror self of Princess Diana as a teenager, but given a separate personality by the sorceress who owned the mirror. Donna Troy was then captured by Queen Hippolyta's nemesis Dark Angel, who mistook her for Diana, and subjected her to live multiple lives that all ended in tragedy, ultimately leading to the one where Donna becomes Wonder Girl/Troia of the Teen Titans. This origin has recently been retconned out of her history since 2006.
- Conan the Barbarian once visited a parallel universe to meet Conar, a bastard coated with bastard with bastard filling as opposed to his jerk with a heart of gold nature. No less of a badass and favored of the fates, Conar had already won his throne by that time, and it turned out the arrival of Conan foiled an assassination attempt by some would-be usurpers. After a fight to a standstill (after winning the hearts or more of some of his mirror self's subjects, including the wife and the mistress), Conan left the mirror world, justifying the act as leaving the throne to its rightful owner.
- Scott Pilgrim vs. The World has "Nega-Scott". Subverted. Other than his Dark Link appearance he's exactly like Scott and they get along swimmingly.
- In The Dark Crystal, the "good" urRu/Mystics and the "evil" Skeksis are split beings, formed from a race (the "urSkeks") not native to the world of the film, and who were formed when the Crystal itself was split. Each Mystic has a Skeksis counterpart, and if one dies, so does the counterpart.
- The Callahans Crosstime Saloon story "Mirror/rorriM Off The Wall" has a Mirror Universe where everything is in reverse/backwards, including handedness and fingerprints. One of its inhabitants is a Mirror Self of someone in our universe: they're both named Robert Trebor.
- In Pact, Blake and Rose Thorburn are reflections of each other born as different genders. Only one can inhabit the real world at a time-the other is trapped in an empty mirror world created by light shining through mirrors in the real world.
- One of the earliest Star Trek novels, "Spock Must Die!" involved a transporter accident duplicating Spock. As such things go, of course the clone is evil, but Kirk and the others can't tell who is who. They eventually figure out that since the copy was created by a reflected transporter beam, it is reversed left-to-right, right down to the molecular level. He can only survive on special synthesized food, because his body is made of backwards amino acids.
Live Action TV
- In the Star Trek universe, there is a Mirror Universe where every character has a Mirror Self. Good characters generally have evil Mirror Selves, and vice versa (there are exceptions, like "Smiley" O'Brien). Ambiguous characters often have their defining traits reversed.
- The Doctor encounters mirror counterparts of the UNIT team in the Doctor Who serial "Inferno".
- In Charmed, the Mirror World has a Mirror Self of every character, just like in Star Trek. The characters also have alignment-shifted powers, creating oxymorons like the Demon of Hope.
- It's not really an oxymoron, because demons are the good guys there.
- It's not impossible for hope to become figuratively demonic.
- Using the right spells in Dungeons & Dragons allows characters to enter the Plane of Mirrors, a transitive plane that uses a set of mirrors as a Portal Network - the catch was that entering it created an opposite-alignment mirror counterpart (opposite primary hand and all) that would try to kill you and take your place in the "real" world. An adventuring party that pursued a foe onto the plane ran the risk of encountering its very own band of Psycho Rangers... as well as one potential ally.
- Close to the end of Quest for Glory III. Each hero was forced to fight a twisted mirror image of him- or herself.
- The final boss of the Old Kingdom instance in World of Warcraft summon mirror versions of the heroes for them to fight.
- In Zelda II The Adventure Of Link, Link has to do battle against a mirror image of himself. He was so popular that "Dark Link" has shown up several times since then.
- In Final Fantasy IV, when Cecil becomes a Paladin he must fight a mirror image of himself to atone for his past.
- In Prince of Persia, the Prince, at one point, has to jump through a mirror, which sets his reflection free, who is pretty much the game's most memorable villain. It makes a few appearances throughout the game generally being a jerk, until he has a level dedicated entirely to dealing with it.
- Played with in The Non-Adventures of Wonderella. Everybody in the mirror universe has the opposite moral alignment of their normal self — except for Wonderella and Dr. Shark. As the mirror-world's Wonderella explains it:
Anti-Wonderella: The opposite of neutral is still neutral!
- In Dark Legacy Comics, it turns out that the characters have mirror selves on the other side. The protagonists are alliance characters in World Of Warcraft, so their mirror selves are horde. This make at least one character frustrated and at least one (*2) character(s) happy.
- Homestuck: The Scratch mechanism in Sburb and Sgrub sessions basically creates these — your ancestor will take your place in life, down to living in your house, and usually shares a decent amount of your personality as well as your Aspect in the game, but they're not a direct copy.
- In The Batman, Batman, Robin, and the Flash dealt with mirror versions of themselves created by the inventions of the Mirror Master.