History Main / SinglemindedTwins

* [[CreepyTwins Hansel and Gretel]] from ''Manga/BlackLagoon''. Sure they are presented as slightly different personalities, with different genders, until they switch the gender and accompanying personality between them.
--> "I'll be Gretel for a while, now."

-->'''Cersei:''' I need you. I need my other half. You are me, I am you. I need you with me. In me. Please, Jaime. Please.

* ''Series/SeventhHeaven'' with Sam and David. One wonders if the show runner has ever met real life twins.

** While never explicitly stated to be twins, the Bin Brothers function as a single character and never show their faces. After their death, their [[TailSlap kagune]] are combined together to repair [[DropTheHammer Dojima]].

* ''Literature/ASongOfIceAndFire'': Played with in regards to Cersei and Jaime Lannister. They're introduced as HalfIdenticalTwins, and then revealed to be {{Twincest}} lovers. Both tropes imply this trope as well. At the end of the first book Cersei drives it home by saying, "We are one person in two bodies." But in later books both twins get POV chapters which reveal that... no, actually, they're really ''not'' that alike, making it a SubvertedTrope. But it's played with even further in that the twins ''really believe'' this trope is in effect. Cersei and Jaime Lannister have an elaborate personal mythology around their twinhood, and "one person in two bodies" is the core tenant of that. Jaime is convinced that "If I were a woman, I would be Cersei," and Cersei likewise thinks, "If I were a man, I'd be Jaime." Their POV chapters, however, reveal that they're wrong about this.

* The Stepford Cuckoos (Celeste, Esme, Mindee, Phoebe, and Sophie) in the ''ComicBook/XMen'' family of books, are identical quintuplets and form a "Five-in-One" telepathic mind. [[spoiler: Later events show the "hive" mind splintering, leading to the deaths of Esme and Sophie.]] Much later in ''ComicBook/UncannyXMen'', Phoebe dyes her hair and starts dressing differently from the others (who are pretty upset about it). And then Mindee dyes ''her'' hair. They still all act alike, though.

* In the anime version of ''Manga/{{Trigun}}'' this trope is referenced by the young Knives: once positively, with regard to one of them being bullied, and once negatively, after he gives himself a haircut: "if we stay the same, we won't have any individuality."
** Of course, they then spend over a century as PolarOppositeTwins.

* In ''[[ComicBook/RobinSeries Robin Year One]]'', [[ComicBook/TwoFace Two-Face]] employs a pair of these, identical suits and finishing each other's sentences included. Given Two-Face's [[TwoFaced gimmick]] it's peculiar that he doesn't have them more often.
* Though never explicitly stated (it's implied to be the result of a string of freak coincidences), Franchise/{{Batman}} villains the Trigger twins. They first met when they both attempted to rob the same bank, only to discover their exact resemblance to one another. Ever since, neither of them has ever seemed to come up with an idea the other hadn't been thinking of as well.

* ''Literature/AnythingYouCanDo'' has a rather... scary yet different subversion. When Mart is two, his father brings him to work, '[[TemptingFate just stopping by]]'. A bad accident kills the father, leaving most of Mart's nervous system[[note]]everything but most brain and some spinal function[[/note]] severely damaged. The doctor recommends multilevel therapy, but the mother doesn't follow through. [[spoiler:Mart shares a psychic link with his twin Bart. Mart's condition means ''their minds can't balance out;'' Mart does not have the wealth of experience needed. Over the years, Bart's mind essentially ''copies over'' to Mart's.]]

* ''Series/TheGifted'': {{Posthumous Character}}s Andreas and Andrea von Strucker shared WonderTwinPowers and -- it's suggested -- TwinTelepathy.

* Mark Frost's ''Literature/TheListOf '' has Larry and Barry, identical twins and professional thieves. No one knew that they were indeed twins, so they posed as the same person. One of the brothers would appear in a pub or restaurant making a big show (one of the brothers liked to sing while the other liked to recite ribald limericks) while the other brother went to work cleaning out someone's flat. If one of the brothers was suspected, he could produce any number of witnesses to give him an alibi. When one of the brothers received a scar from a bullet wound, both brothers grew beards to cover the scar and maintain the fiction that they were the same person. Ultimately they were found out by Agent to the Crown Jack Sparks who pressed them into his service in exchange for a pardon for their crimes.

* Creator/IanMcDonald's ''Desolation Road'' (set in the far future) had an incident with two clone-assassins, [=AlphaJohn=] and [=BetaJohn=]. They were two clones who were one being, with perfect telepathic connection, having the advantages of sharing all their senses. The victim realizes that [[spoiler:he can shoot one of them, and they'll both die]]. So he does that.

** In ''Regina's Song'' the title character and her sister Regata are this, until the latter is raped and murdered, where they effectively become single-minded twins in a single body. Kind of. It's complicated.
* Used in some form in ''A Breath Of Snow And Ashes'' in the Outlander series, with Jo and Kezzie. [[spoiler:Namely, in that they end up [[TwinThreesomeFantasy mutually devoted--and married to--the same woman]], and there's a bit of a kerfluffle over whether it's "really" bigamy or not, if twins can be taken as the same soul shared between two bodies.]] Yeah. It's a bit weird.

* Mark Frost's ''The List Of 7'' has Larry and Barry, identical twins and professional thieves. No one knew that they were indeed twins, so they posed as the same person. One of the brothers would appear in a pub or restaurant making a big show (one of the brothers liked to sing while the other liked to recite ribald limericks) while the other brother went to work cleaning out someone's flat. If one of the brothers was suspected, he could produce any number of witnesses to give him an alibi. When one of the brothers received a scar from a bullet wound, both brothers grew beards to cover the scar and maintain the fiction that they were the same person. Ultimately they were found out by Agent to the Crown Jack Sparks who pressed them into his service in exchange for a pardon for their crimes.

* Flora and Fauna, Peter and Fudge's second cousins in the Judy Blume book ''Double Fudge''. The girls dress alike and sing together. To make things worse, the girls ''finish each other's sentences''.

* The Gowder twins in ''The Stranger House'' don't fulfil the 'never apart' part of this trope, but they are not only indistinguishable but treated as entirely interchangeable by the other characters. They are known as Laal and Girt:[[note]]meaning little and big[[/note]] whichever twin you are talking to is Laal, and you never meet Girt (presumably when they're both present Laal is whichever you are addressing at that moment). No-one knows what the twins think about this. They're... odd.
* [[http://www.gutenberg.org/catalog/world/readfile?fk_files=1536195&pageno=2 Anything You Can Do...]] has a rather... scary yet different subversion. When Mart is two, his father brings him to work, '[[TemptingFate just stopping by]]'. A bad accident kills the father, leaving most of Mart's nervous system[[note]]everything but most brain and some spinal function[[/note]] severely damaged. The doctor recommends multilevel therapy, but the mother doesn't follow through. [[spoiler:Mart shares a psychic link with his twin Bart. Mart's condition means ''their minds can't balance out;'' Mart does not have the wealth of experience needed. Over the years, Bart's mind essentially ''copies over'' to Mart's.]]

->'''Gemma''': Are you thinking what I'm thinking?\\
'''Gem''': When ''aren't'' I thinking what you're thinking?

* In ''Whispers'', by Creator/DeanKoontz, the heroine was almost raped and killed by a famous man before killing him herself. He couldn't have done it because he was away. As you can guess, it was his twin. The other comes back and talks about how she killed him. Turns out [[spoiler:their mother was impregnated by [[ParentalIncest her father]] and gave birth to twins. After some time, the stress drove her insane and she believed they'd been conceived when a demon raped her. To conceal them, she forced them to be one person, and locked them in a cellar with hundreds of horrifying, huge cockroaches that would crawl all over them when they didn't act or think as one. As a bonus, she made them believe they had demonic penises, and that they always had to hide them from everyone else. Now that they don't have [[{{Twincest}} each other]], their only "outlet" is with the only other person who knows--Mom. She's dead--but he thinks she's coming back as different women. [[{{Squick}} Shudder.]]]]

* ''Literature/ASongOfIceAndFire'': Played with in regards to Cersei and Jaime Lannister. They're introduced as HalfIdenticalTwins, and then revealed to be {{Twincest}} lovers. Both tropes imply this trope as well. At the end of the first book Cersei drives it home by saying, "We are one person in two bodies." But in later books both twins get POV chapters which reveal that... no, actually, they're really ''not'' that alike, making it a SubvertedTrope. But it's played with even further in that the twins ''really believe'' this trope is in effect. Cersei and Jaime Lannister have an elaborate personal mythology around their twinhood, and "one person in two bodies" is the core tenant of that. Jaime is convinced that "If I were a woman, I would be Cersei," and Cersei likewise thinks, "If I were a man, I'd be Jaime."
Their POV chapters, however, reveal that they're wrong about this.

* In ''WesternAnimation/BatmanBeyondReturnOfTheJoker'', Dee-Dee/The Deeds/Delia & Deidre Dennis are twin sisters who may as well be two halves of one person; they currently provide the page image. Besides looking and talking exactly the same (both twins are rapidly and amusingly voiced by Creator/MelissaJoanHart), they move and fight in incredibly effective teamwork. Just goes to show how devastating it would be if villains didn't [[MookChivalry attack the hero one at a time]]...

** They have been known to address one another as 'Dee Dee'; as in "You think so, Dee Dee?" "Oh yeah, Dee Dee."

* Imari and Sayoka from ''LightNovel/{{Inukami}}'', two of Kaoru's Inukami, speak and act in unison.
%%* Ai and Ren from ''LightNovel/{{Kanokon}}'', the poor ninja duo.