Ian: What? No! Really?
Jeremy: Mum should have told us. I feel cheated!
Alexa: They think they're charming.
- Kaoru and Hikaru in Ouran High School Host Club bicker regularly.
- Considering twins make up half the cast, it's only natural this trope pops up a lot in Futakoi.
- Shion and Mion from Higurashi no Naku Koro ni, occasionally, but sometimes it isn't for laughs.
- Bakemonogatari's Next Time On sequences are rapid-fire, seemingly random exchanges between Tsukihi and Karin, the main character's younger sisters.
- America and Canada get to do this occasionally in Axis Powers Hetalia, when they're alone together and America happens to remember he has a brother. Though there's usually a clear winner there.
- Ethan and Evan in Dalton
- Alice in Wonderland: Tweedledum and Tweedledee.
- Robert A. Heinlein:
- Castor and Pollux Stone from The Rolling Stones
- Laz and Lor in his later novels.
- Subverted in Time For The Stars. Tom and Pat Bartlett think they have a private language that no one else understands, which they refer to as a "prison-yard whisper". They participate in a study of twin communication, which proves that they can't understand audio recordings of the "whisper". It turns out that they're telepathic. And the telepathy is instantaneous and has no range limit. It works over interstellar distances.
- Fred and George Weasley from Harry Potter.
- Lori's sons Will and Rob Willis (of the Aunt Dimity series) will bicker a fair amount, sometimes with just a simple one-upmanship, sometimes in a larger succession. Their request to visit Skeaping Manor's museum prompts this exchange:
Lori: Yes, we'll go. If—Will: We clear the table.Rob: And load the dishwasher.Will: And play nicely until bedtime.Rob: And go to bed without arguing.Will: And promise to behave ourselves in the car.Lori (laughing): How quickly they learn.
- The Belgariad's Beltira and Belkira. "We're sorry, it's - " "Our nature."
- The Lutece twins in Bioshock Infinite. Played with in that they're not so much twins as they are gender-swapped alternate-reality versions of the same person, so it makes sense they can play off each other very well.