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Related In The Adaptation
In a work, there are two characters who aren't related in any way. The creator may not have intended for them to be relatives (at least, not at the time, anyway). But when that work is adapted to another form of media, suddenly the people in charge decided to make them relatives. This can be for a variety of reasons including (but not limited to):

  • A pragmatic change to eliminate some exposition; it's easier to introduce Alice and Bob as brother and sister than to introduce Bob as Alice's childhood friend staying at her house while his parents are dead, missing, or off being the Hero of Another Story.
  • The characters have something that makes them very similar (be it superpowers, appearance, motivations, what have you), and thus linking them together makes sense thematically.
  • By making the characters relatives the stakes are raised and there's a more personal connection between them than if they were just friends.
  • Avoiding the Unfortunate Implications of an adult being One of the Kids by making said adult a parent, uncle/aunt or an elder sibling to at least one of the kids they're running around with.
  • Trying to stomp out homosexual undertones in the original work by making the affection characters share familial instead.
  • Adding a twist to a remake of a story that is subject to It Was His Sled.
  • The result of creating a Composite Character.

When it's specifically love interests being turned into family members in the transition, the casting equivalent would be Cast Incest.

Compare or contrast with Everyone Is Related, where it's done within the original work.


Anime and Manga

Comic Books
  • Ultimate Spider-Man
    • In the main Spider-Man comics the name Spider-Woman has been used by a number of ladies, all of whom have almost nothing do with Spider-Man other than similar powers. In Ultimate Spider-Man Spider-Woman is Peter Parker's Opposite-Sex Clone.
    • Inverted with Ben Riley who is Peter's clone in the main comics (sometimes referred to as his "brother" or identical cousin), but is an unrelated lab assistant in the Ultimate verse.
    • In the Ultimate verse Liz Allan is made a Composite Character and thus is not only the alter ego of Firestar, but The Blob is now her uncle (or father).
  • Spider-Man: Chapter One makes Norman Osborn and Sandman cousins to explain their similar looking hair. Became this trope once the book was (very quickly) declared out of continuity and simply an alternate reality take on the Spidey mythos.
  • In the first Post-Crisis revamp of Captain Marvel, Shazam! The New Beginning, his arch-nemesis Dr. Sivanna is his step-uncle and Uncle Dudley is his real uncle named Dudley Batson.
  • In the New 52 version of The Forever People, Serafina (the Gender Flipped version of Serifan from previous continuity) is Vykin the Black's sister. This also entails giving the blond Serifan a Race Lift.

Fan Works
  • The Harmony's Warriors series does this several times:
    • Rainbow Dash and Trixie are adopted sisters, Rumble and Thunderlane are their brothers, and they're all Celestia's children.
    • Scootaloo is Daring Do's niece.
    • Featherweight is Filthy Rich's son.
    • Apparently Celestia is on Shining Armor and Twilight's family tree. Though this has only been explored briefly, Word of God is that it's an important plot point.
  • Empath: The Luckiest Smurf has Hefty and Handy related to each other as twin brothers, rather than as just friends in most other adaptations of The Smurfs.
  • Disney High School begins by explaining that in this world, Frollo and Gothel are married, meaning Quasi and Rapunzel grew up as siblings.

  • In Mortal Kombat: Annihilation, Raiden and Shao Kahn are revealed to be brothers. And later it's revealed that Shinnok is their father. Which isn't canon in the video games, except for the equally non-canon Mortal Kombat vs. DC Universe.
  • May have been intended in the Transformers film franchise, when Optimus Prime calls his arch-nemesis Megatron "brother", even thought they're robots. Also making this example a sort of Cain and Abel.
  • In Batman & Robin, Batgirl is made Alfred's niece (instead of being Commissioner Gordon's daughter).
  • Kirsty in Hellraiser was originally a neighborhood love interest for Larry/Rory Cotton in the novella The Hellbound Heart. In the movie she becomes his daughter.
  • The Doctor Who film Dr. Who and the Daleks had Susan and Barbara as Dr. Who's granddaughters (with the surname "Who" no less), with Ian being Barbara's boyfriend.
  • A variation of this trope. In the TV series of The Addams Family, Fester is Morticia's uncle. In the films, he's Gomez's brother, thus making him uncle to Pugsley and Wednesday. This is due to Gomez and Fester's dynamic chemistry in the TV series. This change remained in future adaptations.
  • X-Men:
    • Inverted in X-Men: The Last Stand there is no relationship between Xavier and Juggernaut while they are step brothers in the comics (with Juggernaut's hatred of Xavier being his major motivation).
    • X-Men Origins: Wolverine makes Sabertooth Wolverine's half-brother (as opposed to simply being another Weapon X experiment). Though it seemed to be Fanon before the movie was filmed, due to Dog (Wolverine's half-brother in the comic) having a resemblance to Sabertooth in the end. This also makes him a Composite Character.
    • In X-Men: First Class, Professor Xavier and Mystique are step siblings, meanwhile there's an inversion with Havok who in the comics is Cyclops' younger brother but in the film there is no mention of any relationship.
  • Inverted in the V.I. Warshawski film, where Bernard "Boom-Boom" Grafaulk, who was V.I.'s cousin in the original books, was changed to a potential love interest. Considering he was the murder victim in both, it didn't get far enough to start getting weird.
  • On the original The Snow Queen, Gerda and Kai are very close friends who grew up together. In the 2012 adaptation, they're biological siblings who were separated until right before Kai gets kidnapped.
  • Frozen is also loosely Inspired By The Snow Queen. In the original, Gerda and the Snow Queen are totally unrelated (indeed, the Queen is closer to The Fair Folk); here the Queen, Elsa, and Gerda's equivalent, Anna, are sisters, and their relationship is the main theme of the movie.
  • Most scholars believe that Achilles and Patroclus were lovers in the original version of The Iliad, but they were made cousins in the 2004 movie Troy, and the insistence on this being the reason for their closeness, (and Achilles' Roaring Rampage of Revenge when Patroclus is killed) bordered on Have I Mentioned I Am Heterosexual Today? Cleolinda Jones mocked this change mercilessly in her parody of the film.

Live-Action TV
  • The remake of Hawaii Five-O made Chin Ho and Kono cousins.
  • In Arrow, Shado is the daughter of Yao Fei. The comic book counterparts have never even met. Also Thea Dearden Queen is basically Mia Dearden reinvented as Ollie's sister.
  • In the Sky1 adaptation of Going Postal, "Princess", the very young clacks tower operator, becomes the granddaughter of Grand Trunk engineer Mr Pony.
  • The David Suchet adaptation of the Hercule Poirot novel Cards on the Table by Agatha Christie adds a mother-daughter relationship between two of the suspects, partly in order to make the older woman's protection of the younger woman more plausible.
  • Freddy Martinez and Cara, best friends in the Goosebumps book Vampire Breath, are said to look like siblings. When it was adapted into a TV episode, they are actually siblings. They learned that they're vampires and Count Nightwing is their grandpa. While in the book, only Fred is a vampire, while Cara becomes a werewolf...

  • In the stage musical of Disney's The Little Mermaid, Triton and Ursula are siblings. (This was part of Disney's original concept for the movie, but it was dropped in development.)

Western Animation
  • Cheshire in Young Justice becomes the sister of Artemis, and therefore the daughter of the original Huntress and Sportsmaster. This entails Artemis and Huntress getting a Race Lift.
    • Martian Manhunter and Miss Martian are uncle and niece, while they're unrelated in the comics.
  • In Martin Mystery the main character and his female partner in paranormal investigating are step siblings. In the comics the show is based off of she's his unrelated Love Interest.
  • The Spectacular Spider-Man
    • In the Spider-Man comics Silver Sable and Silvermane are a completely unrelated mercenary and gangster. In The Spectacular Spider-Man Silver Sable is Silvermane's villainous daughter. Thus her real name was changed from Silver Sablivona to Sable Manfredi.
    • The series also combines this trope with Composite Character. In the comics Uncle Ben's killer is a nameless street thug. In the cartoon he's Black Cat's father The Cat.
    • In the comics, Liz Allan has a step-brother named Mark Raxon with whom she's very close; in this series they're blood siblings with the surname Allan.
  • Spider-Man (1967) had Mary Jane Watson as the niece of Captain Stacy, to whom she was unrelated in the comics. This let her carry some of the role of Gwen Stacy, Spidey's other major love interest in the comics, who wasn't used in the series.
  • In Sabrina: Secrets of a Teenage Witch, Shinji is Enchantra's son.
  • Teenage Mutant Ninja Turtles. Karai in the original Mirage comics was simply Shredder's top agent. In the 2003 cartoon she is his adopted daughter. In the 2012 cartoon she appears to be Shredder's biological daughter, but it's later revealed he kidnapped her in infancy and raised her, but she's actually Splinter's biological daughter (making her the turtles 'step'-sister.)
  • The 2002 He-Man series made Man-At-Arms and Fisto brothers. Also there was some implication (though never confirmed) that either Man-At-Arms or Fisto was Teela's biological father. In the original cartoon Teela was Man-At-Arms' adopted daughter and her biological father was an unnamed soldier who had died years before.
  • In My Little Pony: Friendship Is Magic, Tirek and Scorpan are brothers, while in the original TV special Scorpan was his Dragon. In both cases, Scorpan pulled a Heel-Face Turn and helped the ponies defeat Tirek.
  • In X-Men: Evolution, Xavier and Juggernaut are changed from step-brothers to half-brothers.
  • Winx Club:
    • The Trix go through this in some continuities. They are just friends in the original Italian version, but are often changed to be sisters in foreign dubs.
    • The Mermaid Queen and her daughter who Aisha helps to gain her Enchantix become Aisha's aunt and cousin in the Nickelodeon dub. How a fairy is related to mermaids is never divulged.

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