History Main / ClashingCousins

* Superman and Supergirl in ''WebAnimation/DCSuperHeroGirls'' are cousins with a rivalry.

* ''Manga/ShokugekiNoSoma'': The Nakiri cousins Erina and Alice were very close to each other until Alice departed to North Europe to learn more about cooking. Due to Erina's father Azami educating his daughter into an iron-hearted SupremeChef who should look down on any dish that is considered terrible by ''their'' standards and him throwing every letter away that Alice sent to Erina, the cousins have barely contact each other until they are reunited in Tootsuki. Due to these circumstances, they developed a rivalry, with Alice trying to overthrown Erina's position as the best student of their year, while Erina is "trying"[[note]]she's not doing that much to accomplish this[[/note]] to defend her position. [[spoiler:After Azami's return to Tootsuki, Alice is trying to get his Erina from his hands and to protect her, reconciling their cousin relationship.]]

* This is implied in ''Disney/TheLionKingIISimbasPride''. Nuka and Vitani are two lions raised in the Outlands after being banished from the Pridelands as young cubs. Their parentage is never confirmed, but it's implied that they're Scar's children (thus making them Kiara's first cousins once removed). Kovu is explicitly adopted by Scar (and possibly by Zira as well). The Outlanders are enemies of the Pridelanders [[spoiler:until undergoing a group-wide HeelFaceTurn near the end]].

* Chapter 98 of ''Manga/KaguyaSamaLoveIsWar'' reveals that this is the case with Kaguya and [[spoiler:Maki]], with the latter being the only character in the series who is outright rude to Kaguya. Flashbacks show that this was actually invoked by the latter's father, as the two sides of the family have been hostile to one another for decades, [[spoiler:though that same chapter has the two of them put aside their differences and [[ItMakesSenseInContext and bond over a porn DVD]].]]

* Chapter 98 of ''Manga/KaguyaSamaLoveIsWar'' reveals that this is the case with Kaguya and [[spoiler:Maki]], with the latter being the only character in the series who is outright rude to Kaguya. Part of this is due to the whole main/branch family dynamic, but it's mostly because they're TooMuchAlike.

* This is implied in ''Disney/TheLionKingIISimbasPride''. Nuka and Vitani are two lions raised in the Outlands after being banished from the Pridelands as young cubs. Their parentage is never confirmed, but it's implied that they're Scar's children (thus making them Kiara's first cousins once removed). Kovu is explicitly adopted by Scar (and likely Zira as well). The Outlanders are enemies of the Pridelanders [[spoiler:until undergoing a group-wide HeelFaceTurn near the end]].

* This is implied in ''Disney/TheLionKingIISimbasPride''. Nuka and Vitani are two lions raised in the Outlands after being banished from the Pridelands as young cubs. Their parentage is never confirmed, but it's implied they're Scar's children (thus making them Kiara's first cousins once removed). Kovu is explictly adopted by Scar (and likely Zira as well). The Outlanders are enemies of the Pridelanders [[spoiler:until undergoing a group wide HeelFaceTurn near the end]].

* Inverted in the ''[[Literature/{{Fudge}} Fudge-a-Mania]]'', when Peter and his rival Sheila become cousins due to [[DecemberDecemberRomance their grandparents getting married]].

** Harry was reluctantly taken in by his aunt Petunia's family as a baby after his parents died. They spoiled their son Dudley, who used Harry as his favorite punching bag (oddly enough, Dudley never manifests any jealousy towards his cousin's magical ability they way Petunia envied her sister Lily). After Harry saves Dudley from a Dementor attack, he Dudley starts becoming a slightly less repugnant human being, actually showing concern for Harry's safety before they part, and later sending Harry some of his childhood items after Petunia dies.

** PlayedWith for Nymphadora Tonks and Draco Malfoy, who are first cousins[[note]]Draco's aforementioned mother, Narcissa Malfoy, was the sister of Tonks' mother Andromeda[[/note]] and fight on different sides of the Wizarding War (The Order for Tonks, the Death Eaters ([[spoiler:at least, initially]]) for Draco). However, the two never truly interact on-screen, let alone fight each other. In fact, Tonks makes an offhand remark about Draco, calling him "the Malfoy family".

* On ''Series/{{Justified}}'' Boyd and Johnny Crowder are cousins in a family of criminals. They are initially on very good terms but then Boyd's HeelFaithTurn results in Johnny being crippled and Johnny grows to hate Boyd. They seem to reconcile for a while but Johnny was simply waiting for a good opportunity to backstab Boyd. The cousins become biter rivals and much blood is spilled before [[spoiler: Johnny is killed.]]

* ''VideoGame/CrusaderKings 2'': As patrilinear cousins are close enough related to inherit a claim on each others titles, this is a common sight. Furthermore, if they are in each others line of succession they will gain a casus belli to take their cousins titles, meaning that they will often try to dethrone one another.

* Celene and Gaspard in ''VideoGame/DragonAgeInquisition'' ended up this way after Celene essentially stole the Orlesian throne from him via political maneuvering. Eventually Gaspard gets fed up with his cousin's very different way of handling things and it erupts into civil war. [[LampshadeHanging Lampshaded]] by an [[HeroicBastard illegitimate nobleman]] who remarks that when he quarrels with his cousin, some wine gets spilled and maybe someone loses a tooth. When the empress quarrels with her cousin, the country gets torn apart and thousands of people die.

* [[spoiler:Lily]] and [[spoiler:Shizune]] from ''VisualNovel/KatawaShoujo'' are revealed in both of their arcs to be cousins. They get along poorly due to their contrasting personalities. It doesn't help that they can't communicate well due to [[spoiler:Shizune being deaf and Lilly being blind]].

** Tarvek is also the victim of constant abuse from his cousin Violetta who spent years thinking he'd gotten her [[ReassignedToAntarctica reassigned to Mechanicsburg]] in an attempt to upend her carer. Even after learning that he did it to save her life, she still finds him incredibly annoying. Violetta also detests Martellus for what he's done to Agatha and spends time undermining his plans.

* The Delightful Children from Down The Lane in ''WesternAnimation/CodenameKidsNextDoor'' are villains and Numbuh 1's adopted cousins, though the latter point is never actually discussed in-series.

* In ''WesternAnimation/{{Rugrats}}'', one-year-old Tommy Pickles has an antagonistic relationship with his three-year-old cousin, Angelica, who regularly calls him and his friends "Dumb babies" and bosses them around.

* Early on in ''WesternAnimation/ElenaOfAvalor'', Chancellor Esteban seems like an antagonist in the making towards his cousin, Princess Elena, and everyone just puts up with his {{jerkass}}ery because he's family and is a vital figure in keeping the kingdom running. It eventually turns out that this only goes as far as JerkWithAHeartOfGold, he deeply cares about his family, and if anything, his relationship with Elena is more LikeBrotherAndSister. Thanks to CharacterDevelopment, he goes from deliberately trying to undermine Elena who he sees as irresponsible to trusting her judgement.

* When introduced Neji from ''Manga/{{Naruto}}'' has a beef with his cousin Hinata for being the daughter (and thus, heir) of the main Hyuuga branch (while Neji is in the branch family but is generally stronger than Hinata). He softens after Naruto beats him in the Tournament Arc, though. They eventually become close friends [[spoiler:and Neji undergoes a HeroicSacrifice for Hinata]].

* In ''WesternAnimation/TheCrumpets'', Caprice enjoys bullying her adopted cousin Cordless. She fooled him into dropping his video game portable, injected him with a huge syringe by surprise, and ''pushed him out a window to have him fall'' to his adoptive mother's car. In one phone call between the cousins, Caprice hears that he will get revenge.

* ''Series/ThatsSoRaven'': In a first season episode called "Dissin' Cousins," the show's TitleCharacter is revealed to have a rich and beautiful (but also mean and snobby) cousin named Andrea who lives in Europe and gets to travel to all kinds of exotic places all over the world--Raven's friend, Eddie, also has this huge crush on Andrea. In the end, Raven and Andrea manage to patch things up when their relationship turns out to be a case of MutualEnvy--Andrea explains to Raven that even though she has the chance to live in Europe and travel to all kinds of exotic places, she hates having to move around so much and how Raven ultimately got to a have a much more "normal" life (it's unknown if Andrea knows about Raven's psychic abilities).

** In ''Order of the Phoenix'', it is established that this was the dynamic that Sirius Black had with his cousins Bellatrix Lestrange and Narcissa Malfoy. [[Spoiler:In fact, the former kills him in the climax of that book]].

Compare to SiblingRivalry and in extreme cases CainAndAbel. Can often overlap with (or lead to) PrincelingRivalry and FeudingFamilies.

Compare to SiblingRivalry and in extreme cases CainAndAbel. Can often overlap with (or lead to) FeudingFamilies.

* ''Literature/HarryPotter'': Harry was reluctantly taken in by his aunt Petunia's family as a baby after his parents died. They spoiled their son Dudley, who used Harry as his favorite punching bag (oddly enough, Dudley never manifests any jealousy towards his cousin's magical ability they way Petunia envied her sister Lily). After Harry saves Dudley from a Dementor attack, he Dudley starts becoming a slightly less repugnant human being, actually showing concern for Harry's safety before they part, and later sending Harry some of his childhood items after Petunia dies.

* The main antagonist of ''Film/BlackPanther'' is T'Challa's previously unknown cousin [[spoiler:Erik]].

* The premise of the CBBC comedy ''Kevin's Cousins'': Kevin is horrified that his cousins will be staying with him for the summer -- [[GirlsHaveCooties because they're girls]].
* In an early episode of ''Series/ThatsSoRaven'', it's revealed that the TitleCharacter has a snobby cousin named Andrea who lives in/goes to school in Europe and who her friend, Eddie, has huge crush on. In the end, Raven and Andrea manage to patch things up when their relationship turns out to be a case of MutualEnvy: Andrea explains that even though she gets to travel to all kinds of exotic places, she hates having to move around so much and feels that Raven's lucky on how she ultimately got to have a much more "normal" life.

[[folder: Anime and Manga]]

[[folder: Film - Animation]]
* Arrow and Rudolph from ''WesternAnimation/RudolphTheRedNosedReindeer1998'' are enemies and cousins (as shown by throwaway lines showing that their fathers are brothers). Arrow is TheBully who teases Rudolph for his unusual nose. They're also pining after the same doe-- Zoey.

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* In ''Webcomic/GirlGenius'' the underhanded Tarvek Sturmvoraus and his brutish cousin Martellus von Blitzengaard are both potential heirs to the Lightning Throne and Martellus makes numerous assassination attempts on his cousin and instigated several battles between their allies. Tarvek is also the victim of constant abuse from his cousin Violetta who spent years thinking he'd gotten her [[ReassignedToAntarctica reassigned to Mechanicsburg]] in an attempt to upend her carer and even after learning that he did it to save his life still finds him incredibly annoying. Violetta detests Martellus for what he's done to Agatha and spends time undermining his plans.

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* Annabellle from ''WesternAnimation/AllDogsGoToHeaven'' is an angel who has an evil cousin named Belladonna. Belladonna is implied to be a FallenAngel.

* ''WesternAnimation/LiloAndStitchTheSeries'' has Stitch going around fighting and befriending his "cousins" (though, being created by the same person makes them closer to siblings). In particular, Experiment 625 remained Stitch's enemy until he underwent a HeelFaceTurn in the finale.