History Main / ClashingCousins

* [[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 Lily being blind]]. Despite this, [[spoiler:they reconcile on Lilly's route, and in Shizune's route, Shizune admits that she was in the wrong in their disputes]].

* The hotheaded cousins, Ginta and Tsutomu of ''Manga/MarmaladeBoy'' have frequently had childish bouts with each other since they were little, with their mutual rivalry towards [[ChickMagnet Yuu]] over the girls that they like, Miki and Arimi respectively, being the one thing they can agree on. Once Ginta moves on from Miki and he and Arimi begin to develop feeling for each other, Tsutomu calls him out for it and it causes their own rivalry to peak, resulting in a brutal fight once Ginta finally reaches his limit with him. The two do reconcile a few minutes after the fight and Tsutomu decides get over Arimi to fully support his cousin's relationship [[spoiler:going as far as to help bring the two back together after the couple have a falling out later in the series]].

* Ned and Tony Stark in ''Fanfic/AManOfIron''. Ned dislikes Tony for his flippant attitude, arrogant and narcissist personality, and utter disregard for his Northern heritage, while Tony dislikes Ned for his HonorBeforeReason attitude, grim personality, and seeming refusal to move from the past. The trope gets eventually downplayed as the two of them get past their differences and learn to understand and appreciate the other better.
* ''Fanfic/TheNightUnfurls'': {{Downplayed}} for Alicia and Prim. They are cousins on good terms, and both of them care for each other's well being, but their opposing views on Kyril (the former mistrusts him while the latter vouches for him) causes tension between them.
* ''Fanfic/SkyholdAcademyYearbook': In ''Bright Jewels, Chained City'', feuding cousins Gaston and Celeste are both vying for the same important political appointment. (They're based on cousins Grand Duke Gaspard and Empress Celene from ''VideoGame/DragonAgeInquisition''.)

* ''Film/Scream4'' devolves into this in the third act, after it's revealed that [[spoiler:Jill Roberts is Ghostface, and has been reenacting the Woodsboro murders, but stages herself as the FinalGirl to gain fame, following in the footsteps of her cousin, Sidney Prescott. [[ItsPersonal Naturally]], Sidney calls her insane]].
* ''Film/StuartSavesHisFamily'': The Smalleys do not get along with Cousin Ray and his family, such as burying one of their own family members in Aunt Paula's cemetary plot.

* In the ''Literature/{{Deryni}}'' works, Conall Haldane is jealous of his cousin Kelson. Kelson is the son of King Brion Haldane, while Conall is the eldest son of Brion's younger brother Nigel. Kelson is sometimes low-key about his authority, while Conall is very (perhaps excessively) proud of his royal rank; Conall haughtily stands on ceremony at the court of the Earl of Transha, and Kelson scolds him for it. Later on, Conall secretly seeks to learn to use the "Haldane powers", though they're traditionally reserved for the ruling monarch (who is, at that point, Kelson), and he pursues Rothana Nur Hallaj after Kelson disappears in ''The Quest for Saint Camber'' in large part because she's not only beautiful, but also because he once witnessed Kelson wooing her. Conall actually persuades her to marry him since Kelson is presumed dead and his father Nigel is then in a coma and not expected to come out of it. Eventually, Kelson and Conall [[spoiler:fight a duel arcane at the end of The Quest]].
* ''Literature/EarthsChildren'': Ayla and Broud are technically adopted cousins, though they never refer to each other as such, and both view the other as their {{Archenemy}}. Broud develops an IrrationalHatred of Ayla for unintentionally overshadowing his transition into adulthood and not fitting in easily; Ayla hates him for being arrogant and entitled, not seeing why she should have to be at his beck and call simply because he's the future leader, which further inflames his resentment. Broud physically  and psychologically bullies Ayla for years, and eventually begins [[RapeAsDrama sexually abusing her]]; it's made clear he isn't doing it out of lust as he finds her ugly, but because he enjoys dominating and hurting her. He gives up when she stops fighting him and doesn't outwardly let it bother her. He eventually [[spoiler:has her cursed with death for arbitrary reasons (which he'd wanted to do for years)]], though she manages to humiliate him and declares that [[spoiler:he can never make her die]].

* Taken to the logical extreme in ''Series/AlmaGemea'': Cristina and Luna aren't just clashing, they're ''mortal enemies''. Initially, the hatred is one-sided from Cristina's part: she is very jealous of Luna for marrying Rafael, the love of her life, and for receiving the family jewels instead of her (who is the oldest cousin), making her feel like TheUnfavourite. Cristina is indirectly responsible for Luna' death, as she is killed by Guto, who Cristina sent to rob the jewels. After Luna [[{{Reincarnation}} reincarnates]] as Serena, not only does Cristina's hatred for her cousin rekindle, but their conflict is no longer one-sided, and it gets progressively worse throughout the story, with Cristina trying to get Serena killed multiple times. She also still bears a huge grudge against Luna, who she blames for Rafael having no desire for her, prompting her to attack [[ShrineToTheFallen Luna's atelier]] several times, madly yelling at the dead woman.

* ''Series/DowntonAbbey'': Mary and Matthew are distant cousins and do ''not'' like each other when they first meet, as Matthew is poised to inherit Mary's family home and fortune (which Mary sees as her right) while Matthew is attracted to Mary but thinks that she's a snob. They eventually warm to each other considerably, but circumstances prevent them from acting on their feelings. As well, Matthew's mother Isobel doesn't get along with Mary's mother Cora or grandmother Violet at first, though they also mellow out as the series progresses. In the first two seasons, the main Crawley branch calls Matthew and Isobel "Cousin Matthew/Isobel" and vice versa, but the two Crawley branches drop this as they become closer.

* 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.]]

* ''Series/LoveAlarm'': Jo-jo has a terrible relationship with her cousin Gul-mi, who blames Jo-jo for all of her family's problems, since Jo-jo has been raised by Gul-mi's mother ever since she became an orphan. It only gets worse when Jo-jo begins a relationship with Sun-oh, who Gul-mi has a crush on.

* ''Series/{{Supernatural}}'': Sam and Dean Winchester are the perfect, pre-destined blend of one elite hunting family line and one family line of world class scholars of the supernatural. However, in the Supernatural world, hunters and Men of Letters don't get along and despite their last name, their hunter genes actually come from their mother's side, the Campbells. When the Campbell clan resurfaces in season 6 (mostly, second and third cousins of Sam and Dean), they have a deep disdain for both brothers. This ultimately leads to bloodshed, although this may be primarily because [[spoiler:the season 6 Campbells are almost all demon-possessed]]. However, it is shown in season 4 flashback episodes that Samuel Campbell never approved of Mary and John's marriage (Sam and Dean's parents) because John wasn't from a hunting family. Also when, [[spoiler:Henry]] Winchester appears in a season 8 episode, he's appalled to find out that his grandsons are hunters instead of scholarly Men of Letters.
* ''Series/ThatsSoRaven'': In a first season episode called "Dissin' Cousins," Raven 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 has always been secretly envious of Raven's much more "normal" life (it's unknown if Andrea knows about Raven's PsychicPowers).

* ''VideoGame/CrusaderKings 2'': As patrilinear cousins are closely 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 cousin's titles, meaning that they will often try to dethrone one another.

* In ''Webcomic/DeanNalaVinny'', Vinny hates having to spend any time with his obnoxious cousin Marcello, as the latter teased him throughout their entire childhood. To make matters worse, Vinny's mom is completely oblivious to her nephew's antics, so Vinny just has to grind his teeth and take it when they are together..
* In ''Webcomic/{{Drowtales}}'' there are several examples among the noble family, since drow tend to have MassiveNumberedSiblings and encourage competition:

** Among the ruling Vel'Sharen clan the clearest example is between Chrys'tel and her cousin Nihi'liir, [[http://www.drowtales.com/mainarchive.php?sid=7015 clearest on this page]] and with the latter confirmed by WordOfGod to be a deliberate ShadowArchetype of the former. In their case it's clearly an extension of their mothers.

** 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.

* In the ''WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius'' episode aptly-titled "Clash of the Cousins", Jimmy has an antagonistic relationship with his cousin [[EnfantTerrible Eddie]], who is trying to destroy the Neutron family in order to get their money for himself.

* Clash and Video from ''WesternAnimation/{{Jem}}'' have gotten poorly all their lives. They were next-door-neighbors growing up as well. Their relationship seems to be an extension of the SiblingRivalry between their fathers.

** Early on, 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 (whom he sees as irresponsible) to trusting her judgement. [[spoiler:However, we find out that he helped Shuriki take over Avalor which led to Elena's parents getting killed by the sorceress, and as far as he knew, Elena seemingly getting killed too. Esteban did this because he felt like an outcast and wasn't listened to, but he didn't want any of his family to be hurt, and regretted this moment since. After getting them back, Esteban wanted to do everything he can to make sure he doesn't lose Elena or any of his remaining family, but still refused to come clean with his secret. And ''then'' after Elena finds this out and doesn't believe Esteban has changed when he explains himself, she ''actively'' attempts to hurt Esteban for it, resulting in Esteban going back to wanting to take over Avalor.]]

* Often TruthInTelevision throughout European history. European royal houses frequently married into each other for political purposes. By the 19th century, nearly all European royals were related in some way. When many countries ultimately went to war, cousins would often be on opposing sides. UsefulNotes/WorldWarOne is likely the penultimate example, where all the main great powers monarchs (Tsar Nicholas II of the Russian Empire, Kaiser Wilhelm II of the German Reich, King George V of the British Empire and Emperor Franz Joseph I of Austria-Hungary) were all cousins. In a sad irony, the close relationships had all resulted from marriages that Queen Victoria advocated, precisely to cause closer ties by the countries she hoped would prevent a war, but sadly it did not. Nicholas and Wilhelm were even friends, with the former begging the latter not to make war, but this didn't work. The {{strong family resemblance}} among them was even noted at the time.
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* This is implied in ''WesternAnimation/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]].

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

* In ''VideoGame/FireEmblemEchoesShadowsOfValentia'', [[spoiler:Alm]] fought against his distant cousin [[spoiler:Berkut]] for several occasions. However, they didn't know about their familiarity until the final act. [[spoiler:Once Berkut realizes that Alm is the son of Berkut's uncle Emperor Rudolf, and the true heir to the throne of Rigel, Berkut goes off the deep end.]]

* In ''VideoGame/FireEmblemEchoesShadowsOfValentia'', [[spoiler:Alm]] fought against his distant cousin [[spoiler:Berkut]] for several occasions. However, they didn't know about their familiarity until the final act. [[spoiler:Once Berkut realizes that Alm is the son of Berkut's uncle Emperor Rudolf, and the true heir to the throne of Rigel, Berkut goes off the deep end]].
* In ''VideoGame/PokemonGoldAndSilver'', Clair, the eighth and strongest gym leader, has a [[UnknownRival one-sided rivalry]] with her cousin Lance, the game's Champion. Since SecondPlaceIsForLosers she refuses to give up trying to beat him, though off the battlefield they've got a pretty good relationship.

--> '''Marie:''' I'm PLENTY nice, you know! I care about-\\

* In ''VisualNovel/PhoenixWrightAceAttorneyTrialsAndTribulations'', it is revealed that Mia's ArchEnemy [[spoiler:Dahlia Hawthorne]] is actually her cousin. [[spoiler:While Dahlia's mother Morgan despises Mia's mother Misty(Morgan's younger sister) for becoming heir to the Fey Clan in her stead, Dahlia doesn't care at all about Morgan's grudge against her sister, and instead hates Mia for getting her convicted of murder]].