History AdaptationRelationshipOverhaul / FanWorks

In canon, Ryuko and Nui are bitter enemies. Here, they enjoy a sisterly relationship.

* ''Webcomic/ScoobAndShag'': In can, Penny is WesternAnimation/InspectorGadget's niece. In the comic, she's [[spoiler:his creator and mental template]].

* In ''FanFic/AmazingFantasy'', Izuku is hospitalized from a spider bite the day the Sludge Villain attacked and never learns All Might's SecretIdentity or inherits One For All. Because of this, they never form the near familial relationship his One For All-wielding counterpart has. All Might's role as Izuku's mentor is instead supplanted by a universe-displaced [[Franchise/SpiderMan Peter Parker]].
* Happens in ''Fanfic/DariaInMorrowind''. Canonically, Sandi is the president of the Fashion Club and a rival to Quinn who pretends to be friendly. In the fanfic, the two openly dislike each other, and Sandi is not associated with the Fashion Club.
* ''FanFic/HarbingerFinmonster''

* ''FanFic/TheManyDatesOfDannyFenton''

** For Danny to be on dates with Gwen Tennyson and Violet Parr, the relationship with their boyfriends are either broken up or they just haven’t officially gotten together with them.
** [[spoiler: For Danny to be married to Kim Possible, her canon relationship with Ron never blossomed into romance]].

* ''FanFic/WeightOfTheWorld'':

* Seras and Integra were close friends by the end of ''Manga/{{Hellsing}}'', and she possessed UndyingLoyalty towards her master. In ''Fanfic/HoneyAndVinegar'', they're enemies/rivals and Seras only ever worked with Integra on an EnemyMine basis.

* In My Next Life As A Villainess All Routes Lead To Doom, Nicol Ascart, though having feelings for Katarina Claes, is content with remaining as a good friend due to Katarina being engaged to his friend Geordo, with any progress coming from his [[ShipperOnDeck sister Sophia]]. In [[https://archiveofourown.org/works/23106133/chapters/55282336?view_adult=true Windy Trees and Sweet Songs]], [[ForWantOfANail because Katarina landed on her head and regained her memories a day earlier than canon, she does not end up engaged to Geordo]], and she and Nicol ends up engaged after he sees her wanting to be friends with Sophia despite her albinoism (which was also one of the reasons why Nicol fell in love with her in canon).

* [=SpaceGodzilla=] and Godzilla III a.k.a Junior are antagonistic in ''Film/GodzillaVsSpacegodzilla'' with the former using the latter as a hostage to goad the second Godzilla into a fight. ''Fanfic/TheBridge'' shows them still in dire odds twenty years later [[spoiler:Until it's revealed [=SpaceGodzilla=] was GoodAllAlong and acting evil to try and tough up his "little brother". It takes a long time in Equestria with influence from its inhabitants and a near-death 2v1 fight against Grand King Ghidorah, but they eventually bury the hatchet]].

[[AC: {{Crossover}}]]

[[AC:Anime/NeonGenesisEvangelion]]

[[AC:Franchise/{{Pokemon}}]]

* ''Fanfic/TotalDramaRedemption'': In canon, Noah and Gwen had very little interaction, and neither seemed to have a particularly high opinion of the other. Here, Gwen considers Noah one of her best male friends on the show, and ends up in a relationship with him after breaking up with Trent.

** In World Tour, Cody and Heather formed a small friendship, while here, it lead to a relationship.
** In canon Duncan and Gwen broke apart because it's implied the spark between them died, with them lacking chemistry and affection at the start of All-Stars and finally breaking up. Here, their relationship has continued, and has become highly destructive, toxic, and abusive.
** Jasmine and Samey were friends much early in their lives, and that friendship lead to a secret relationship.
** In canon Dawn and Zoey were acquaintances. And while Zoey didn't dislike Dawn she did consider her creepy. In this story they are roommates and close friends.

* ''FanFic/XMen1970'': Canonically, Vera Cantor and Zelda Morton are two obscure ''Franchise/XMen'' secondary characters who vanished into comic limbo after the 60's. Here, they're dating Beast and Iceman respectively.

* ''Fanfic/CatRa'': While the general dynamic of Adora and Catra's relationship starts out the same, Adora's SanitySlippage and Catra's [[GoodIsNotSoft new sense of morality combined with her ruthless nature]] cause their relationship to become even worse than it was in canon.

* ''[[https://www.fanfiction.net/s/13463628/2/The-Rising-of-The-Four-Heroes The Rising of the Four Heroes]]'': Instead of being from different worlds, the heroes from The Rising Of TheShield Hero existed in the same world, even living in the same apartment before being summoned. In particular, Ren and Itsuki were childhood friends, while Naofumi and Motoyasu having known each other for a few years.

* In Fate Stay Night, Rin Tohsaka and Saber are good friends allies in the Fifth Grail War thanks to Rin's alliance with Shirou, and in their respective routes, the other [[ShipperOnDeck will support their relationship with Shirou]]. In ''[[https://www.fanfiction.net/s/11760463/1/Fate-Stay-Night-Heirs Fate Stay Night Heirs]]'', Rin is the one that summons Saber instead of Shirou, and their relationship goes from merely Master and Servant to a romance in full capacity.

* ''Fanfic/SonOfTheSannin'':
** The whole premise of the fic begins with Jiraiya and Tsunade becoming Naruto's adoptive parents (with Shizune as his older sister) and raising him since he was a baby, as opposed to meeting him when he's barely reaching puberty.
*** While all four are biological relatives due to the Senju and Uzumaki being cousin clans, Naruto is a part of the immediate family of Hashirama, Tobirama, and Nawaki because of being Tsunade's adopted son.
** Speaking of which, Tsunade and Jiraiya are a married couple in this fic.
** Shizune becomes friends with both Itachi and Shisui very early on in the story, when she never met either of them in canon. With Shisui in particular, their friendship turns to romance and they would later marry.
** Naruto and Hinata grow up as ChildhoodFriends, and they're already dating by the end of Part I.
** The Hyuga clan as a whole considers Naruto to be the son of a hero and treats him with a great deal of respect due to Tsunade having saved Hinata's mother's life. In canon their view of him was no different than anyone else in the village (prior to his and Hinata's marriage).
** Iruka never grows closer to Naruto than he does with any of his other students due to Naruto already having an adoptive family.
** Tsunade and Shizune's feelings for each other are explicitly that of [[LikeASonToMe a mother and daughter]] instead of the ambiguous aunt-niece/master-apprentice relationship they had in canon.
** The only thing Maki has in common with Matsuri, Yukata and Mikoshi is that the four of them are Suna ninjas. In this fic, the former is the latter three's Jonin-sensei.
** Naruto and Karin attended the Academy together and, while not incredibly close, treat each other as family. In canon they barely interacted at all.
** Naruto is ChildhoodFriends with the Sand Siblings, having met the three of them when Jiraya took him on a diplomatic mission to Suna in his youth. Gaara also has a good relationship with Temari and Kankuro from the beginning thanks to him being far more stable rather than mellowing out during the TimeSkip.
** Ino drops her crush on Sasuke early on [[spoiler:and takes to hate him due to her father being killed by his mother during the Uchiha Insurrection.]]
** Kiba and Tamaki met during their years at the academy and develop a rivalry that's dripping with BelligerentSexualTension instead of just meeting and getting together offscreen like in canon. Similarly, Choji and Karui face off during the Chunin Exams before becoming PenPals over the TimeSkip.
** With the exception of Team 10, all of the Genin teams are rearranged.
** Karin's crush on Sasuke was due to her thinking he was cute on her first day at the academy instead of a RescueRomance. As a result, she loses interest in him during the lead up to the Chunin Exam finals and simply cares for him as a teammate.
** Naruto and Sasuke develop a FriendlyRivalry instead of the volatile relationship they have in canon.
** Fu never interacted with any of the Konoha 11 in canon aside from when she was brought back as an Edo Tensei zombie to fight Naruto. Here she is friends with most of the Konoha 15 (in particular with Kiba and Tamaki) and ends up dating Shino.
** On a geopolitical scale, Kirigakure is allied with Konoha and Sunagakure long before the Fourth Ninja War arc thanks to Konoha having aided Mei's rebellion during the Kirigakure Civil War.
** Tenzo/Yamato in canon had most his interactions with Team 7. While he still keeps a degree of contact with Kakashi, he's not shown interacting notably with Naruto, Sakura or Sai. He also becomes the Jonin-sensei of a team that includes Hinata's younger sister Hanabi, while in canon he never interacted with her.
** Sai has very few interactions with Naruto, with his character arc instead being spearheaded by Ino.
** Danzo boasts during [[spoiler:his fight with Shizune and Shisui]] that he was a student of Mito Uzumaki. The identity of his jonin sensei in canon was never specified.
** [[spoiler: Toneri]] is inducted into the Akatsuki and is partnered with Orochimaru. In canon, he doesn't interacted with any of its members as a result of the organization being dissolved and its members, except Orochimaru, being dead by the time of his introduction.
** [[spoiler: Yakumo Kurama]] was recruited into Root and interacted with Danzo, whom she never interacted with in filler.
** Due to the combination of Sasuke never defecting to Orochimaru and [[spoiler: Kimimaro being cured from his illness]], Jugo not only never swore loyalty to him, but also doesn't know him.