History Fanfic / InstinctivelyFamily

* FighterMageThief: Pence, Olette, and Hayner have this dynamic in their choice of weapons. Pence uses a claymore, Olette uses a magical staff, and Hayner uses a Struggle Bat.

* LikeBrotherAndSister: Lea and Kairi develop this dynamic. It is even {{Lampshaded}} by [[WesternAnimation/RayaAndTheLastDragon Raya]] in ''Protective Instinct.''

* BadLiar: [[WesternAnimation/RayaAndTheLastDragon Sisu]]

* BigBrotherInstinct: ''Lea''. To the point where the first fic in the series has it as a title. Roxas and Xion are the main recipients of it, but he demonstrates it towards Kairi as well. He also has moments towards Naminé, Ventus, and several of the various Keyblade wielders.

* LikeBrotherAndSister: Lea and Kairi develop this dynamic.

* MistakesAreNotTheEndOfTheWorld: A subtle theme of this fanfic, subordinate but complementary to the theme of how trying to be extremely selfless will damage you. Lea is making up for past selfish actions, but swings too far in the other direction (being selfless to the point of refusing to acknowledge his own needs) and it results in fitful nights, a festering separation anxiety, and [[spoiler:a vivid nightmare so merciless that Lea wants to die]]. But rather than lose it all again (even if it's out of self''less''ness rather than self''ish''ness), [[spoiler:Lea gets a second chance at being open about when he's not okay and needs help.]]

** Lea and Kairi end up in [[WesternAnimation/RayAndTheLastDragon Kumandra]].

* DamnYouMuscleMemory: InUniverse. Lea keeps trying to block attacks with his arm because he's used to having two chakrams rather than one Keyblade.
* TheDogBitesBack: [[spoiler:Vanitas ends up in Sora's heart and helps him fight Master Xehanort.]]
* ExplainExplainOhCrap: Lea, when Roxas and Xion find out about parents, tries to say he’s nothing like a parent. But winds up realizing that what he did for them is basically what a parent would do.
* FakingTheDead: Like in canon, [[spoiler:Xigbar]] does this to avoid fading during the Keyblade War.
* ForWantOfANail:

''[[https://archiveofourown.org/series/1750927 Instinctively Family]]'' by Creator/BookwormGal begins during ''VideoGame/KingdomHeartsIII'', starting right during the endgame and it diverges initially due to [[ForWantOfANail two small changes]]: Aqua is forced to rest for a day before she goes to rescue Ventus and Vexen has Demyx sneak out ''two'' Replicas instead of one.

* {{Crossover}}: Moreso than the previous fics. Sora and Vanitas are in [[VideoGame/TheWorldEndsWithYou Shibuya]] near the beginning and end up in the Reapers' Game.

* SpannerInTheWorks: Lea. Repeatedly.
* TeensAreShort: Lea keeps lampshading how short all the Keyblade wielders are.

* ManOnFire: During a particularly bad nightmare, [[spoiler:Lea does this to himself]].

* TheOmniscient: [[VideoGame/TheWorldEndsWithYou Like in his canon]], Hanekoma refers to Joshua as this.

* Crossover: Moreso than the previous fics. Sora and Vanitas are in [[VideoGame/TheWorldEndsWithYou Shibuya]] near the beginning and end up in the Reapers' Game.

* ScienceFair: Chapter 28 (aptly titled "Science Fair") features Xion participating in one. She ends up placing second, [[RantInducingSlight which makes Even rant at the judges for underestimating Xion's intellect]].

* TheGrovel: Isa's [[PoseOfSupplication apology]] to Roxas and Xion for everything that he did as Saïx

* BattleInTheCenterOnTheMind: During his own version of Dive into the Heart, Lea ends up fighting [[EnemyWithin Axel]] near the end. [[spoiler:Though Axel ended up being less of an enemy and more Lea's subconscious trying to knock some sense into him.]]

[[VideoGame/KingdomHearts358DaysOver2 Once upon a time]], Axel ended up responsible for a couple of teenage Keyblade wielders who were [[YoungerThanTheyLook technically toddlers]] when it came to actual life experience. If he wanted to blame anyone for that, he should probably blame Saïx since he was the one who assigned him the task of keeping an eye on Roxas during his early zombie-like days. But then Roxas and Xion ended up his best friends. And he would have done anything to protect them. [[VideoGame/KingdomHeartsII And when he lost them, he tried everything to get them back.]] No matter the cost.

* Parents As People: Lea/Axel is closest thing Roxas and Xion have to a parent. But he’s well aware he’s made mistakes, in a desperate attempt to keep them safe despite not knowing how. And he has his own issues to deal with while taking care of the two.

* Explain, Explain…Oh Crap: Lea, when Roxas and Xion find out about parents, tries to say he’s nothing like a parent. But winds up realizing that what he did for them is basically what a parent would do.