fireflyfall
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Summary
“Did you know that the skies are fake?”
As a nine year-old former Khaenri’an prince, Kaeya knows many things they really shouldn’t. About Gnoses, for example. Their future adoptive family, for another. About the curse that has befallen their people, the secrets of several archons, the birds and the bees, the future of Teyvat as a whole... all thanks to their memories of a past life where they were a hot mess of a college student who had no idea what they were doing and played a certain popular gacha game.
Kaeya still has no idea what they are doing, and this time lives are riding on their decisions. As things stand, their adoptive father is doomed to die on their brother’s eighteenth birthday. So they have to figure out how to prevent a premeditated murder via Fatui Harbinger within eight years, while also hiding nearly every core facet of themself for their entire childhood - because Kaeya is so fundamentally terrified of rejection that they cannot reveal their true self to anyone. Not even the people they love and trust most.
Time does not heal all wounds. Not without proper treatment - and Kaeya, who never lets anyone know them in their entirety, has left theirs to fester.
Series
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a shitpost in an unforever number of parts by fireflyfall
Fandoms: Homestuck, Naruto, Harry Potter - J. K. Rowling, Danny Phantom, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia, 名探偵コナン | Detective Conan | Case Closed, 怪物事変 | Kemono Jihen (Manga), 怪物事変 | Kemono Jihen | Monster Incidents (Anime), 전지적 독자 시점 - 싱숑 | Omniscient Reader - Sing-Shong, Minecraft (Video Game), Video Blogging RPF, Dream SMP, Octopath Traveler (Video Game), キミガシネ | Kimi ga Shine | Your Turn To Die (Visual Novel), Batman - All Media Types, 原神 | Genshin Impact (Video Game), Avatar: The Last Airbender
15 Dec 2023
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Summary
Where I will post snippets of self-inserts that are just plot bunnies I can't shake or entertaining enough that they have been officially cleared to leave the deep, dark recesses of what most people will call a 'Google Docs'. This depends entirely on my mood and current fandom of obsession, so some may be single-scene one-shots while others might be vaguely continuous.
The Latest Shitpost:
(Detective Conan)
Shinichi hovers over the body. It’s been hours and it hasn’t stirred. Shinichi isn’t sure if it ever will. It feels weird to call the child lying on the ground an it, but that’s... basically what it is.
Because that’s Shinichi’s body. Ghosts are apparently real, because Shinichi is one now. Somehow, the poison he was force-fed had shrunken his body on top of ejecting his consciousness from it. His body, which is somehow still breathing despite Shinichi not being attached to it.
Then the security guards arrive, and his body wakes up.
Series
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Vision of the Miraculous by fireflyfall, GalaxyBreath
Fandoms: 原神 | Genshin Impact (Video Game), Miraculous Ladybug
22 Aug 2023
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The thing about being a teenaged superhero is that no one ever tells you how much it sucks. None of them would trade the friends they’d found in each other for the world, but it’s unbelievably stressful. Having to keep a secret identity while trying not to flunk out of school is already bad enough. Add on the fact that not even your teammates are allowed to know your identity, your supervillain being able to turn you against the city if you feel too much negative emotions about anything, and his ability to read his victims’ minds?
The heroes will be lucky if they defeat Hawkmoth before any of them graduate.
(Of course, Kaeya already knows his brother is the famous Ladybug hero Scararouge. Really, only a Ragnvindr could pull off that shade of violently red hair.)
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the bounds of spacetime cannot hold us down by fireflyfall
Fandoms: Minecraft (Video Game), Video Blogging RPF, キミガシネ | Kimi ga Shine | Your Turn To Die (Visual Novel), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia, Haikyuu!!, Harry Potter - J. K. Rowling, 原神 | Genshin Impact (Video Game)
20 Apr 2023
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Summary
For all my time travel AU's, reincarnation/transmigration-type crossovers, and basically anything that falls under the umbrella of time travel or dimension travel. And just crossovers in general actually.
Current Destination in Spacetime:
(Kimi ga Shine / Genshin Impact)
The Eleventh Fatui Harbinger lies before him, unarmed and completely defenseless. The red key Xingqiu had used to unlock his own restrains weighs heavy in the palm of his hand.
A bitter expression crosses Childe’s face. His empty blue eyes bore into Xingqiu’s very soul. “Ah. So you’re going to let me die.”
Xingqiu’s hands curl into fists. The edges of the key dig into his palm. “I didn’t say that.”
“I can see it on your face, comrade. You’re considering it.” Childe smiles. Xingqiu hates it. He’s seen a plethora of fake smiles from the Harbinger before, but even those had some kind of substance to them. The smile on his face now is just... empty. “I can’t say I blame you.”
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Summary
Life as Gamzee Makara isn't exactly the happiest one. It's certainly not the worst, but- it's not great. It doesn't help that they're wholly unaccustomed to the merciless brutality of the Alternian lifestyle, too used to the idyllic peace of a suburban Earth town.
Most trolls are hardened by their harsh circumstances. Violence is natural to them, because they have never known anything else. Gamzee has. They know the world can be better - have lived in a world where things are better - and that makes it difficult to cope.
And as if that weren't enough already, the imminent Doom of the timeline looms over their head - their very existence threatens the lives of everyone they have ever known. If they don't keep things the same, their timeline will diverge from the Alpha and everyone will die. And they will have no one to blame but themself.
No matter how desperately they wish to, they can't save everyone. It's all that Gamzee can do to preserve the livelihoods of the few who are destined to survive.
Series
Recent series
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the far too many self-insert aus, the infinite electric boogaloo by fireflyfall
Fandom Avatar: The Last Airbender, Batman - All Media Types, Danny Phantom, Dream SMP, Harry Potter - J. K. Rowling, Homestuck, Minecraft (Video Game), Naruto, Octopath Traveler (Video Game), The Magnus Archives (Podcast), Video Blogging RPF, Villain to Kill (Webcomic), キミガシネ | Kimi ga Shine | Your Turn To Die (Visual Novel), 亜人 - 三浦追儺 & 桜井画門 | Ajin - Miura Tsuina & Sakurai Gamon (Anime & Manga), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia, 原神 | Genshin Impact (Video Game), 名探偵コナン | Detective Conan | Case Closed, 怪物事変 | Kemono Jihen (Manga), 怪物事変 | Kemono Jihen | Monster Incidents (Anime), 빌런투킬 | Villain to Kill (Webcomic), 전지적 독자 시점 - 싱숑 | Omniscient Reader - Sing-Shong
10 Nov 2025
Summary
What it says on the tin.
AKA: somewhere for me to gather all of my posted self-inserts in one place, because i'd never be able to keep track of them all otherwise. (I really need to start branching out into other genres that aren't my well-worn niche of obscure self-inserts lmao.)
- Words:
- 166,226
- Works:
- 12
- Bookmarks:
- 103
Recent bookmarks
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The Void Blinks Back by JusticyWusticy
Fandoms: Batman - All Media Types, Batman: Under the Red Hood (2010)
10 May 2026
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Summary
Tim gets stuck in shift often so he has plans for all kinds of situations. Jason really wants to know why the Drakes left a kitten all alone and where his replacement is.
YOTP 2023 September,
Prompts: Hurt/Comfort, Shifter AU,Series
- Part 10 of YOTP 2023
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Citrine Isles by Diatomic_Rex
Fandoms: Pocket Monsters | Pokemon - All Media Types, Pocket Monsters | Pokemon (Anime), Pokemon Mystery Dungeon
09 May 2026
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Summary
When their blimp ran into the storm, Ash, Misty, and Brock found themselves in a strange land where the Pokémon there see humanity as pests and enslavers. Now, having turned into Pokémon themselves, their only hope to return home is to participate in their local Pokémon League equivalent. All the while, the nature of what separates Pokémon and trainer blurs.
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Hey, can I borrow your Chosen One? by KaramellKitty42
Fandoms: Pokemon Mystery Dungeon: Explorers of Time & Explorers of Darkness & Explorers of Sky, Pocket Monsters | Pokemon (Anime)
09 May 2026
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Summary
Ash has seen a lot and been in many situations.
So waking up floating in a black void with Pikachu clinging to his shoulder when he distinctly remembered going to bed before wasn’t that weird or shocking.Or, Ash and Pikachu in Mystery Dungeon, unfortunately separated, trying to find each other while also saving the world.
...at least they have experience with this kind of thing. -
Sometimes a home is a child inventor, her robot sister, and a sinner with amnesia by LavenderTownsGhost
Fandoms: 原神 | Genshin Impact (Video Game)
08 May 2026
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Summary
More than a year before the Rächer of Solnari is pieced together and begins his attack on Nod-Krai, a heavily wounded man is found unconscious at a crater left by the ‘Boom and Blast Kuuvahki Cannon’. All he can remember is his own name, and the drive to find someone named “Tholindis”.
Aino feels guilty over the harm her invention inadvertently caused, so she offers him a place to stay while she builds him a new arm. As Rerir finds his bearings within Nasha Town, he wonders if this is what it’s like to have a ‘home’. But as his memories slowly return, and he remembers more of what he did in the past, he wonders…
Does a Sinner even deserve peace?(Updates Thursdays)
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Gaggle of Bastards by Nation_Ustria for NyxAeternus23
Fandoms: Batman - All Media Types, DCU (Comics)
28 Sep 2025
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Summary
Onscreen, the reporter does the typical introduction spiel, then turns to the party crasher. “You and your associates have been remarkably candid about who you are while you’ve crashed galas all over the tri-state area tonight, but would you introduce yourselves one more time, this time for the record?”
The party crasher grins, bright and mischievous, but there’s a glint in his eyes that makes some part of Bruce think predator. “Sure thing! I’m Jason Todd-Wayne, and me and the others are Bruce Wayne’s gaggle of bastard children.”
Bruce chokes.
~
Thanks to a magician landing a lucky shot, all memory of the Batkids gets erased from the world.
They decide to make it absolutely everyone’s problem.
- Language:
- English
- Words:
- 7,913
- Chapters:
- 1/1
- Collections:
- 7
- Comments:
- 61
- Kudos:
- 1,693
- Bookmarks:
- 432
- Hits:
- 7,970
Bookmarked by fireflyfall
06 May 2026