Kastaborous
Fandoms
Recent works
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visited yharnam. 0/10, came back wrong by Kastaborous
Fandoms: Biohazard | Resident Evil (Gameverse), Bloodborne (Video Game)
26 Jul 2026
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Summary
Some various connected and unconnected oneshots following the same premise as my story "a nightmare? this is a tuesday" where Leon visits Yharnam, but focused on a theoretical aftermath where he comes back wrong, either slightly more Bestial than he started or with an added dose of Kos-flavored Milkweed Rune.
Inspired (and conspired) in varying degrees by and with polarspaz’s Bloodborne Leon AU.
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How to Do Foreign Diplomacy, by Amestris by Kastaborous
Fandoms: Fullmetal Alchemist - All Media Types, Fullmetal Alchemist: Brotherhood & Manga, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
27 Jul 2026
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Alphonse hears about cat cafes and declares he’s going to the Outside, legality be damned. Edward decides to do his method of diplomacy and revolution is hastened. The U.A. faculty and other assorted individuals hear about a certain alchemist joining the military at 12. The Elrics are the hotline for living philosopher’s stones. Truth takes a vacation.
Or, some assorted scenes and situations that aren’t part of the main fic, “How to Solve a Murder and Incite a Rebellion” but are wonderful and hilarious nonetheless.
…
These didn’t happen in the “canon” plot of the main fic, but feel free to imagine them in a spin-off verse
Series
- Part 2 of Of Heroes, Villains & Alchemists
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the resident evil creature features by Kastaborous
Fandoms: Biohazard | Resident Evil (Gameverse)
23 Jul 2026
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A collection point for various connected and unconnected Resident Evil oneshots that involve turning characters into creatures, as well as snippets for other non-plague of carapace “infected AUs” I wanted to write for!
So far this includes nearly 8K words worth of “Noodle Leon” by polarspaz, Verdugo Leon by bruhsoundeffect, and a few others!
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a nightmare? this is a tuesday by Kastaborous
Fandoms: Biohazard | Resident Evil (Gameverse), Bloodborne (Video Game)
16 Jun 2026
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Summary
Leon is getting too old for this shit. He is (somehow) a full fifty years old. And he’s been wading into bloodsoaked warzones to fight monsters for thirty years. At this point, very little surprises him anymore. But falling through a blood puddle and waking up in a Victorian gothic nightmare is pushing it.
But nonetheless, it’s familiar. Monsters stalk the streets, the smell of blood so thick he can taste it.
Leon sighs, rubbing his face. “Just another Tuesday.”
…
Or, Leon S. Kennedy post Resident Evil Requiem gets dropped into the city of Yharnam. It goes better and about as bad as you think. (No knowledge of Bloodborne required!)
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nymph (and a rookie in raccoon) by Kastaborous
Fandoms: Biohazard | Resident Evil (Gameverse)
25 May 2026
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Summary
In biology, a nymph is the juvenile form of some invertebrates, particularly insects. Rookie Leon S. Kennedy, in Raccoon City in the midst of the worst night of his life, is not an insect. Until he is, at which point his usual story takes a sharp left turn and goes straight off a cliff.
Or, an AU of an AU where Leon, in the middle of Raccoon City, gets infected by a plaga six years too early. Becoming a monster in a city filled with them is terrifying enough, but when your options are adapt or die, you take what you can to survive. Plus, it has its perks. Being bite proof is one of them.
(This is self-indulgent and I'm writing snippets non-chronologically, so don't be surprised if chapters move around.)
Series
- Part 2 of the bugverse
Recent series
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Summary
Or, all my nonsense relating to bug leon. No, I don't know why its infected my brain like this.
Inspiration AUs in no particular order:
- InfectionRE AU
- RookieBug AU
- Biblically Accurate Bug- Words:
- 85,747
- Works:
- 3
- Bookmarks:
- 24
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- Words:
- 76,577
- Works:
- 2
- Bookmarks:
- 57
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The Wilds of Hyrule, Old and New by Kastaborous
Fandom The Legend of Zelda & Related Fandoms, The Legend of Zelda: Breath of the Wild, The Legend of Zelda: Breath of the Wild/Tears of the Kingdom, The Legend of Zelda: Hyrule Warriors
15 Apr 2026
Summary
Hyrule is a very, very old place. It has history stretching back tens of thousands of years, across multiple timelines. It, and it's residents, are frequently a little more than they first appear.
- Words:
- 8,595
- Works:
- 6
- Bookmarks:
- 71
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you, me, and god makes three by Kastaborous
Fandom Fullmetal Alchemist - All Media Types, Fullmetal Alchemist: Brotherhood & Manga
26 Mar 2026
Summary
An unconnected assortment of my various FMA fics with a heavy focus on Ed, Truth, and assorted silly / existential times.
I have a few more ideas floating about for future stories, so check here for them if you're interested.
- Words:
- 35,838
- Works:
- 4
- Bookmarks:
- 550
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Of Heroes, Villains & Alchemists by Kastaborous
Fandom Fullmetal Alchemist - All Media Types, Fullmetal Alchemist: Brotherhood & Manga, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
27 Jul 2026
Summary
In unearthing the Nomu Factory, the Heroes and police of Japan discovered a body. This was not unexpected, but the nationality and uniform of the corpse in question… that was. Because this failed Nomu wore the uniform of Amestris, a war torn nation from the isolated continent of Atossa, where Quirks and modern electronics had never developed and never worked.
Edward Elric hoped he could retire from military service in peace, traveling Amestris while his brother Alphonse went to Xing. This is put on hold when now-Führer Mustang asks him to travel to the Outside, to the world beyond that was barricaded for centuries after the development of something called ‘Quirks’. A soldier has been killed and Amestris needs to know more about the Outside.
Or, Edward Elric and Amestris meet the world of Heroes and Villains.
- Words:
- 189,759
- Works:
- 4
- Bookmarks:
- 692
Recent bookmarks
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I didn't change for good this time by itsElli
Fandoms: Biohazard | Resident Evil (Gameverse)
24 Feb 2026
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Tell me, Leon, people can change, right?
Or,
The fall of Leon S. Kennedy, from 1998 onward.Bookmarked by Kastaborous
02 Aug 2026
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Summary
Instead of his gun jamming, Ashley (under Saddler’s control) successfully shot Leon, killing him. Leon should be dead — except he’s woken up chained to Luis again, back at the beginning of his mission.
Leon has been given a second chance (and many more, he would come to find out) to save Ashley and Luis. And he’d do whatever it takes to make sure they survive and escape from Valdelobos, no matter the cost.
Bookmarked by Kastaborous
01 Aug 2026
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Captain R███████ of the BSAA by tired_demonspawn_ao3
Fandoms: Biohazard | Resident Evil (Gameverse)
02 Jul 2026
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Summary
Whenever Grace was feeling down, she liked to imagine all the different ‘R’ Commanders, Captains and Operatives as the same mythical “superhero” BSAA soldier. It felt nice to imagine (if only for a moment) that wherever a bioweapon would spring up there would be an immovable soldier to meet its unstoppable force, saving the day.
But of course, no one person could do all that.Or:
The one where Grace cannot believe all the redacted BSAA Captains are the same guy who, along with his husband, highk kinda adopted her.
Originally thought of as a 5+1 but then I lost the plus one and gained the power of familial love instead.Bookmarked by Kastaborous
31 Jul 2026
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Summary
Waves come to the shore, waves go back to the ocean.
Sand watches on as they keep moving.
Leon has family and said family comes back to his life. It might not be a bad thing after all.
- Words:
- 76,471
- Works:
- 4
- Bookmarks:
- 19
Bookmarked by Kastaborous
24 Jul 2026
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Summary
“What are you talking about?” Grace's fingers played quick chords as he spoke. He didn’t even look as he did it, but it did not make them any less purposeful.
“Discussing possible reasons why Tau Ceti is not infected while other stars are,” Eva replied deftly. “I would invite you to join, but we were just finishing—”
“Oh, that’s easy.” His hand twisted a knob, and the notes came out sharper. “It is infected—Petrova Line and everything.”
In Grace's opinion, dreaming about time traveling is no excuse for getting out of practice with his Eridian. To the rest of the Petrova Taskforce, it seems a bit odd that their resident Astrophage expert has suddenly taken to carrying a keyboard around and playing it whenever he speaks. Eva Stratt resolves to figure out what is going on.
- Language:
- English
- Words:
- 83,672
- Chapters:
- 18/23
- Collections:
- 41
- Comments:
- 11,252
- Kudos:
- 24,050
- Bookmarks:
- 6,688
- Hits:
- 371,332
Bookmarked by Kastaborous
10 May 2026