My main gripe with a lot of these stories is the OC becomes a fix-all for the plot. Finding one where the OC has believable flaws and their outsider status creates new problems instead of solving old ones is rare. I look for authors who aren't afraid to let their OC fail or make things worse. That usually signals better writing. Check the reviews on FFN or the comments on AO3 for stories you find—if readers are debating character choices and consequences, that's a good sign.
Honestly? Tumblr. It sounds weird, but a lot of writers I follow post snippets, concepts, and links to full stories on AO3 or Google Docs right there. The tagging system is chaotic but if you follow blogs that reblog a lot of 'AoT' fanart and meta, you'll stumble upon OC crossover stuff in the mix. The advantage is you sometimes get to see the author's thought process and worldbuilding in their posts, which can be a good indicator of depth before you commit to a longfic. The downside is it's not centralized at all, so it's more about curating your dashboard than searching efficiently.
I'd recommend searching by specific crossovers you're interested in. Broad 'OC crossover' searches bring up everything, including some real duds. If you're into, say, 'AoT' crossed with 'The Witcher', search that pairing directly. The smaller, more niche the crossover, the higher the chance the writer is deeply invested in both worlds and puts in the work to merge them cohesively. Often, those stories have better character integration because the author is a fan of both canons, not just using one as a backdrop.
If you're hunting for 'Attack on Titan' OC crossovers, the Archive of Our Own tag system is probably your best starting point. Filter by the 'Crossover' fandom and add 'Original Character(s)' as an additional tag; that combo usually pulls up a good chunk of them.
That said, well-written ones can be a bit of a treasure hunt. A lot of authors sort of throw their OC into the plot without much thought. The ones that stand out to me are usually the ones that treat the crossover element seriously—like, how does this character's presence or their world's magic/tech fundamentally shift the power dynamics within the Walls? I've read a few where a character from a modern-setting fandom ends up in Paradis, and the author explores the cultural shock and knowledge disparity in really cool ways. Those tend to feel more substantial.
Platform-wise, FanFiction.net still has a massive backlog, but sorting for quality there is harder without extensive use of favorites/follows as a metric. I'd cross-reference there after checking AO3. Don't overlook smaller forums or dedicated 'AoT' fan sites either, though activity might be slower. The writing quality often correlates with how detailed the author's planning seems in their author's notes, I've found.
Try looking for 'Self-Insert' stories too, even if that's not exactly what you want. A lot of SI fics are essentially OCs, and the community around them often has high standards for worldbuilding and canon adherence. The 'AoT' SI community on SpaceBattles or Sufficient Velocity forums produce some extremely detailed, almost analytical crossover narratives that treat the setting with a lot of respect. The prose might be more functional than poetic, but the ideas are usually solid.
2026-07-17 13:10:18
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***************Read With Holy Water, A Priest, And Your Ancestors On Speed Dial From Chapter 40.⚠️******************************************************************
Twenty years ago, three Alpha Kings slaughtered my entire Omega clan. My parents were among the dead, along with my twin brother. But the Moon Goddess had other plans.
She cursed their unborn sons, binding all three to a single fated mate they must claim before their twentieth birthday.
Or die.
I am that mate.
And I came here for revenge.
Rhydian rejected me the moment the bond surfaced. Yet he cannot seem to stay away.
Tavian believes he is always one step ahead. He has no idea I am the one guiding the game.
Astarian offers a kindness so genuine it unsettles me more than either of them.
I am the last son of Kaida, leader of the slaughtered Omega clan. I can shapeshift, bend wills, and bring three Alpha heirs to their knees without ever drawing a blade.
My revenge was perfectly planned.
Until the mate bond changed everything.
Because the closer I get to destroying their fathers, the harder it becomes to ignore what I feel for their sons.
Now vengeance, destiny, and loyalty are on a collision course—and only one can survive.
*****Dark revenge themes. Violent battles. Dangerous secrets. Three Alpha heirs who will keep you turning pages. And an Omega determined to bring an empire to its knees.*****
When journalist, Bella Sinclair, was invited to a friends birthday celebration in the local bar, she imagined there would be drinking, dancing, and letting her hair down. What she didn't imagine- being sexual assaulted.Biker Alex 'Axel' Warner wasn't happy. He was supposed to be back in his clubhouse for the weekly party held by the club. He was supposed to be drunk, with the clubwhores begging for his c***. Instead, he was serving alcohol to a bunch of drunken adults, some behaving like children. That is until he spots the beautiful redhead dancing with her friends. What will happen when the two meet?Will Axel be able to protect Bella?Will he be able to protect her from herself?
You think I care about titles?” he asked, stepping even closer until I could feel the heat radiating from him. “Do you think that matters to me?”
“It should,” I said, my voice breaking slightly. “It matters to me.”
He tilted his head slightly, studying me. "Why? Why does it matter so much to you?"
“Because,” I said quickly, searching for the right words. “Because people like me... we don’t belong with people like you. You’re... you’re powerful, and I’m—”
“Beautiful,” he cut me off, his voice firm.
I froze, my words dying on my lips. “What?” I whispered.
“You’re beautiful, Sophia,” he said again, his tone softer this time. “And I’m tired of pretending I don’t notice it. You think being a maid defines you, but it doesn’t. Not to me.”
Kirsty had a troubled past.Now she's in trouble again.Last time she had her sister, but her sister can't help her again.Who will she ask to help her escape from her tormentor?Tank has had a rough couple of months.He was shot, his sister had been brutally beaten and now he's been dumped by the he has been casually seeing for the past 6 months.Will anyone be caught in the fallout of the crossfire?Two worlds collide when Tank is forced to babysit Kirsty. Can they turn the hate into something more?Or will the rose wither and die?
David Kennedy, an art student and part time tattoo artist, meets the shy and beautiful Tina Spencer at a party at the college he attends, after she asks him for a tattoo.
He is immediately enthralled by her.
Something doesn’t feel right though, especially when he sees the nasty bruises covering her arms.
Then Tina goes missing.
The years go by, and he still thinks about her.
Then one day, fate intervenes, and he finds himself face to face with the beautiful woman he tattooed all those years ago. But she has some devastating secrets.
Where has she been this whole time?
Will David ever get the chance to heal her?
Will they get the happily ever after she needs?
This is a book of shifter short stories. All of these stories came from readers asking me to write stories about animals they typically don't see as shifters.
The stories that are in this series are -
Welcome to the Jungle,
Undercover,
The Storm,
Prize Fighter,
The Doe's Stallion
The Biker Bunnies
The Luna's Two Mates