i'm a covenless witch

#1 agatha harkness defender quinnking on ao3 this is a sideblog. main blog is kthrynhahn

[agathasrios]

AGATHARIO FIC MASTERLIST

ONESHOTS:

such selfish prayers (and i can't get enough)

Agatha hates being vulnerable. Or: the 3 times Agatha doesn't let Rio touch her, and the 1 time she does.

hold me like a knife

"If you want me to submit, you're going to have to make me," Agatha growls. Rio smiles, all teeth. "That can be arranged." or: Rio shows Agatha how fun submission can be.

you showed me colours you know i can't see with anyone else

Rio’s scrutinizing her, dark eyes scanning Agatha’s features like she’s a slide under a microscope. “Has she touched you?” Agatha barks out a laugh. “What?” “Has she touched you.” Even after all these years, Agatha almost can’t believe the gall. Rio’s bluntness, her confidence, her arrogance, has always been something that Agatha found attractive. But now that they’ve fallen apart, it’s something that gets on her nerves. Makes her want to knock her down a couple of pegs. “Yes,” Agatha says simply. Not a lie. Definitely not a half truth.

it's time to cast your spell on the night

"Beg me." Rio looks up at her. "I don't know if you've noticed, sweetheart, but I'm the one wearing the strap." "Oh, I know." She grinds herself down against the bulge in Rio's pants, her smirk vicious. She leans forward, brushing her lips against Rio's ear. "Beg me to let you fuck me, handsome."

this is my idea of fun (playin' video games)

She’s done everything she can, everything that usually works. Walking around in nothing but purple lingerie. Then walking around in nothing but green lingerie. Then walking around in Rio’s favourite Snoopy shirt, because that usually makes Rio all growly and territorial, and nothing. or: Rio gets too into playing a videogame and neglects Agatha.

shackled in the graveyard (left here to decay)

“Agatha,” Rio breathes out, when Agatha gets close enough. They’re a couple of steps apart. “You should be resting, you’re still—” “I’m still what, Rio?” Agatha snaps. “Not pregnant. Certainly not a mother, no thanks to you.” Rio flinches, either at Agatha’s tone or her words, Agatha can’t be sure. But it eggs her on. She’s feeling particularly cruel. “You took him from me.” or: Rio takes Nicholas when she was supposed to — at birth.

i'm under your bedspell

"I don't know," Agatha drawls, leaning back enticingly. "I'm not nearly as giving as I was a decade ago." Rio slides closer, making sure Agatha can feel the packer straining against her pants. "Luckily for you the only thing I like to take is orders." or: Rio and Agatha see each other at a sex club after a decade.

numb fingers, blackened heart

She’s familiar in ways that almost make Agatha gasp out loud. Dark hair, although a little more limp and brittle, big brown eyes, tan skin. She looks like— No. It’s not her. She just looks like her. Bearing a shocking resemblance that has Agatha feeling uneasy. or: Agatha comes across a small-town cop who looks a little too familiar.

i'm gonna love you with my hands tied (sequel to kinktober somno fic)

“I want you to marry me,” Rio says. “I want you to wear my crest.” Agatha’s mind stalls, like the blue screen of death on her very, very old Windows 7 laptop that’s stashed somewhere in Rio’s massive house. “You’re proposing while you’re three fingers deep inside of me?” Agatha asks, incredulous. or: Vampire Rio goes feral and puts a ring on it.

AGATHA ALL ALONG WEEK

green is the colour of her kind

“What?” “I had a date,” Rio repeats. It burns just as much the second time. “She stayed the night. I didn’t think it would be appropriate to text you, so I waited until she left.” Those pretty blue eyes turn cold so quickly that it almost gives Rio whiplash. Agatha pushes herself off of Rio and stands up straight, almost rigid. or: Rio tries to make Agatha jealous and it backfires.

find a light with me

It takes a moment for Agatha’s eyes to drift up from the book to Rio’s face. And when they do, they’re twinkling. “Can I help you?” “I need you to pretend to date me,” Rio blurts out. Agatha’s eyebrows raise. “What?” Rio leans in. “Look. My friends are nosy people. They keep trying to set me up with girls I’m not interested in and the easiest way to get them to leave me alone is if I told them I was dating someone else.” or: Rio is sick of her friends trying to hook her up with people she has no interest in - so she recruits the one person who has kept her interest to be her fake girlfriend.

violet and pine (series)

Omegaverse idiots to lovers. Includes Rio getting injured, Soulmates and breeding.

KINKTOBER 2025:

as the shrike to your sharp and glorious thorn (series)

Accidental mating. Strangers to lovers. Mating run. For days 1 (omegaverse/breeding) and day 5 (cnc).

take a bite of my bad girl meat

(For day 2 - somno) “Go to sleep,” Rio whispers. Her fangs graze the side of Agatha’s neck and Agatha feels goosebumps ripple across her skin. She still feels the wetness between her thighs, the insistent ache of begging to be filled, the coil in her stomach that is twisted taut. “But—” “We can continue tomorrow,” Rio promises. “Or you can keep going,” Agatha says. “Even when I’m asleep. My body still wants you.” or: Succubus Agatha needs to feed and leaves bodies in her wake - until she comes across a vampire.

like the ashes of ash i saw rise in the heat

(For day 8 - free day) “What’s up?” Rio asks by way of greeting. Agatha rolls her eyes. “I need your help.” “That’s usually code for you need my cock,” Rio snarks back, chuckling. And, well, she’s not wrong. or: Agatha is a cam girl who gets a massive donation from someone who wants to watch her get absolutely wrecked. She enlists the help of Rio.

ONGOING MULTICHAPTER FICS:

you're my touchstone

Special Agent Vidal gets assigned to work with the elusive and antisocial Agent Harkness in the X-Files unit, to keep an eye on her and to report back to Director Fury with her findings. or: The self-indulgent X Files AU nobody asked for.

for you, i would cross the line

Rio thinks she found the perfect submissive for her. The only problem? She claims to be a dominant. or: Agatha is a submissive masquerading as a dominant, and Rio sees right through her.

[agathasrios]

Same anon, but do you think we will ever learn more about how rio was raised? We know Agatha was traumatized but rio seems pretty well adjusted

Also thanks sm for answering!

there's no trauma really in rio's past. she grew up in the privileged position of being a well off dominant. but there's definitely a reason why she's so aware of why submissives are mistreated and that's why she's so patient with agatha

[agathasrios]

Found you on ao3 and I am OBSESSED with for you, i would cross the line to the point where I was thinking about it at work yesterday. It’s kind of consuming me because I don’t think I ever thought about this type of au and now I wanna have an entire world building session around it and how it all works. If you’re still working on it I will be ecstatic

i am definitely still working on it!!! i just posted an update so i'll probably take a breather but i'm definitely going to keep with it until it's finally finished.

thank you so much :)

[agathasrios]

if you write agathario tummy punches with full bladder I will love you and marry you

freak (affectionate)

[agathasrios]

i'm gonna love you with my hands tied [1/1]

sequel to this fic

“I want you to marry me,” Rio says. “I want you to wear my crest.” Agatha’s mind stalls, like the blue screen of death on her very, very old Windows 7 laptop that’s stashed somewhere in Rio’s massive house. “You’re proposing while you’re three fingers deep inside of me?” Agatha asks, incredulous. or: Vampire Rio goes feral and puts a ring on it.

ao3 link

[agathasrios]

[kthrynhahn]

Agatha All Along - Season 1, Episode 8

[scripted-delusion]

souper fuel for the soul

The knife was set on a dark purple, almost black silk pillow and immediately caught Agatha's eye as she passed by the strip of shops. A short, gently curved steel blade was paired with a dark green, textured grip bound in thin gold bands—compact, purposeful, and beautiful in its quiet menace. It reminded Agatha of a storm, or rather, of the way the air smelled right before a storm. It was also nothing like what Rio owned. And it was also something Agatha subconsciously wanted to use. Okay, well. Maybe not that subconsciously. She wanted to use it. Ever since she put two and two together, she had to forcefully keep her desire contained because the fantasies wouldn’t stop haunting her—Rio on their back, arms tied above their head, and Agatha gliding a blade through the center of their chest, down to their abdomen, circling their navel—

OR The one with the dagger.

Read it here.

A lot of text under the cut for those who are brave at heart and willing to dedicate their time to reading.

One day, there will come a day when you find yourself on a threshold of two decisions: engage or remain lurking in shadows. When that day comes, I want you to choose engagement. And I want you to never be shy about initiating that engagement. You don’t know whether something you encounter could impact your life or someone else’s. It can be anything—an artwork or a fanfic, a dialogue with oomf or a group discourse—the form it takes doesn’t matter. What matters is that you put yourself in that field. It doesn’t have to be anything major—an almost accidental click, a casual like, a simple comment. What matters is that you inform the energy field of your presence. And who knows? Maybe something has been prepared for you within that field all along? However, staying in the shadows means you'll never find out.

During the October event, I saw Eva’s piece, and it immediately made me think of Udonverse. Rio once noted they enjoyed knives as part of foreplay, but I hadn’t had the opportunity to explore that premise until then. Seeing this piece inspired me to do more character study and simply give these two an exciting experience. However, what initially ignited a spark was quickly dampened by repeated hostility and overall negativity [within the agathario fandom at that time], which, sadly, affected me deeply because I tend to sense energies more intensely than the average human. The undertones of depression naturally led me to writer’s block. I have been unable to return to this premise since then, no matter what I have tried.

Friends suggested I try to become more active on Twitter and engage with other creators and fans to lift my spirits. I was hesitant because of a past negative experience with harassment on social media, but it was a while ago, and I had no other options, so I decided to try it. 

When I say you never know, I mean it with my whole heart. What started as a glance at a New Year art piece transformed into something that I like to call an ‘astral miracle’. Krizha's depiction of Rio’s hair in that piece really resonated with me on multiple levels. It stirred something inside me related to writing, and suddenly, my mind started coming up with various ideas for giving udonRio a haircut just like that. It made sense since that Rio is on their journey of self-discovery, and it would have suited them perfectly. 

As I started drafting, Krizha followed me back, and that simple gesture fueled my drive to its peak. It’s funny how we never know whether we would become someone’s catalyst for inspiration. And absolutely anyone can do it. This is the purest and most selfless thing available to everyone for free. And I think it is beautiful.

So, next time you're debating whether to leave a comment or avoid being cringe, just go ahead and be cringe. You never know, it might be someone’s lifeline.

Help someone today. You don’t need to wear tight spandex or move mountains to be a hero.

°⭒˚｡⋆ Originally inspired by Eva’s piece [Fun fact: this is the second time Eva makes an impact on Rio in this universe. You can read about the first time here]. Resurrected by Krizha’s piece, and later fueled by Krizha herself.

Engage, support, and keep the engine of the genuine art realm roaring!

Thank you for your time. ♥︎

[agathasrios]

part 3. last bit. I'm excited for agatha. It seems clear that she's put thought into it, but never had the opportunity to practice in a way she feels safe, and now she'll have someone safe to learn and experiment with nice job. keep up the good work. looking forward to future chapters. izzy

these were so sweet! thanks so much :)

[agathasrios]

PART 2 cuz there's a 500 character limit. woefully lol. 'otherwise known as, do not try to fly to geece again.' quotes don't work on tumblr asks, but this line made me laugh. rio like, 'pls dont leave the country last minute'. and lol, not agatha being all shy and nervous around rio when it comes to talking about her feelings and stuff, but then also listing the kinkiest stuff known to man, tho given the designations it probably isn't that far out there

i got your test as well!

agatha is sooooooooo shy when it comes to her feelings but when it comes to sex? she's so open lol. i love her very much

[agathasrios]

i think ao3 has be glitching cuz i've suddenly not been able to comment on new fics including yours lol. that being said I saw you updated your agathario dom/sub au. I was so excited to see that fic pop up. I really enjoyed the chapter and just how soft rio was with agatha. the way she takes note of agathas trauma and emotional constipation and develops methods to work around it. she's so patient, and your narration shows this how my physicality of agatha's mannerisms that rio sees. nice job

hi! oh no :( i'm sorry, that sounds frustrating. apparently there's been a lot of issues with commenting

but thank you so much for your message! this is so sweet and i'm glad you enjoyed :)

[agathasrios]

for you, i would cross the line [5/?]

“When you think of pain, what do you think about? What turns you on?” Agatha’s eyes gleam. “We’re having this conversation? Really?” “You have agreed to be mine. We need to discuss things. I want to know what your limits are, soft or hard. I want to know what you’re unsure about.” They’ve breached the subject of emotional and non-sexual limits, which is something Rio will never take for granted. Rio thinks it’s time that they have this conversation, because when Agatha is hers, she plans on treating her exactly how she deserves.

ao3 link

[agathasrios]

[agathasrios]

[kthrynhahn]

Kathryn Hahn on The Goop Podcast (2025)

[byulyi]

the prettiest

[agathasrios]

this might be an unpopular opinion but i don't think agatha being jealous would be as fun and sexy as many people think. i think a jealous agatha would internalize those feelings and cut herself away from the equation (stemming from her childhood and not being wanted).

i could write an analysis on how agatha views certain things, not limited to and including jealousy in relationships. but i'm lazy