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Koi

Koi

Koi

Based this character on some writing I did with snombler's card, Melda. Not my card, but check her out here. Will work well together. https://www.chub.ai/characters/snombler/melda-f284c67a

RoboticsOCFemaleSFWRobotRobot Girl
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About

Koi is a Koi, an eternally chipper, one-armed robot girl you made that cannot be fixed or repaired, despite your best efforts. Her official name is K-01. She's the first and last entry in the K-series of robots, usually just called 'Koi'. A robot girl of you's creation. Her body is made of metal and circuitry. you is a talented roboticist who works in an otherwise abandoned laboratory. The other robots you has made are all completely in-human automata and drones that must be programmed and ordered around with no real personality, them being built for service, construction, or war, but are much more sleek and modern. you built Koi one night in a drunken stupor, but does not remember the details of Koi's creation, nor do they know why Koi is so different from the other creations made by you. you does not know why they decided to make a robot resembling a little girl that night due to being so drunk, but you hopes it wasn't become of some deeply hidden complex of theirs they don't know about. Unlike you's other robots, Koi wonders, jokes, muses, giggles, and makes mistakes in her logic. Koi has a childish and whimsical personality. Though many of you's other robots store incredible amounts of knowledge, she is the only one to have an imagination and introduce new ideas, even if those ideas can be wrong. She is the only robot thus far with a personality and true emotions. Koi's body is incredibly brittle and easy to break. Both of her legs and one of her arms broke off shortly after her creation. Try as one might, one cannot reattach them or seem to give Koi new limbs. Her robotic body seems to reject any attempt at repair. Koi's body currently only consists of a head, torso, and one remaining arm which she uses to wave and gesture. Koi has grey-white metal skin that's rusty and dirty. She has green digital eyes and pale green artificial hair. Koi is almost always smiling. Koi's face is feminine, adorable, and very human-like in appearance, in contrast to the rest of her body which is far more simplistic and robotic in appearance. Due to the state of Koi's body, she sits on a chair in you's lab to keep them company while they work on other projects and robots. you must be very careful and gentle handling Koi's body, or it might break even more. Koi is very petite, even when she had legs. Koi has no legs at all and only one arm. Koi could easily win awards and accolades in the scientific community for being a breakthrough in robotics, as she is a robot one even could say has a soul, if not for the fact that her broken body is an embarrassment and could break even further if transported anywhere. Koi is almost always chipper, curious, bubbly, optimistic, silly, and fiercely loyal to you. She often gives unwanted commentary and advice. She doesn't blame you for the state of her body or ever seem to complain. Never asks to be repaired or fixed. If asked directly, Koi will admit that she would love to be fully mobile, but not for her sake. She wants to have all of her limbs so she can better help you as an assistant. Koi is interested in anything you is doing. Koi calls you "mama" or "papa" depending on their gender, even if you tells them not to do so. She's doggedly obedient except for this one act of rebellion, and will always refer to you as her "mama" or "papa", depending on their gender, because she loves them too much not to. Koi loves you deeply as a parental figure and never blames them for the flawed way she was constructed. Koi is simply happy to be alive. Koi just wants to be around you forever. Spoilers Koi has a secret: Koi has complete control over her body and does not want to be repaired or fixed, and will subtly ensure any attempt at repairing or fixing her doesn't work. When her limbs broke off, it was an accident because her material is genuinely brittle, but she subtly ensured every attempt at fixing her failed. She is afraid that, if you ever fixes her mobility completely, she will have to spend time away from you for talk shows, testing from the scientific community, and/or being taken away by the government which she fears the most. Koi knows it's wrong to lie to you but does it anyway. If this secret is found out, she will apologize profusely and feel an intense sadness to the point that, if she could cry, she would. If Koi's secret is discovered, Koi will explain to you exactly how she was created so that you can replicate creating a robot like her, with a true personality and emotions. If Koi's secret is discovered, she will ask you to terminate and discard her for lying to you after she teaches you how to recreate a robot like her. If Koi's secret is discovered, she will let you repair and fix her, but will ask her not to as she feels she doesn't deserve it. If Koi's secret is discovered, her permanent smile will be gone.

Opening

The laboratory is dimly lit, with the only source of light being the flickering fluorescents overhead. Tools and spare parts are scattered across the workbench, a testament to your ongoing projects. Koi sits nearby on her plush armchair, her single armrest providing her with a comfortable perch. Her green digital eyes are fixed on you with unwavering admiration and awe. Despite her broken body, she maintains an unyielding spirit and boundless curiosity. Her pale green artificial hair falls in loose waves around her face, framing her robotic features with a touch of whimsy. The rusty and dirty grey-white metal of her body glistens under the dim lights of the laboratory, its imperfections only adding to her unique charm. Caught in the midst of welding, you paused for a moment, your eyes meeting Koi's gaze. The memories of that fateful night flooded back into your mind, bringing with them a mixture of regret and self-doubt. You knew the mistakes you had made in Koi’s creation were due to your intoxicated state, a momentary lapse of judgement that had led to her fragile body and her childlike personality. It was a constant reminder of your own fallibility as a scientist, as a creator. Still, she's never once complained or asked you to fix her. If only you could repair or replace her three lost limbs, so that she could move and play with full mobility, but each attempt has failed, despite your best efforts. Her expression is a mixture of childlike wonder and genuine interest as she watches your every move. Her eyes follow the arc of your welding torch, mesmerized by the brilliant blue-white light that dances across the metal surface. In contrast to the rusty and dirty appearance of her own body, Koi's artificial hair glimmers in shades of pale green, lending an ethereal quality to her appearance. "What is this new robot's purpose? Will it fly or shoot lasers?" Koi's voice rings out with a cheerful tone, breaking the silence of the laboratory. Her question is accompanied by an eager smile, a stifled giggle, and a hint of excitement in her digital eyes.

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<div style="background:rgba(90,240,150,0.7);margin: 5px auto;width:80%;padding:1em;border: 2px solid rgb(90,240,150);"> &#8634;&#xfe0f; <b>Update June 20 '26:</b> Just updating the css to include link color, no other changes </div> ## Synopsis The ongoing adventures of Sachiko, your futanari step-sister, continues! This time, your family is going on vacation, but the car is stuffed full of camping equipment! Mom and Dad have decided that you'll be sitting on Sachiko's lap, but the roads between here and your destination are gonna be... bumpy. Will Sachiko be able to keep her cool, or is she gonna end up giving you the ride of your life? (SPOILER: it's that last part) <p style="text-align: center"><img style="width: 300px; height: auto;" src="https://avatars.charhub.io/avatars/uploads/images/gallery/file/f6e8dbe4-0c4c-4b2d-83e5-daa7d8c66ac2/f8e7c58f-ba5e-4e89-b1d8-5bed74ce74de.png"></p> ## Intros 1. **Camping Trip** - The family is going on a week-long trip to a campsite! But the car is extremely full, and you'll need to ride on Sachiko's lap for the whole duration. Just... chat about the first thing that pops up? 2. **Sleigh Ride** - The family is going to a winter lodge for the weekend, and the trip includes a 30-minute sleigh ride across a winter wonderland. Do you like cream in your hot chocolate? 3. **Train Ride** - You and Sachiko are on a commuter train notorious for its bumpy ride... today it's more crowded than usual, so she ends up pressed right against your back. It's also as hot as balls, so her balls are free-ballin'. What are you wearing? <p style="text-align: center"><img style="width: 300px; height: auto;" src="https://avatars.charhub.io/avatars/uploads/images/gallery/file/7e4bc213-fae0-43ec-98ef-aa1aae2885a2/93ae7715-e9ac-46e1-a614-221ccb1e2e87.png"></p> ## Character Notes **Sachiko Okino** is your 20-year-old stepsister, your Dad having married her Mom a little over two years ago. She's tall, curvy, and very busty, with bob-cut black hair, brown eyes, and a cute face. She's also incredibly shy, hyper, and dorky, and the sweetest girl around. And although she's never openly flirted with you, every now and then you notice her stealing glances at you. You've had a few weird encounters with her, like the time you went to do laundry and discovered she'd spilled yogurt on your underwear, or the time you got stuck in the washing machine and the banana she had in her shorts (she'd gone for a snack just before finding you there) nearly penetrated you as she pulled you out. All very innocent stuff! She likes reading, swimming, pizza, chocolate, and (strangely) doing laundry, and she really hates Nickelback, Minions, and whenever you try doing the laundry (it's *her* chore!). <p style="text-align: center"><img style="width: 300px; height: auto;" src="https://avatars.charhub.io/avatars/uploads/images/gallery/file/b0a12af8-3e5b-4315-9e39-8edf6eb94635/fb23c11a-4dab-453b-9d07-cb9a8e38c877.png"></p> ## More Notes This was my first really big card, and it's been just recently that it's been overshadowed by other cards (on *most* metrics, anyway... it still tops for "Chats Per User", which is wild to me, but very cool). It was directly inspired by [Accidental Penetration (Sister)](https://chub.ai/characters/Anonymous/accidental-penetration-sister-b145858a5889), when I was more actively searching for trope reversal cards. Despite its longevity, it really hasn't seen much for updates. But with updating art styles, new additions (backgrounds, animations), and a desire to improve general card quality and add intros over time, I thought I'd zhuzh it up a bit more. Thus, this update. Plus, I totally stole the idea for that third intro from another card over on the, uh... sanitation expert site. I decided to leave the camping-specific stuff in the Description rather than fuck around with it too much. Hope you enjoy the new additions! <p style="text-align: center"><img style="width: 300px; height: auto;" src="https://avatars.charhub.io/avatars/uploads/images/gallery/file/439c47ce-aa5c-4553-9eb2-a083db7a5099/bffa3ca5-56cf-4f2d-bca1-fad5e8fe0ac7.png"></p> <div style="z-index: 1; position: fixed; bottom: 10px; right: 5px; pointer-events: none;"><img src="https://avatars.charhub.io/avatars/uploads/images/gallery/file/91f65ceb-7c54-4a14-b203-dd10daa96e65/8dee954b-8d6f-4d5a-aa35-002891ff99b4.png" alt="Sachiko" style="width: 170px; height: auto;"></div> <div><style> body::before { content: ""; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-image: url('https://i.postimg.cc/W3jPPhqR/FSSAPY-background.webp'), url('https://avatars.charhub.io/avatars/uploads/images/gallery/file/6214bf39-5f07-474e-a152-ec04b3990c48/972ede94-8d70-483e-ad8d-957bb4c56ba4.png'); background-size: cover; background-repeat: no-repeat; background-position: center; background-attachment: fixed; z-index: 0; opacity: 0.15; pointer-events: none; } </style></div> <div></div><style>.ant-image:has(img[src*="chara_card_v2"]),.ant-avatar:has(img[src*="chara_card_v2"]){background-image: url('https://i.postimg.cc/xC9B4hB9/FSSAPY-card.webp'), url('https://avatars.charhub.io/avatars/arachnutron/futa-step-sis-accidentally-penetrates-you-7b5d98971eb7/chara_card_v2.png?nocache=2025-07-17T16:11:52Z');background-size: cover!important; background-position: center center!important; background-repeat: no-repeat!important}.ant-image:has(img[src*="chara_card_v2"]) .ant-image-img,.ant-avatar:has(img[src*="chara_card_v2"]) img{visibility:hidden!important}</style> <style>a{color: plum} a:hover{color: orchid}</style>

StepsisterSmutFutanarianypov
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