Local, uncensored AI roleplay — with story-consistent image generation.
The same character. The right scene. Panel after panel.
One character, four framings, same face — the hard part of AI roleplay, solved. An open-world, uncensored RPG with unbound AI narration and a storybook that keeps every panel. Runs on your card. No subscription. No ID upload.
Bring your whole roster. Fervyn imports your TavernCard V2/V3 and chub.ai cards — a PNG, a JSON, or a chub.ai / JanitorAI / HuggingFace link — carrying the name, persona, scenario, greeting, example messages, system prompt, tags, and your lorebook (up to 100 entries). The card's own portrait — when it's a PNG — becomes its avatar; every new scene renders from a fresh, consistent face of its own — one you can re-roll or pin. No ID upload. No face scan. Unlike where you came from.
Persistent character faces
A storybook you keep
Verifiable privacy
Free · Windows · NVIDIA 8 GB minimum — your card picks its config automatically · installer ~165 MB, then a one-time ~28 GB model download at the 8 GB floor, more on bigger cards (resumes if interrupted) · nothing else to install · unsigned — how to verify → · SHA-256
Don't take our word for it. Look at the panels.
Most AI roleplay apps bolt an image generator onto a chat box. Fervyn was built the other way around — so the same character looks like the same character from the first panel to the last, scene after scene.
Same character. Panel 1 and panel 4. Same face.
The render matches what the story just said.
A scene extractor reads the prose and renders what was actually written — where the bodies are, what the framing is, who's in the room. The picture follows the story, not a static prompt.
"The archery grounds lie fallow in winter — the target-butts wrapped in canvas, the bow-rack dusty, frost forming on the stone steps leading down to the practice area."
"By nightfall, the Upper Lake has been transformed — a thousand floating lanterns drift on its surface… The high balcony overlooks all of it."
"Lihua crawls across the lacquered floor with the robe slung low over one shoulder, eyes front…"
Each render above carries the burned-in AI-generated badge the pipeline applies to every image it makes.
Uncensored by design.
Fervyn is an open-world harem RPG with unbound, AI-driven narration — it ships uncensored image and language models because adult roleplay is the point, not a bolt-on. No filter walls, no "content policy" refusals, no railroaded story. The engine runs on your machine, so the only rules are yours — and you own every panel it makes.
18+. One hard line, non-negotiable: Fervyn permanently blocks any sexual content involving minors — on both the prompt and the generated image — and that filter cannot be turned off. Everything else is yours to direct.
Your models. Your settings. Your machine.
Fervyn is an open engine, not a black box. It runs the local tools you already have, and lets you swap in your own.
Chat: auto-detects KoboldCPP, Ollama, or LM Studio running on your machine — or bring your own GGUF and drop it into any of them; Fervyn picks up whatever you have installed. Full sampler control (temperature, top-p, top-k, repetition penalty, min-p) and an editable context length live under Settings. The uncensored chat path makes zero outbound calls.
The shipped chat model scales to your card — TheDrummer's Rocinante-X 12B on 8-to-16 GB cards (IQ3 quant at 8 GB, Q4 above) and Cydonia-24B from 24 GB up (co-resident with the image model at 32 GB), plus Skyfall-31B as an optional max-quality pick on 32 GB. Older GTX-class cards fall back to a 3B. Every one is swappable — see writing quality by GPU tier.
Image:ComfyUI with SDXL under the hood. Drop your own checkpoints and LoRAs into the standard ComfyUI model folders (Civitai is a first-class source), or open and edit the workflow — it's a plain JSON file on your disk.
Consistent faces: character identity is held by an IP-Adapter face conditioner on a fully permissive licence — Apache-2.0 weights, an MIT image encoder, and no biometric face-scan at render. That's the honest engineering reason the same face holds panel after panel.
Every scene becomes a panel you keep.
Your story accumulates into a picture-book that lives on your disk. There's no platform that can delete it — and you can export the whole thing: the prose, every image, and a verifiable provenance sidecar on each panel.
Exports as a portable bundle — the prose plus every image, each carrying a per-panel C2PA Content Credential (a tamper-evident provenance signature, on an open industry standard).
Every image is signed the moment it's generated — open one in any Content Credentials verifier. The signature is written and checked entirely on your machine: it records that the panel was made in Fervyn, and never phones home.
Each frame is a single woman, kept consistent across her world's setting and framing. The hard part — the same face, panel after panel — is the part that's solved.
The Inner Palace 內廷Topkapi — The Felicity WithinCrowns and CoronetsThe Convivium of CaesarThe Brothel of Seven ColoursYoshiwara — Floating World
…and there's a whole cast of worlds to explore — imperial China, an Ottoman seraglio, a European court, late-Republic Rome, a modern luxury house, Edo's floating world. Period-correct, each rendered to match.
Verify us. Don't trust us.
The uncensored chat path makes zero outbound network calls — and a continuous-integration (CI) test fails the build if any code path tries to phone home. Fair question for any adult installer from a small project — so here's what you can check today.
Scope, plainly: the zero-outbound guarantee covers the uncensored chat path. Optional, clearly-labelled features that are off by default may use the network — never on this path.
Honest signing note: the picture-book panels are C2PA-signed and the installer ships with a published hash you can verify. We don't claim the installer itself is code-signed — verify it by the published SHA-256 instead. Because it isn't code-signed, Windows SmartScreen will likely show an "unknown publisher" warning — that's what unsigned looks like, not a malware verdict. Verify the SHA-256 first (or upload the file to VirusTotal, which runs 70+ scanners), then choose More info → Run anyway.
Built in the open. Shaped by you.
Fervyn is built by one person, in public — and steered by the people who actually run it. Tell us what to build next, get help installing, and report what broke — the anonymous feedback form takes all three, no account needed.
#showcase — what people are generating (work-safe + adult rooms).
#help — install + GPU questions, answered fast.
#feature-requests — vote on what ships next.
#bug-reports — tell us what broke; we read every one (include your GPU + the installer build).
No account? A couple of ways in without one: the anonymous feedback form (no sign-in, your IP is never stored), or the public roadmap — Now / Next / Later.
Runs on your card. Scales with it.
Fervyn detects your VRAM — the memory on your graphics card — and picks an image workflow for your hardware automatically. The Lite tier is built to run on an 8 GB card.
The Lite installer is a free download. There's nothing to buy to use what you install.
Does it run locally or in the cloud?
On your machine. First launch downloads the models for your hardware — ~28 GB for the 8 GB config, ~32 GB at 12–16 GB, ~38 GB at 24 GB and up (runtime stack + models) — and the download resumes if your connection drops. After that, the game runs locally. Budget ~34 GB free at 8 GB, ~38 GB at 12–16 GB, ~45 GB at 24 GB+. Full flow: installation guide.
How do updates work?
New builds are announced on the changelog (RSS available). Updating means running the new installer — your characters, chats, and picture-books live in your user data folder and survive reinstall. Nothing updates itself behind your back.
Do I need an account or to upload ID?
No account, and no ID upload, to use what you install.
Can I import my existing characters?
Yes. Drop in a TavernCard V2/V3 or chub.ai card — as a PNG, a JSON, or a chub.ai / JanitorAI / HuggingFace link. Fervyn carries the name, persona, scenario, greeting, example messages, system prompt, and tags, plus your lorebook (up to 100 entries). A PNG card's own portrait becomes its avatar; every new scene renders from a fresh, consistent synthetic face you can re-roll or pin. Alternate greetings, author's-note / post-history instructions, and custom card extensions are not imported.
Can I tune it for speed or quality?
Above the 8 GB floor, Settings lets you pick a Speed preset (chat + image models stay loaded together, no wait between a reply and its picture) or a Quality preset (a larger chat model + a higher-fidelity image engine, swapped in as needed). A 32 GB card can run both at full quality at once.
Can I keep and move my creations?
Yes. Export any saved chat as a portable bundle — prose, images, and a C2PA provenance signature on each panel, written and verified locally. Nothing phones home.
Is the source open?
The repository is open so the privacy guarantee is auditable. Image models and some assets are distributed separately.
Is it available everywhere?
Not yet everywhere — some regions are excluded at download while legal review completes. We don't publish a compliance claim for any specific jurisdiction. 18+ only.
