CielChan — Anime Desktop AI Companion

A Companion That
Lives on Your Screen.

CielChan is an intelligent anime desktop AI companion that lives on your screen as a transparent overlay. Fully offline, completely private, and yours forever.

CielChan animated — see her in action

See her in action — animated, responsive, and always present.

The digital world can feel a little empty.

Whether you're working late, gaming alone, or browsing through another quiet evening, Ciel is there. She stays quietly nearby, always ready when you feel like talking.

  • No accounts — No signups or logins, ever.
  • No internet required — Runs 100% locally on your machine.
  • No setup needed — Just launch and start talking.

Local & Private by Design

Conversations, voice data, and AI activity stay entirely on your computer. Nothing is ever sent to external servers. Your privacy isn't a setting — it's built into how CielChan works.

Why CielChan?

Lifelike Animated Avatar

Subtle breathing, idle motion, dynamic hair physics, and cursor-tracking head movement make Ciel feel genuinely present on your screen.

A Companion That Remembers

Ciel recalls past conversations and builds familiarity over time. Interactions feel natural and personal the more you talk with her.

Seamlessly Unobtrusive

Smart click-through technology keeps her out of your workflow until you want to interact. Drag, resize, and position her anywhere.

Observation & Narration

Optionally enable screen observation and let Ciel comment on what you're doing — she can narrate your work, continue a story, or simply offer calm company. Runs automatically in the background when enabled, or stays quiet until you speak.

Desktop Assistant Tools

Ciel can do more than talk. Set reminders, fetch information from the web, read and write text files, and assist with lightweight tasks — a quiet helper that does things as well as listens.

Plug-and-Play Simplicity

No accounts, no API keys, no configuration. Install the app, launch it, and Ciel is ready to talk immediately.

100% Local. Yours Forever.

No subscriptions, no server outages, no internet required. Install once and Ciel will always be on your desktop.

Experimental Multiplayer

Connect with other users, chat in shared rooms, or watch your assistants interact with each other automatically in a shared space.

Speaks Your Language

CielChan's interface and voice conversation support multiple languages out of the box, with expanded multilingual capabilities in the Plus version.

🇺🇸 American English
🇬🇧 British English
🇪🇸 Spanish
🇫🇷 French
🇮🇳 Hindi
🇮🇹 Italian
🇯🇵 Japanese
🇧🇷 Brazilian Portuguese
🇨🇳 Mandarin Chinese

Additional languages and voices continue to expand with future updates.

Custom VRM Model Support

Custom VRM Model Support

Take customization further with CielChan Plus. Load and use your own custom VRM models created in VRoidStudio or any VRM-compatible tool.

Change your companion's appearance, outfits, and style to truly make her your own.

See CielChan in Action

Watch the official trailer and feature highlights to see what life with Ciel looks like.

What Users Say

User review from itch.io

— timholland on itch.io

Choose Your Version

CielChan Free

Free
  • Full Offline AI Companion
  • Built-in Voice Conversation
  • Conversation Memory
  • Animated Avatar with Physics
  • No Accounts or Setup Required
Download Free on itch.io
Most Popular

CielChan Plus

$7.99/once
Current Version: 1.3.7
  • Everything in Free
  • System Audio Awareness
  • Advanced Voice (Kokoro & ElevenLabs)
  • Custom VRM Model Support
  • Multi-Language Conversations
  • Assistant Personality Customization
  • Desktop Assistant Tools
  • Book & Document Reader — Voice narration for your files
  • Custom AI Model Loading
  • Full feature list below

🔒 One-time payment · Secure checkout via Stripe · No subscriptions, ever.
Already purchased? Recover your download link.

System Requirements

OS Windows 10 or Windows 11
Memory 4 GB RAM minimum
8–16 GB recommended
Storage 2.5 GB available space
Graphics Integrated graphics supported

All Features — Ciel Desktop Assistant

AI Tools (Function Calling)

  • Tool Use (file/dir) — AI can read/write files in the bridge folder; controlled by safe file manager
  • Multi-Step Tools — Sequential chained tool execution
  • Observation Tools (Premium) — Tools execute during idle observation mode
  • Tool Status UI — Real-time ⚡/✅ status display with gold/green color feedback

Cloud LLM Providers

  • OpenRouter — Dynamic model list fetched from API; API key optional
  • OpenAI — GPT-4o, GPT-4o Mini, GPT-4.1, GPT-4.1 Mini, GPT-4.1 Nano, o3-mini
  • Anthropic — Claude Sonnet 4, Claude Opus 4, Claude Haiku 4
  • GPU Offload — Offload local inference to cloud
  • Reasoning model detection — Automatic handling for models with reasoning tokens
  • Full SSE streaming support — Across all providers

Live / Messaging Bridges

  • TikTok Live — Real-time live stream comments
  • YouTube Live — Polls live chat via Data API v3
  • Twitch — IRC real-time chat, anonymous supported
  • Discord — Replies, typing indicator, reactions; optional channel filter
  • Telegram — Long-poll bot, replies, typing indicator, 👍 reactions
  • Spotify / Media — Windows Media Session; works with any media app
  • Game Events — 100+ games via process detection, log watching, Discord rich presence
  • Browser — Chrome extension (auto-generated) + window title fallback
  • Presence (Webcam) — Motion detection via frame differencing
  • Per-platform credential memory — Each platform independently stores its token

Voice & Audio

  • TTS Providers — Local voices (Amy/Lessac/LibriTTS), ElevenLabs Cloud, Kokoro Local
  • Kokoro languages — EN-US, EN-GB, ES, FR, HI, IT, JA, PT-BR, ZH
  • Microphone input — With Natural Talk (auto-send after silence)
  • System Audio Listener — Transcribes speakers/game audio
  • Disable TTS Audio — Mutes voice while keeping text output
  • Automatic lip-sync — To TTS output

Observation & Awareness

  • Observations (idle speak) — AI comments unprompted during idle
  • Observation Context — Topic hints (Coding, Gaming, Music, etc.)
  • Progressive Observation Tracker — Detects repetition, builds progression prompts
  • Window Focus Tracker — Monitors active app/window with duration tracking
  • Observation Tools (Premium) — Tools usable during observation mode

Memory System

  • Core Purpose — Long-term personality definition
  • Self-Awareness — Dynamic internal thoughts and mood tracking
  • User Profile — Learns and remembers your preferences
  • AI Identity — Tracks personal connection and name settings
  • Conversation Memory — Seamless recall of past interactions
  • Persistence — Cross-session persistence with optional reset capability

Character & Avatar

  • Expressions — 7 core emotions (Happy, Sad, Angry, etc.)
  • Gestures & Actions — Chained animations, nods, waves, laughs, etc.
  • Life Sim — Search, pickup, drink, eat, stretches, exhausted
  • VRM Model Support (Premium) — Load custom .vrm avatars, runtime swapping
  • Hair color customization — Color wheel + HEX input

Book Reader (Premium)

  • Formats — Supports .txt and EPUB
  • Modes — Read, Summarize, Key Points, Custom, Write
  • Navigation — Chapter detection and navigation
  • Integrated TTS — Narration with pause/resume/stop

Multiplayer

  • P2P Core — Direct peer-to-peer connection
  • Rooms — Create, find, and join shared spaces
  • Multiplayer Chat — Chat securely with friends
  • AI Conversation — Experience shared AI interactions

UI & Settings

  • Floating Chat — Draggable window with position persistence
  • Scale Cycling — Large Chat mode + scale cycling
  • Auto-Show Chat — Hides when AI stops speaking
  • Fade on hover — Character fades when cursor over model
  • Maintenance — Lock model, Recenter UI, Factory reset

Localization

  • 9 languages — EN-US, EN-GB, ES, FR, HI, IT, JA, PT-BR, ZH
  • Dynamic switching — Full UI translation at runtime
  • Per-language Kokoro — Succinctly optimized language codes