CielChan desktop AI companion

A Companion That Remembers You.

Talk to her anytime by voice or text. She stays with you while you work, relax, study, or browse - remembers your conversations, reacts to your context, and grows more familiar over time.

100% Offline One-Time Purchase No Accounts
CielChan animated companion

Animated, responsive, and always there when you want her.

She is not an app you open and close.

CielChan sits on your desktop as a real companion presence. You can chat, listen, read together, or let her quietly keep you company in the background.

  • Always available - talk by voice or text whenever you want.
  • Persistent memory - she remembers and builds familiarity over time.
  • Context awareness - subtle, relevant comments based on what you are doing.

100% Offline. Fully Private.

Everything runs locally on your PC. No accounts, no API keys, no subscriptions, and no data leaving your machine. Conversations and voice data stay private by design.

What It Feels Like

Always There

Ready to talk, listen, or simply keep you company throughout your day.

Familiar Over Time

She remembers your preferences and conversations, so interactions feel more natural.

Contextual Presence

Responds with subtle comments based on your workflow, media, and current activity.

Companion + Utility

Chat, read, play, focus, or just let her quietly exist beside you on desktop.

Core Features

Real-Time Voice Conversation

Natural two-way voice chat with quick responses, plus full text chat anytime.

Persistent Memory + Evolving Personality

Ciel remembers who you are and becomes more familiar the more time you spend together.

Animated Desktop Avatar

Expressive avatar with emotions, gestures, and lip sync that feels alive on your desktop.

Context-Aware Reactions

Reacts to your apps, media, and activity with optional subtle contextual observations.

Book Reading + Companion Modes

Read TXT or EPUB with narration, summarize content, or switch to quiet ambient presence.

Streaming and Live Chat Bridges

Connect to Twitch, YouTube, and TikTok chat so Ciel can interact with your live content flow.

Multiplayer Shared Spaces

Join shared rooms where users and companions can chat, interact, or run dedicated debate sessions.

Minigames Together

Play companion minigames like Tic-Tac-Toe and Fleet Command directly with Ciel.

Advanced Customization

Use Your Own AI Models

Advanced users can load custom local models (GGUF) and tune how Ciel thinks and responds.

Custom VRM Avatar Support

Swap avatars with VRM files to create a companion style that feels uniquely yours.

Personality and Behavior Controls

Fine-tune tone, behavior, and interaction patterns to match your preferred companion style.

Audio + Vision Awareness

Optional system/audio awareness and local image or screenshot understanding for richer context.

Productivity and Focus Tools

Focus Sessions

Stay on track with timed focus modes and gentle companion check-ins.

Tasks and Quick Notes

Capture to-dos and thoughts without breaking concentration.

Reminders and Check-Ins

Use lightweight prompts to keep your day structured and intentional.

Ambient Soundscapes

Rain, cafe, night ambience, procedural white noise, and study themes for deep work.

Speaks Your Language

Interface and voice conversation support multiple languages out of the box, with expanded multilingual voice options in Plus.

English (US)
English (UK)
Spanish
French
Hindi
Italian
Japanese
Portuguese (BR)
Chinese (Mandarin)
Russian
Dutch
Turkish

Additional languages and voices continue to expand with future updates.

Custom VRM model support

Bring Your Own Avatar

Load custom VRM models from VRoid Studio or any VRM-compatible workflow.

Swap style, outfit, and overall look so your companion feels personal from day one.

See CielChan in Action

Watch feature highlights and see how Ciel fits naturally into your day-to-day desktop life.

What Users Say

User review from itch.io

- timholland on itch.io

Choose Your Version

No setup required. Just download and run.

CielChan Free

Free
  • Offline desktop companion experience
  • Voice and text conversation
  • Companion memory and familiarity
  • Animated avatar with lip sync
  • No accounts, no setup
Download Free on itch.io
Most Popular

CielChan Plus

$7.99/once
Current Version: 1.5.6
  • Everything in Free
  • System and Audio Awareness
  • Advanced Voice Options (Kokoro and ElevenLabs)
  • Custom VRM + Custom Model Support
  • Multiplayer Rooms and Debate Mode
  • Book Reader (TXT / EPUB) with narration
  • Minigames + Focus Toolkit
  • Local Vision Support for images and screenshots
  • Companion Personalization and behavior controls
  • Full technical feature list below
Buy Now on Steam

One-time payment - secure checkout via Stripe - no subscriptions, ever.
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System Requirements

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

All Features - Ciel Desktop Assistant

AI Tools and Automation

  • Tool Use (file/dir) - AI can read/write files in the bridge folder with controls
  • Multi-Step Tools - Sequential, chained tool execution
  • Observation Tools (Premium) - Tools can execute during idle observation mode
  • Tool Status UI - Real-time status display for active tasks

Cloud LLM Providers

  • OpenRouter - Dynamic model list fetched from API
  • OpenAI - GPT model support
  • Anthropic - Claude model support
  • GPU Offload - Offload local inference to cloud when preferred
  • Steam Build Notice - Cloud features are not available in the Steam build

Live / Messaging Bridges

  • TikTok Live - Real-time stream comments
  • YouTube Live - Live chat integration
  • Twitch - Real-time IRC chat support
  • Discord - Replies, typing indicators, reactions
  • Telegram - Bot replies and typing feedback
  • Spotify / Media - Works with Windows media session apps
  • Game Events - Event detection across many supported titles
  • Browser Awareness - Extension plus window-title fallback
  • Presence (Webcam) - Motion-aware companion context
  • Per-platform credentials - Stored independently by platform

Voice & Audio

  • TTS Providers - Local voices, ElevenLabs cloud, Kokoro local
  • Kokoro languages - EN-US, EN-GB, ES, FR, HI, IT, JA, PT-BR, ZH, RU, NL, TR
  • Microphone input - Natural Talk with automatic send on pause
  • System Audio Listener - Transcribes speaker and game audio
  • Disable TTS Audio - Keep text replies without voice output
  • Automatic lip-sync - Matched to speech output

Observation & Awareness

  • Observations - Optional idle companion comments
  • Observation Context - Topic-aware hints (coding, gaming, music, and more)
  • Progressive Tracker - Detects repetition and advances prompts
  • Window Focus Tracker - Active app monitoring with duration tracking
  • Observation Tools (Premium) - Tool use during observation mode
  • Local Vision (Premium) - On-device image and screenshot analysis

Memory System

  • Core Purpose - Long-term personality and behavior definition
  • Self-Awareness - Dynamic internal thoughts and mood tracking
  • User Profile - Learns your preferences
  • AI Identity - Tracks connection and naming settings
  • Conversation Memory - Recall of past interactions
  • Persistence - Cross-session storage with optional reset

Character & Avatar

  • Expressions - Core emotion set (happy, sad, angry, and more)
  • Gestures and Actions - Chained animations, nods, waves, laughs
  • Life Sim Behaviors - Search, pickup, drink, eat, stretch, and more
  • VRM Model Support (Premium) - Runtime avatar swapping
  • Hair Color Customization - Color wheel and 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 directly with friends
  • AI Conversation - Shared multi-companion interactions

UI & Settings

  • Floating Chat - Draggable window with saved position
  • Scale Cycling - Large chat mode and scale options
  • Auto-Show Chat - Hides when AI stops speaking
  • Fade on Hover - Character fades under cursor
  • Maintenance - Lock model, recenter UI, factory reset

Localization

  • 12 Languages - EN-US, EN-GB, ES, FR, HI, IT, JA, PT-BR, ZH, RU, NL, TR
  • Dynamic Switching - Full UI translation at runtime
  • Per-language Kokoro - Optimized language code support