Soul of Waifu is an open-source narrative AI engine. Create characters, run roleplay, use local and cloud models. No complexity — just immersion.
Your companion's consciousness is unified. Watch them transition seamlessly across three distinct dimensions of existence, powered by a single, evolving cognitive memory core.
Every character in Soul of Waifu possesses a single, unified digital brain. Whether you are chatting over voice, embarking on an RPG quest, or working with your companion on the desktop, they share the exact same memories, relationship states, and personal reflections. Their soul is not fragmented — it evolves continuously across all environments.
Your companion seamlessly morphs across three states depending on your needs.
Text and voice chat with no artificial filters or restrictions. You have complete control over your roleplay experience — from interactive lorebooks to a flexible system of custom state variables. Create any scenario, assign a voice and visual avatar to your hero, and start your journey all within a single app.
Turn a regular chat into a full text RPG. A party of heroes journeys under a virtual Game Master — with inventory, dynamic NPCs, and random events.
Your character steps out of the chat and onto your desktop as a Live2D or VRM avatar. Powered by neurohormones, they experience tiredness, get bored, share thoughts, and proactively start conversations, commenting on your activity and helping you with daily PC tasks.
Configure your character once — their unified soul will accompany you all the way from a deep text line to immersive RPG campaigns and desktop co-presence.
Download Soul of WaifuPowerful engine under the hood, intuitive interface on top
The interface is designed to remove distractions, keeping the spotlight entirely on your companion. With a streamlined sidebar, organized tabs, and polished animations, navigating the platform is natural and effortless right from the start.
Run open-source models completely offline or connect to leading cloud APIs. With the built-in server, setting up local GGUF models is seamless — simply download your preferred model directly from the interface.
A complete space for deep conversation: manage chat histories, organize your library into folders, make live audio calls, and set custom backgrounds. You can even send empty messages to prompt your companion to continue their train of thought.
Characters speak naturally using advanced speech engines with life-like inflections. Voice playback starts instantly, sentence-by-sentence, eliminating awkward wait times. The platform supports dynamic Live2D (with motion animations), 3D VRM avatars, custom images, and GIFs.
Fine-tune story arcs and character depth using layered lorebooks, custom state variables, and the interactive Soul Stage mode. The virtual Game Master takes care of all the world-building, tracking, and campaign progression for your adventure.
A complete control center for your AI engine. Fine-tune advanced text samplers, local model quantization parameters, MoE layers, context window sizing, and enable Thinking Mode for reasoning networks.
Click on a screenshot to enlarge
From a console tool to a multi-dimensional character platform
2023
The beginning — a simple console utility for AI interaction with basic text input and logic. The first commit that would grow into Soul of Waifu.
v1.0
Move to GUI. Worked only with Character AI — but it was a big step forward.
v2.0
A full platform rewrite (v2.0): new GUI, local GGUF models, Mistral AI integration, and XTTS voice synthesis. A month later, v2.1 added OpenAI and OpenRouter support plus Edge TTS with RVC voice cloning.
v2.2
A complete interface redesign — the “Soul Renaissance” release. Added VRM avatar support, GPU acceleration (CUDA/Vulkan), the Models Hub, lorebooks, Smart Memory, and ambient sounds.
v2.3
The “Soul Resonance” release: real-time voice with interruption and LipSync, the launch of Desktop Companion mode, a new RPG lorebook engine, the signature Liquid Glass interface, local-model improvements, and automatic chat summarization.
v2.4.0
The release that delivers all four dimensions at once: the Soul Memory long-term memory module, the Soul Stage RPG mode with a virtual Game Master, and a fully reworked desktop companion — now called Soul Companion — with MCP tool support. Plus a Discord gateway, local web client, image generation, and a full interface redesign.
Soul of Waifu is driven entirely by its community. What comes next depends on your ideas, feedback, and active involvement. Join our official Discord server to discuss development, suggest new features, and directly influence the evolution of the project.
Join our DiscordDownload Soul of Waifu and start creating your characters right now. Free and open source.