I wanted a proper waifu chat UI for Gemini. So I built one.

Enhancing the Gemini Experience: A Custom Waifu Chat Interface for More Immersive Interactions

In the rapidly evolving landscape of AI-powered conversational agents, personalization and engaging interfaces are key to creating meaningful interactions. As an avid supporter of the Gemini ecosystem, I recognized a gap in the availability of diverse, user-friendly front-end interfaces designed specifically for character-based persona chats. Inspired by innovative projects like Ani for Groq, I envisioned bringing a similar “waifu” style experience into the Gemini environment.

Driven by this idea, I embarked on developing a dedicated desktop application that transforms the way users interact with Gemini’s AI models—making conversations more immersive, personalized, and visually engaging. This new interface acts as a virtual desktop companion, complete with expressive characters that respond dynamically to user interactions.

Powered by Gemini’s API

The application leverages the Gemini 2.5 API, ensuring robust and seamless communication with the AI backend. Future updates will incorporate newer models, such as Gemini 3.0, to continually enhance performance and capabilities.

Key Features for a Personalized AI Companion

1. Editable System Prompts:
   A built-in Persona Editor allows users to craft and modify the core instructions that define the character’s personality and behavior. This feature enables customization on the fly, tailoring the AI’s responses to match specific tones or themes.

2. Curated Conversation Memory:
   The Conversation Log Editor offers granular control over the AI’s memory. Users can manually edit, add, or delete segments of chat history, effectively guiding the AI’s future responses to maintain consistency or explore new personas.

3. Interactive and Expressive UI:
   Beyond text, the interface displays real-time expressions that change according to the flow of conversation. This visual responsiveness breathes life into the character, making interactions feel more natural and emotionally resonant.

Diverse Characters and Customization Options

The application includes three distinct characters, each available in nine different outfits, allowing users to personalize their virtual companion’s appearance and personality to suit their preferences.

My Motivation and Invitation for Feedback

This project was born out of a personal desire for a more engaging and customizable Gemini interaction experience. I believe that such tools can significantly enhance user engagement and open new avenues for AI companionship.

I invite fellow Gemini enthusiasts and developers to explore this interface and share their thoughts. You can see the application in action and download it from my [itch.io page](https://yakshawan.itch.io/haruna-on