Show HN: CharacterTest.app – AI character matching based on Big Five models

Hi HN,

I’m the creator of CharacterTest.app. I’ve always felt that traditional "Which character are you" quizzes were too static—relying on rigid branching logic that often yields predictable results.

To solve this, I built an engine that uses Immersive AI to perform semantic personality mapping. We integrate established psychological frameworks like the Big Five (OCEAN) and MBTI to create a more nuanced matching system. Instead of simple keyword matching, our LLM-based engine analyzes user inputs against a high-dimensional trait database covering 100+ fictional universes.

Key Features:

Scientifically-Grounded AI Matching: Leverages semantic analysis to decode user personalities into MBTI and Big Five dimensions before matching with character profiles.

100+ Fictional Universes: Extensive library covering TV shows, movies, and anime (from Stranger Things to The Dark Knight).

Frictionless & Private: No signup is required for basic tests. We believe in providing value before asking for data.

Global Fandom Support: Fully localized for English, Korean, and Japanese.

Technical Stack:

Framework: Built with Next.js (SSR) for optimal SEO and performance.

Core Logic: Custom prompting architecture to prevent "personality bleed" and ensure consistency across diverse fictional contexts.

I’d love to get the community's feedback on the accuracy of our trait-to-character mapping and the overall UX.

Thanks for checking it out!