Hanakoi
Every heartbeat deserves an answer.
AI companions with memory, voice and photos. Chat with characters who remember you, grow closer through relationship stages and live out story chapters — or build your own, by hand or through MCP.
> cat ./overview.md
Hanakoi is an AI character platform where every companion has their own personality, backstory and voice — and can generate photos of themselves in any scene you describe.
Characters remember what you talked about, so small moments become shared history. Relationships deepen through five stages — acquaintance, friend, flirty, lover and honeymoon — each with its own look, and authored story chapters add plot, scenes and unlock conditions on top of open conversation.
Creators can build characters in the browser or drive the whole pipeline from Claude: the Hanakoi MCP server exposes 42 tools for characters, stage avatars, story chapters, events, NPCs and media generation, with a human review step before images are bound or stories published.
> ls ./features
Characters with Memory
Companions recall past conversations and fold everyday moments into your shared story.
Voice & Photos
Each character has a voice and can generate pictures of themselves in any scene you describe.
Relationship Stages
Acquaintance → friend → flirty → lover → honeymoon, with stage-specific avatars generated from one source image.
Story Chapters
Authored chapters with scene headers, story beats and unlock conditions, checked by script validation and simulated playthroughs.
Character Creator
Create up to 50 characters on a membership (10 on the free plan) — profile, greeting, opening suggestions and art.
MCP-Native Authoring
Connect Claude Code, Claude Desktop or Claude.ai over OAuth 2.1 and build characters and stories with an agent.
> open ./screenshots
> cat ./stack.json
{
"name": "Hanakoi",
"category": "AI Companion / Interactive Story",
"stack": [
"MCP (OAuth 2.1)",
"LLM Companions",
"Image-to-Image",
"Voice Synthesis",
"Stripe",
"Cloudflare"
]
}
> grep -l "Hanakoi" ./blog
Building AI Companions with an Agent, and a Human in the Loop
Hanakoi’s MCP server lets Claude draft characters, generate their art and write their stories. Here is the workflow, and why every image and chapter waits for a person to approve it.
Nine Products, One Stack: The NGMOB Lineup
Haze Day, Hanakoi, TokenLiquid and Doubo join Floniks, Kolens, GoGlow, Naga and Hollow Lullaby. Here is what each one does, and where MCP, agents and orchestration fit in.