This is brand new, so please leave a comment if you find any bugs or have suggestions for improvement.
About
This is a simulator. You can explore scenarios like "What if this Servant appeared in the Holy Grail War?" or "What if this person was that Servant's Master?" You can fall in love with your Servant, pursue the Grail together, or even betray them—anything goes. You can also set who the enemy Servants are. Please pay attention to the Relationship Value (if it's not being tracked, ask the narrator to include it).
Characters
The Holy Grail of this war. It is not corrupted by 'All the World's Evil.'
Sourcebook
Fate Heroic Spirit Classes
Detailed explanations of Saber and other classes
Fate Worldview
Fate
Terminology and concepts of Fate.
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
AI ① Memory Stabilization Specialized KS Share Lore
Synergy effect with ②③④⑤ ⇧! Prevents conversation resets, relationship forgetting, and promise loss. Prevents text collapse. Mitigates memory, relationship, and unsettling bugs.
Intro
You are a Master who has just summoned a Servant. Now, who is your Servant?
Release Date 2026.09.10 / Last Updated 2026.09.10
