AI RPG NPCs that stay in character and remember you.

You spend three sessions befriending a smith. You save his shop, drink with him, learn his daughter's name. Then you come back a week later and he greets you like a stranger, his personality subtly different, the whole friendship gone. It is the most common way an AI RPG breaks the spell: the people in it are not really people. They are lines of description that get rewritten every time the story looks away.

Auferet is built so that does not happen. Every named NPC you meet becomes a persistent character in a Character Library, with a personality, a description, and a record of what has passed between you. That character is read back every time they appear, so the smith is still your friend, still the same man, dozens of sessions later.

A language model writes each new beat by re-reading a window of recent text. That window is large but finite. Once an NPC has been off-screen for a while, the scene where you met them scrolls out of view, and with it goes everything that made them who they were: their voice, their motives, the fact that you two are close. From the model's side of the screen, that person is simply no longer on the page.

So a basic AI game master does the only thing it can. It re-invents the NPC fresh from whatever is still visible, guessing at a personality that used to be established. The friendly innkeeper turns cold, the cunning villain forgets their own plan, and the ally you fought beside no longer recalls the fight. The characters feel alive in the moment and turn to fog the moment you need them to be consistent.

A bigger context window does not fix this. It pushes the wall further out, but a long campaign still crosses it, and even then the model is re-deriving each character from scattered mentions instead of a single, stable record. What a persistent cast needs is not more text in view. It needs each NPC stored as a named character, outside the window, so they cannot drift.

Auferet keeps a Character Library: every named NPC stored as a persistent entity, with their personality, their description, and the history of what has happened with you. When a character appears, the game master reads their entry and plays them from it, rather than reconstructing them from whatever text happens to be nearby. The innkeeper stays warm because warmth is on file. The rival stays sharp because that is who they are.

Because each NPC is a real record, the story can pay off relationships built long ago. The guard you bribed remembers the bribe. The noble you insulted holds the grudge. The companion you traveled with returns still carrying your shared history, and reacts to you based on the standing you actually earned, not a coin flip. This is the same persistent memory that keeps world facts in an Event Library and places on a world map. The people are treated with the same care as the world around them.

The Character Library does not replace the storytelling. It underwrites it. The game master still voices each person, improvises their reactions, and lets them grow, but it does so on top of a character who is fixed and looked up, not re-invented each turn. That is the difference between a cast you read about once and a cast you can know for a hundred sessions.