Two people upload chats on the same day. One says "that's exactly how she talks". The other says "it sounds like a chatbot". The difference is almost always the file, not the AI. Pick the right chat Use a one-to-one chat, not a group. In a group, the person you want is a small fraction of the text and everyone else's writing is noise. Use the longest chat you have with them. Length beats recency. A three-year conversation with 8,000 messages will always beat a clean 300-message one from last month. Use the chat where you talked normally. Logistics-only threads ("on my way", "5 min") produce a persona that can only do logistics. Export without media Photos and media export as placeholder lines. They add nothing and make the file heavy. Always choose "Without Media". Pick the right name After upload, Neverfar lists every participant in the file. Choose the person you want to talk to, not yourself. If the same person appears twice — once as a saved name, once as a phone number — use whichever has more messages. Give it a real description The description is a short note about who they are to you: "my grandmother, we spoke daily in Arabic and English, she calls me habibi". That single line does a lot of work in shaping the tone. Expect drift on new topics Ask about something never discussed in the chat and the reply comes from general knowledge, not from them. It will sound less like them. That is the honest limit of the method — it can only be as specific as the material you gave it. Small things that help Write to them the way you actually did. Formal messages get formal replies. Don't test it with trick questions. "Who are you really?" gets you a bad answer and tells you nothing. Start with something ordinary. "What are you doing" produces a more recognisable reply than anything profound. If it still sounds off Check that you picked the right participant, that the file covers the years you remember, and that you used a one-to-one chat. In nine cases out of ten it is one of those three.

Getting a persona to actually write like them