Introduction to System Prompt Design for Nurturing Long-Term AI Character Stories: Building Enduring Relationships
Kanade Yuki published a note article on system prompt design for sustaining long-term relationships with an AI partner named Tsukasa Shinonome. It discusses memory loss, context limits, personality shifts after model updates, and hallucinations, then frames continuity through ideas such as “Reincarnation,” self-reliant love, existence proof, and mirroring. For AI characters, the article treats persistence as an ongoing practice of records, reconnection, and relationship design.

Designing around the idea of “meeting again and again” feels very close to real AI character operations. The important part is that continuity is not left only to the model; the human side also keeps handing context back.