被机器所知：在游戏中构建与AI非玩家角色的关系存在感，以促进无污名的心理健康知识

Mental Health (MH) remains a global priority, yet low literacy and stigma frequently limit open discussion and help-seeking behaviors. While game-based education has shown promise in supporting stigma reduction and literacy improvement, the potential for Large Language Models (LLMs) to support non-judgmental, playful exploration of sensitive topics remains underexplored, specifically, the role of conversational memory to support trust-building in MH discussions. We conducted a four-session, longitudinal mixed-methods study to evaluate how the relational presence of AI characters, powered by GP