Mimir is an AI tool that allows users to choose a ChatGPT-powered mentor from a list of AI personalities and seek personal advice and lessons. It aims to address the challenge of finding a mentor by providing an accessible alternative. Instead of relying on busy individuals or expensive platforms, users can select an AI mentor and engage in conversations to receive relevant guidance. The AI mentor will ask questions based on previous queries, enabling the provision of increasingly informed advice. Mimir offers a solution for those seeking guidance without the need for extensive resources or extensive networking.