As an experienced game developer with over 3 years of experience, I possess the right skills and expertise to bring your virtual pet, "Brain," to life. My proficiency in Java, C#, Python, and Artificial Intelligence can be effectively leveraged to simulate the wide range of emotions that this project requires. Having worked on projects with intricate functionalities like time-tracking and complex life simulation, I assure you my commitment to meet deadlines for Brain's lifespan.
Most importantly, my prior experience in game design aligns perfectly with your requirements. Creating a game involves understanding human psychology deeply. My knowledge in that area combined with my technical capability can offer you a truly unique virtual pet experience. Additionally, being well-versed with AI also means that I understand the complexities of creating a long-lasting virtual companion.