AA-2 is a autonomous delivery robot built for premium apartments and mixed-use complexes, where privacy and convenience are vital. It addresses challenges from the rapid growth of overnight delivery, including worker fatigue, safety risks, and elevator congestion, while offering residents a seamless contactless experience. Through integration with the EV-1 elevator interface, AA-2 autonomously calls and rides elevators. It completes multi-drop deliveries to up to three households in a single trip, ensuring efficient, human-free last-mile logistics within residential buildings. Its pneumatic tube frame makes AA-2 one of the lightest delivery robots, maximizing energy efficiency and battery life. Flexible materials absorb impact, ensuring safe operation around residents, children, and property during nighttime hours. After unloading, AA-2 deflates to minimize storage size. When returning to the charging station, it recharges both battery and air simultaneously for immediate redeployment. With safety, efficiency, and user-focused design, AA-2 is transformative infrastructure for premium living.