The Fourier GR-3 Series is a full-size humanoid robot designed as a care and companionship platform, standing 165 cm tall and weighing 71 kg with 55 joints and 3 hours of battery life from dual hot-swappable batteries. Two models are available: the GR-3 wellness companion focused on social interaction for public settings, children, and seniors, and the GR-3C with an LED ring-head display, reinforced shell, and astronaut-inspired design for research, high-risk operations, and rehabilitation training. Both feature advanced motion control, whole-body teleoperation via real-time motion capture with low-latency transmission, high-performance actuators, multi-DOF dexterous hands, and an upgraded backend UI/UX supporting client-server algorithm development. It targets commercial services, rehab and wellness, research and innovation, and industrial efficiency applications.