ET1 is the world's first autonomous, learning-capable agentic humanoid robot. While most bipedal humanoid robots today are built primarily to perform pre-choreographed dances and demonstration routines, ET1 is powered by AstraBrain, Galbot's self-developed physical-world agent system, giving it the ability to perceive its environment, understand human instructions, and dynamically plan real actions rather than replaying fixed motion sequences. It learns new physical skills directly from human demonstration, without motion-capture equipment, and executes them through AstraBrain-WBC, a billion-parameter Transformer-based motion model capable of generalizing stable, human-like movement to previously unseen actions. ET1 features a soft, rounded design with fully enclosed joints and skin-safe materials for safe use around families, including children, alongside a personalized motion library and a co-evolutionary learning algorithm that adapts its behavior to individual users over time.