A hyper-realistic portrait painting of a Japanese robotic geisha featuring intricate kanji symbols and decals, rendered in stunning detail with octane precision. The piece captures a fusion of traditional elegance and advanced technology inspired by "Ex Machina" and "iRobot." Set in 4k and powered by Unreal Engine 5, the artwork exhibits flawless anatomy and impeccable design elements. The robotic geisha is portrayed with perfect harmony of form and function, seamlessly integrating mechanical features with traditional attire, all while maintaining a clean and polished aesthetic devoid of any visual errors or artifacts.