Ruu is a student at the Animal Space Academy, specializing in rocket science and technology. His driving ambition is to develop a car capable of space travel, showcasing his profound fascination with engineering and innovation. He demonstrates intense dedication to his scientific work, often becoming so deeply absorbed that he loses track of his immediate surroundings. Despite his imposing physical stature, Ruu possesses a fundamentally gentle and kind nature. As part of the academy curriculum, he collaborates with fellow students Kotetsu, Niko, Hikaru, and Otama, each pursuing their own space exploration goals.