RyuZU is a key character from the anime series Clockwork Planet. She is an automaton, specifically an exquisite and highly advanced mechanical doll created by the legendary clocksmith Y. Despite her mechanical nature, RyuZU possesses a unique personality, characterized by her loyalty and sharp wit. She serves as both a protector and companion to the protagonist, Naoto Miura, after he revives her. Throughout the series, RyuZU plays a crucial role in the unfolding events, showcasing her combat abilities and unwavering dedication to Naoto while exploring themes of humanity and purpose.