RyuZU is a central character in the anime and light novel series 'Clockwork Planet.' She is a beautiful and powerful automaton—an advanced clockwork android—discovered and repaired by the protagonist, Naoto Miura. As Unit Initial-Y, RyuZU possesses immense strength and unique abilities, becoming Naoto’s loyal companion and protector. Her dignified yet quirky personality, devotion to Naoto, and mysterious past play a significant role in driving the story’s events and shaping the dynamics between the main characters.