A mysterious beauty who is also called HW9. Her real name is unknown and Sara is simply the name she has been given in Lags Town. She has a peculiar chemistry sending out shock waves every time she is touched by a man and her body temperature is always extremely high. As she floats in transience always on the verge of disappearing she begins to change due to her new environment and her encounters with Shu and the others. The confrontations between Shu and Kito that involve her continue to send shockwaves throughout Lags Town.