Lyuze is a female robot who originally seeked revenge against Casshern for killing her sister and causing the Ruin.
Lyuze is a somewhat quite person, and is initially cold towards Casshern, although she is kind to those who have done nothing wrong (like Ringo). She follows Casshern in an effort to kill him and avenge her sister Liza, who was killed by Casshern prior to causing the Ruin. She does not kill him immediately, as she finds it cruel to kill someone who doesn't even remember their own name. After following Casshern for a while, she comes to know him better, and realizes that he really does regret what he has done and is doing whatever he can to fix it; she travels with him then to aid him. Over time, they become close, and she eventually falls in love with him, and the feeling becomes mutual.