Code Geass: Renya of Darkness

Set in Japan during the 1860s Edo period, *Code Geass: Renya of Darkness* follows a young boy named Renya, who possesses a mechanical arm. His path crosses with an enigmatic, ageless immortal witch known as Reifū C.C., who is in search of partners to form a new covenant. Accompanying her is a contingent of foreign soldiers from Great Britain, on a mission to retrieve a missing girl and bring her home. However, lurking behind the British forces is a dark-haired man with piercing purple eyes, who commands mysterious entities called "knightmares"—and these beings stand as formidable adversaries against Renya and his companions.