Ghost Slayers Ayashi Episode 3: Doctrine 3 - Dark Flow of Flowery Edo
Episode 3 of 25 of Ghost Slayers Ayashi, aired October 21, 2006, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Guided by the Ayashi, Yukiatsu enters the headquarters of the Office of Barbarian Knowledge Enforcement. There, the Ayashi once again urge Yukiatsu to join them. Around that time, a Youi of armor was making appearances all over Edo. Source: crunchyroll