A dragon daiyōkai who fought with Inu no Taishou. He never was able to fully kill Ryukotsusei but managed to seal him into a dormant sleep with one of his claws. Naraku had removed Inu no Taishou's claw, reawakening Ryukotsusei, in hopes that he would be able to destroy Inuyasha.
We don't have any info about Ryukotsusei's related characters. Help us fill it in!