Inugami Rou

A major antagonist in the manga and the anime's second season. Like his mother, Roh once used to be human, but his father, King Engai, raised him as an Inugami, so that he would forget his past as a human being and serve Engai as his heir. As such, Roh became the prince of the Realm of the Dead and didn't know about his mother until he had grown into a young man and met her again in Episode 46.