Gorai

Gorai is the infamous lord of the Northern Lands who forced Datara to wear demon mask and drove Tsugumi to seal Datara and kill her child during 1000 AD (Heian jidai). He is briefly mentioned by Sara at Yamasachi Village, and appears at Mount Mansetsu after abducting and forcing the villagers from Satsuki Plains to build a fortress by using the Demon Blood Binding Spell. He is later encountered at another demon fortress north of Sakata Village. He is last seen with Datara at Tempest Tower, where the final battle against the two takes place.

Quotes

 * "Here so soon? Hmph, Monk Sen turned out to be useless."
 * "Don’t make me laugh. Once I have the Kamui, not even Naraku can stand in my way."
 * "H-how dare you insult me!? As long as Datara has the demon mask, he will remain my slave!"