Gorai

was the infamous Lord of the Northern Lands who came to the horoka shrine near Izayoi's mansion to steal the demon mask and invaded Shinonome Village as he interrupted Datara and Tsugumi's wedding ceremony, forced Datara to wear the demon mask and drove Tsugumi to seal Datara and her  during 1000 AD. He is briefly mentioned by Sara at Yamasachi Village, and appears at Mount Mansetsu after abducting and forcing the villagers from Susuki Plains Village 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, they're at the top of the tower.

Trivia

 * The same rulers in the two lands of Japan as Tōga of the west and Kirinmaru of the east.
 * Gorai didn't transform into his true form like Tōga, Sesshōmaru, Sesshōmaru's mother, and Kirinmaru.
 * At the top of the Tempest Tower, Gorai is the still alive as Datara defeated, he still be revived, and if Gorai is defeated, so does Datara.