Hakutoku Ren

Hakutoku founded the Kou Empire after unifying three countries in order to save the people of Tenka in the extreme Eastern Plains, who were suffering because they were divided and constantly fighting against each other.
He had four children with his wife, Gyokuen: Hakuyuu, Hakuren, Hakuei and Hakuryuu.
Hakutoku and his two elder sons, Hakuyuu and Hakuren, died in during a revolt ten years before the start of the story, said to be orchestrated by remnants of Kou's defeated enemies.