Jigen Daishi

An Outsider who washed up on the shores of Tenguu Island, the leader of the Red.
He is a hero who saved the people of the Red with his knowledge from another world, who were shunned because of their cursed blood.
He is the only person who knew Tokisada before.

He is Akaza's father. In "Catharsis" he keeps a watchful eye over the island's developments in order to ensure that Akaza succeeds him as leader of the Red.