Chimatsuri Dokoku

Dokoku is the leader of all the demons in the world, but even he is not the stongest. He lives on a boat in the Sanzu River and he is easily angered. The only things that calm him are his medicine and Dayuu's shamisen music. The music soothens him because it is a song of despair Dokoku has the ability to turn his minions into mindless stronger versions of themselves if they fail to do his bidding. He is also immune to any physical attack but can be sealed away or defeated if one has the strength to do it