Kagemori Sessai is a warrior monk, who serves the new Kachūgakure and the Land of Whispering Bone along with the other sohei who migrated there from Whirlpool Nation. He is the leader of the Gateless Barrier (無門関, Mumonkan), a group of sohei who've sworn to protect Kachūgakure and the Whispering Bone from any and all incursions. He is also the co-founder of the Kagemori Clan, along with his wife, Hyūga Nijiki.