Geppei

Geppei was the chief adviser of Fujiwara Ishimaru. He brought many innovative techniques and ideas to the leader of JAPAN, from agricultural to military. However, he was best known/remembered for three deeds:
 * 1) The creation of Tenshiism
 * 2) The invention of the Yin Yang Ways
 * 3) The sealing of Demon Xavier

His scythe is passed down through generations to the leader of Tenshiism.

Unknown to most of the world, Geppei is a devil under the command of the Devil King Rasaumu. The ceremonies he developed for Tenshiism take the souls of the deceased out of the cycle of reincarnation, and sends them to the Devil King. He inflated Fujiwara Ishimaru's ambition, convinced Fujiwara to go on conquering the main continent, so that the army of JAPAN could be a carrier spreading Tenshiism to the rest of the world. Xavier's Demon Army devastated the entire army of JAPAN, and utterly ruined Geppei's plan, causing Geppei to have a great feud with Xavier.

During his fight with Xavier, Geppei suffered great injuries even for a devil that after a few years he passed away. Prior to his death, he took on the leadership of the Fujiwara House for a while (Fujiwara Ishimaru had died fighting Xavier). Whether out of disinterest or a lack of political abilities, Geppei was unable to maintain the power and influence of the Fujiwara House over JAPAN. He spent the last of his years focused on spreading Tenshiism throughout JAPAN. So great was he bitter against Xavier that he also ensured the techniques for sealing Xavier will survive through Tenshiism in case Xavier ever reawakens.