Hoshin Engi(1996)

Houshin Engi

When his clan is wiped out by a beautiful demon, young Taikobo finds himself in charge of the mysterious Hoshin Project. Its mission: find all immortals living in the human world and seal them away forever. But who do you trust--and whose side are you really on--when you've been trained to hunt demons by a demon?

(Source: Viz Media)