You have eight of the most powerful humans in the world, who can multiply themselves,
shapeshift, possess bodies, even one who is immortal. Yet the most important thing preventing you from ruling Japan,
and the driving force of the narrative, is.....cash.
Eight of the strongest beings who decide to attack the
hero one at a time...for some reason.
Also the girl "Ninja" was useless. Her only purpose was to add to the random and pointless gratuitous sex. She
gets raped twice and then with her last deathbed request is denied sex. Sucky life. Because apparently you can't
make most anime without a spoonful of rapey rapey.
Not even logical rape. Like that shadow villain needed to fingerbang the girl to make her into a drone.