For the longest time, I thought that Bishamon was the actual character you played with. But from reading this story, I understand that Bishamon is actually the samurai and that the samurai armor is called ‘Hannya’. Is his story like Nightmare’s Soul Calibur story where Siegfried/Bishamon takes the sword/armor but becomes possessed?
Also, who is this Oboro character? In Vampire Savior, sometimes you fight him after your final opponent. He looks like a glowing Bishamon.