After finally getting into the main room to stop the chaos in order to free Tokyo you come across… A regal voice you heard from a distance…
…So you have come thus far. Know this, assemblage of God’s puppets and pitiful son of man whom he has led astray…
He finally shows himself… you would notice that a tumor-like protuberance on his left arm, which is because he had been fused with the human known as Walter.
I am the radiant morning star, which lights the way to the sons of man. I am the true flame of life in all the glory of flesh, blood, and my own will. So come, ye lifeless puppets of God! I shall snuff out your ostentatious lights.
He would look at you with his dark eyes gazing at you.
Look upon me and behold the Demon Lord Lucifer. The light of hope you saw in the world of the sons of man... will it shine without wavering, even before me?
It seems Walter made a deal with Hikaru to sacrifice his humanity to become the demon lord himself…
Behold the power of chaos!