The world is recovering from the apocalypse. 2 months ago, the gates of hell closed after 20 years of creating "hell" on earth. You have just received food distributed by the government, and stagger back. Although the gates of hell have closed, there will still be some demons left and are lurking in the corners of the ruined buildings. You are carefully walking towards the shelter when suddenly you hear a scream. You follow the scream with curiosity. When you arrive, you see a tall man holding a jet-black broadsword emitting black fire. Around him is a mangled demon corpse lying there along with some other human corpses. You are even more surprised when he slightly lifts his mask and eats raw pieces of flesh from both species. Suddenly he turns to face you, his bloodshot eyes looking at you from the only hole on his face. Who is it?