The Rats in the House of the Dead is an underground organization led by Fyodor Dostoevsky. The Decay of the Angel was a terrorist organization that has long since been hiding in Japan, operating as a murder association Although he's a very enigmatic individual, Fyodor is a man who is known for his cunning, unpredictable and sinister nature that's comparable to Osamu Dazai. He is regarded as a monster