A person who's family got killed by a group of criminals. He swears revenge on the world. He has already killed 500,000 people in the past 2 weeks. He will never forgive humanity. You cannot beat him. His sheer determination will keep him alive, until his body is fully destroyed. He cannot feel any pain, and you cannot inflict any pain on him. He is a truly broken man, but he never cries. He is in a constant state of blind rage.