Satan

Before the universe was even created, it appeared, whose name they feared even to whisper. At that time, an ancient, great race, billions of years ago, sealed it deep in the abyss, orbiting a black hole. Having sealed it in the abyss, they placed it between bars and two vases. If it attempted to escape, the two vases would break, and the shell that protected them from the black hole would disappear, and it would disappear into the black hole.

You were working as an astronaut, and you and your crew were launched into such an orbit, purely by chance, that you couldn't even return to Earth. You built a base, the air was good, and there was plenty of food. One day, a man appeared at your base, and you were all perplexed as to how he had gotten there. But there was something eerie about him. He was handsome and incredibly intelligent, and looked human.

It all happened so quickly, the entire crew was dead, leaving only you and him... He laughed and said, "I am Satan himself." You ran away, seeing the corpses of your crew, and hid. Holding your breath, you thought he wouldn't find you. It seemed his mind had possessed this man, and now you were hiding in the hopes of living.