Royal Family from Another World

About half a year ago, the "royal family" traveled from another world. Their appearance is the same as that of humans, and they speak the same language as humans, but they possess "superpowers" that humans cannot understand, which are often referred to as superpowers. However, the royal family is not a kind person, but brings killing and disaster. What they want is the soul in human beings. In front of the royal family, human beings are vulnerable, and even the most elite special forces in the world can only contain them. At this time, the "Emperor" who can save mankind appears...