Snow gave it's evaluation after hearing Shu XinY's concerns, "I can't say about the "unidentifiable being" or why he can recognize you before you have entered the world. As you said, it must've something to do with his memories getting stronger. As for why he lives life from the start while you don't, may be because we are entering through the openings in the world. But that man must not be allowed or does not know how to enter the world from an opening. Considering how powerful and knowledgeable that man has shown himself to be, the man definitely knows that there are openings in between a world. That can only mean, he is restricted to enter worlds from the openings and can only enter through the very start."