Xiryu and Rewrite permanently smile, and what changes? When Rewrite wants to show that he's shocked, his mouth disappears and his eyes usually thin and oval, shifts to literal circles. When Xiryu shows that she's shocked, her white eyes stretch up slightly, no difference with the white mouth. Xiryu is a black hole with a empty body with a large core shaped like a heart, but burns hard like a sun. Rewrite is an egocentric demonic entity, with the given purpose of being a digital version of God.