"No," says Kade, after a moment of reflection. "Every single one of my students back home had to go back, but there's just as many people who go to Worlds and don't ever return. I know of at least ten that never get return Doors, and at least three that have only ever had one person leave, out of the dozens-to-hundreds of people who entered." He pauses. "In a way, this is a unique opportunity to get another look at a World that's likely just a World-to." He pauses again. "Though I guess it is possible that some people might return."