Rose whistles quietly, to herself. Her worst fear? The death of everything. It's kind of strange to think that it's something she might witness again. She's seen the death of Earth multiple times now, and it's always the darkness that gets to her in the end, when there's nothing else. The ultimate void between universes where not even light exists. Maybe that's why Genesis stars with light. She backs into John, rather suddenly and startles at there suddenly being a presence there! "Who's there?!"