When they go forward to find the two adventurers— They don't find them. The fog covering the city grows denser and denser, until seeing two feet ahead would be a feat in and of itself. So long as Serge and Sephiroth would stick together, they wouldn't be separated. But should they move further than seven feet away from each other, they be separated.

"Hihihihihi..."

They could hear a feminine laughter coming from around them. The voice came from somewhere in the fog... And then Serge would feel a hand upon his shoulder. Is it Sephiroth? Or something else?