In relation to What Happened to the Mouse?, many of the characters stopped appearing after the original Name Week had ended. It was around that time that the main building they were all staying in collapsed. As many people stopped posting then, it's thus implied that a large majority of those characters never made it out.
Due to Prophet's disappearance from the thread for two months, the last that was seen of 15 was her falling unconscious after a beast attack. With the return of both Prophet and 15, it's shown that she's alright and has reunited with her brother and daughter. But since there's been a skip since then, she was still in the building when it collapsed. Meaning that either she got out when no one was looking, or she was the only survivor.
