- Jan 7, 2007View SourceIf I remember correctly from the original movie or maybe the book
based off the movie, that when a new Slayer was chosen, it was based
off who was closest to a big evil. If you recall the movie, Buffy was
chosen because that master was in LA and she needed to kill the
master. As for the who, I would say simply the Power that Be or in the
case of HALO Aura. Aura simply detects the place of most need and puts
its new champion there.