the last incarnation of this game, back when there was a greatestjournal, began with phaedra and anita driving across the country to sunnydale. ;) if i remember correctly, the story was that edward sometimes worked with phae, and that was how they'd met initially. totally up to you if you want to keep that or throw it out.
but yeah, i'd think either edward told anita, or phaedra gave her a call.