she used to be my favourite sweetie~~ i lost her when i had come back from vacation and ignored the town for a week.... bump for her~~ she deserves a nice home~~
Well, I believe someone with 9 villagers must visit you (or is it you visit them? I'd try both) and then she would be in their town, thus you're able to save her!
but if you want to get her back you must go through the 16 villager cycle ;~;