Conversation so far:
What was Anya Jenkins a recurring character in?
I don't think Joss Whedon ever intended to have Anya around for more than one episode." However, Anya returns in the episode "Doppelgangland", duping Willow into assisting in a failed.

Question: Was she a friend of Buffy?
Self-contained rewrite: Was Anya Jenkins a friend of Buffy?