Conversation so far:
When did Anya Jenkins first appear as a character?
the Anya Jenkins character appears as a guest star in the third and fourth seasons of the show before becoming a series regular.
Was the character of Anya Jenkins a villian in the program?
Anyanka has come to Sunnydale in response to the distress of Cordelia, who is upset after catching her boyfriend, Xander Harris, kissing their friend Willow.
Did Anya Jenkins help Cordelia or hurt Willow?
Cordelia states: I wish that Buffy Summers had never come to Sunnydale. Anya shows her true demon face to Cordelia and says, Done. and the world changes

Question: What happens after that?
Self-contained rewrite: What happens after Cordelia states: I wish that Buffy Summers had never come to Sunnydale. Anya shows her true demon face to Cordelia and says, Done. and the world changes?