She tryed to play the voice of the First Slayer. Buffy asked that the First Slayer speek for her self...
Buffy: (whispers) I'm never gonna find them here…
Tara: Appears opposite Buffy on the dune, walking toward her. She is dressed in Indian garb, midriff and skirt. Again, preternaturally calm.
Tara: Of course not. That's the reason you came.
She stands a ways apart, the two of them regarding each other.
Buffy: You're not in my dream.
Tara: (agreeing) I was borrowed. Someone has to speak for her.
Buffy: Let her speak for herself. That's what's done in polite circles.