Mary Warren was used by Proctor in the court scene to hopefully prove his innocence as a witch. However, Mary Warren is also branded as a witch by Abigail when she contrives a devilish bird in the sky that she screams was sent by Warren herself. In the Crucible, Warren doesn't really have a good track record with either side as she just ends up getting manipulated.
Mary Warren is a pawn throughout the entire play. ... Mary is used by Abigail Williams to cast guilt on Elizabeth Proctor by bringing a poppet into her house. The poppet has a pin in it, and it is used as evidence to prove that Elizabeth harmed Abigail with the pin and the doll.
