Abigail is revengeful, selfish, manipulative, and at the same time – magnificent liar. This young lady is uniquely gifted at spreading death and destruction wherever she goes. She has an awesome sense of how to manipulate others and gain control over them. All these things add up to make her an exciting antagonist. The character of Abigail is often accused of being one-dimensional, and there's more than a grain of truth in that accusation. She doesn't express even one little piece of compunction during the whole book. That’s why we can think of her like about the inhumanly devilish person. Abigail's actions are cruel and from time to time not understandable.
Abigail Williams in the Essays