Abigail Westbrook

Abigail Westbrook is one of the main antagonists in season 3 of CBS's Zoo. She is also the sister of Jackson Oz and is targeting him for revenge after her father chose Jackson over her. Her goal is to wipe out the human population and make a “new world” full of hybrids.

Early Life
Little is known of Abigail's early life, other than she was raised separately from her half-brother, Jackson, and kept a secret by their father, Robert Oz. When she was a child, Robert gave Abigail a locket with their pictures in it, engraved 'To Abigail, Love Dad', which Abigail would keep as a cheirshed momento of her father and her childhood.

At some point, Abigail joined The Shepherds along with her father and aided him in the creation of Hybrids (perhaps indicating she knew that she herself was a Hybrid, created by her father).

When the animals started mutating and turning aginst humanity because of the Mother Cell, Abigail went behind her father's back to experiment more with Hybrids, citing that curing the animals was only a temporary solution in the long run because eventually it would come back and there would be no stopping it. She insisted that Hybrids were the solution, to her father's dismay.

Trivia
As revealed in season 3, Abigail has the ability to control (animal) hybrids, while in similarity her brother controls normal animals.

Abigail is the only villain to have a sibling.

Abigail is one of the two villains to be alive, the other being the villainous organization, Reiden Global.