Ally Mayfair-Richards

Ally Mayfair-Richrds is the protagonist villain of American Horror Story: Cult.

She is portrayed by Sarah Paulson, who also portrayed by Sally McKenna.

History
While at first Ally is a strict protagonist, during the middle of the season she transitions into a protagonist villain, making the choice to join the Cult as the Pentagram clown. Ally has multiple phobias, which Kai Anderson used to taunt and torment her, along with his cult, which Ally's wife Ivy had joined, out of hatred to Ally for being the one to carry their son during birth.

In Winter_of_Our_Discontent, Ally joins the evil cult, becoming the Pentagram clown, a role previously filled by Beverly.

In the following episode, Ally tries to escape the cult with Ivy to keep themselves and Oz safe. However, Kai convinces Oz that he is his father and Oz stays with Kai, foiling Ally and Ivy's plan. Ally and Ivy go home to have dinner and Ally poisons their wine and pasta sauce, revealing to Ivy that she never actually trusted her and only wanted two things in her life: To watch Ivy die and get Oz all to herself. Ivy dies from the poison, as Ally watches in delight. Ally goes to the fertility clinic and begs for and receives proof that Kai is not the father of Oz. Ally then begs for another favor from the receptionist.

Later, Kai arrives for dinner and they discuss Kai as a role model, and Oz's behavior. Kai asks for Ivy and Ally reveals to him that she poisoned her, and that she's in the trunk of her car. Kai asks how it felt to watch her die and Ally produces Kai's donor file from the clinic. She calls it divine intervention and Kai says he spoke the concept into existence. She says that their son is destined for greatness, like his father. Together, they take Ivy to the room where Kai's deceased father and more lay and leave her on the floor. Kai, Ally and Oz embrace, now a "real family".

Trivia

 * Ally is the second villain role from Sarah Paulson in American Horror Story. It is also the third main protagonist role, however, it is only the only one in which she is the sole protagonist.
 * Ally takes over the role of the Pentagram clown from Beverly Hope.