Once, Coco prevented her brother, Trevor, from eating a piece of bread with gluten in it. Trevor is discovered to have Celiac disease and Coco makes the realization that she is, in fact, a witch. Coco becomes enlisted by various Beverly Hills socialites to perform her powers for them until Coco's father chooses to admit her to Miss Robichaux's Academy. When at the Academy, Coco insists there is nothing special about her and her gluten-detector powers. However, Cordelia ensures that her powers will grow and that predicting or sensing danger is useful before enlisting Mallory to give Coco a tour of the Academy. At some point after this, Coco is officially admitted into the Academy. 
Personality and Appearance
Coco is a bossy and entitled woman in her mid-40s. She has aspirations of being a social media influencer but seems clueless about how to do so, enlisting the help of her younger personal assistant and hairdresser to help her in her efforts. Due to her affluent upbringing, Coco does not have some of the life skills that most people develop, relying on others to help get her through the day. Before the apocalypse, Coco dresses stylishly and ensures she always looks on trend. Upon her arrival at Outpost 3, she is forced to wear 18th-century style clothing due to her 'purple' status. Mr. Gallant still regularly styles her hair to fit this look.
Later in the series, Coco was shown to have a positive side. It was later revealed that she was first reluctant to enroll at Miss Robichaux's Academy because she thinks that she is not as talented as the other witches. But after some thorough encouragement from Cordelia, she finally accepted herself as a real witch. She quickly became friends with Mallory, Queenie, and Zoe. She also showed loyalty to the Coven by accepting Cordelia's task to track down Ms. Mead and even risk her own life by trying to capture her. Her loyalty was also seen unfading when she was just resurrected by Cordelia and stood up with them to fight Michael Langdon. Coco was also seen to have aspirations on finding a place where she truly belongs, very much same as Misty Day and to develop her skills to fulfill her desire of helping people with her powers.
Coco is getting her hair styled by Mr. Gallant at a salon in Los Angeles in an attempt to launch her career as an Instagram Influencer. Everybody's phones suddenly receive an emergency alert that a ballistic missile is heading towards Los Angeles and to seek immediate shelter. Coco dismisses it as a hoax until her father FaceTimes her to tell her that the threat is real and that a missile is also about to hit Hong Kong, where he, her mother and brother are. He tells Coco that he has four places reserved for their family at a safe location but that they are not going to make it and instructs her to get into a car and go to Santa Monica airport where a private jet is waiting to take them to safety.
On their way to the airport, Coco calls her husband Brock and tells him to meet her at the airport. Coco's personal assistant Mallory tells Coco that she needs to go home but Coco begs her to stay, telling her she would be lost without her and offers her brother's ticket, to which Mallory agrees. As they arrive at the airport, Mr. Gallant and his grandmother Evie show up. Mr. Gallant tells Coco that he heard her father say there were four spaces and that he and Evie are here to take the remaining two. Coco tells him that they can't as Brock is on his way, but Mr. Gallant tells her that he'll never make it in time due to the chaos on the roads. Coco reluctantly agrees and calls Brock, who tells her that he is stuck in traffic. She sees a group of men coming to try and steal the plane and is forced to leave Brock behind, boarding the plane before the men can take it.
Onboard the plane, Mallory goes to the cockpit to ask the pilots where they are going but finds that the plane is unmanned. Suddenly, the missile hits Los Angeles and the plane begins to rock violently, but it restores itself quickly. Coco, Mallory and Mr. Gallant look out of the window to see a mushroom cloud rising where Los Angeles has been destroyed.
A few weeks later, Coco is struggling to adapt to life at Outpost 3. She has been giving purple status and is made to wear 18th-century clothing. Mallory, who has been made a gray, asks Coco if she has spoken to Ms. Venable about being made a purple, but Coco tells her that Venable scares her.
After eating her cube for dinner, Coco protests that she is still hungry and demands better food for the $100 million ticket price. Venable overhears this and slaps her to the shock of everyone at the dinner table, causing Coco to back down. Coco is later horrified when the group realizes Stu has been served as dinner, telling Mallory to come and stick her fingers down her throat.
Eighteen months pass without the residents of Outpost 3 being rescued and they gradually lose hope that help is coming. After being told by Venable that they are cutting down to one meal a day, Coco questions the point of the entire operation as she believes they are just waiting around to find out how they die. 
Coco is a natural born witch who has manifested two of the Seven Wonders.
- Divination - One of the Seven Wonders, the magical ability to gain knowledge through indirect means.
- Danger Detection - An unusual skill, Coco has the power to detect imminent danger, for example, stopping her brother from eating gluten, after which it was revealed he had a gluten allergy. Upon meeting Cordelia Goode, Coco was told that her ability was not just gluten detection, but the ability to detect danger. She used it with more serious goals at Cordelia's behest to identify Ms. Mead as the satanist traitor.
- Gluten Detection - The magical ability to detect if food has gluten in it or not. Coco was able to sense that a biscotti had gluten in it, stopping her brother from eating it.
- Calorie Detection - The magical ability to detect how many calories food has.
- Transmutation - One of the Seven Wonders, the magical ability to instantaneously move from one place to another. This power is more commonly known as Teleportation. She proved this in Fire and Reign when Michael Langdon broke into Miss Robichaux's Academy and she, Mallory, Cordelia, Myrtle and Madison escaped using this power.
- Coco: "For a hundred million dollars a ticket, I expect goddamn Gordon Ramsay in the kitchen cooking us real food!"
- Coco: "I have a rule against eating things with no legs or too many legs."
- Coco: "Just don't let me die again, okay? It really sucked the first time."
- To Cordelia Goode: "I would do anything for the coven."
- To Mallory before the Identity Spell: "How could I be mean to you? You've taught me everything I know. You saved my life. You are my best friend, Mallory, and I am so sorry for whatever comes out of my mouth on the other side."
- She is the third character portrayed by Leslie Grossman. For a complete list of her characters, see Cast.
- She is one of the first Apocalypse characters to have been confirmed. 
- Leslie Grossman described Coco as "she's what the kids call "extra"." 
- Leslie Grossman partially based her interpretation of Coco on Tinsley Mortimer from The Real Housewives. She thinks that Coco is not burdened by any sort of conscience, and described her as ruthless and self-focused. 
Mr. St. Pierre VanderbiltMr. St. Pierre Vanderbilt is Coco's billionaire father.
He admitted Coco to Miss Robichaux's Academy after she had discovered her power, although Coco was reluctant at first.
In October 2019, while Coco is getting her hair styled in a hair salon, everybody's phones suddenly receive an emergency alert that a ballistic missile is heading towards Los Angeles and to seek immediate shelter. The World War III has begun and nuclear bombs are dropping. Coco dismisses it a hoax until her father immediately FaceTimes her to tell her that the threat is real and that a missile is also about to hit Hong Kong, where he, Coco's mother and brother are. He tells Coco that he has four places reserved for their family at a safe location but that they are not going to make it and instructs her to get into a car and go to Santa Monica airport where a private jet is waiting to take them to safety. The call suddenly goes off.
- See also: Coco St. Pierre Vanderbilt/Media
- ↑ Episode: Boy Wonder
- ↑ Episode: The End
- ↑ Webb Mitovich, Matt (2018-08-03). American Horror Story: Apocalypse Characters Include Billie Dean, a Bitchier Madison... and the Harmon?. TV Line. Com. Retrieved on 2018-08-03.
- ↑ Leslie Grossman describes Coco on Twitter (@MissLeslieG) (2018-09-12).
- ↑ Gennis, Sadie (2018-09-13). American Horror Story: Apocalypse's Leslie Grossman Tells Murder House and Coven Fans to "Be Patient". TV Guide.com. Retrieved on 2018-09-22.
- ↑ Mentioned by Myrtle Snow