Sofia
Background
Sofia Cox is a twelve year old resident of Greenwich, Connecticut. Her mother is Alex Cox and her father is Harry Cox.
During the events of Hashtag Horror (2015) played by Bridget McGarry
At Alex Cox's house, Georgie asks Sofia why she invited Sam, Francesca says she doesn't like Sam, and Ava says Sam smells weird. Sofia then tells them Cat invited her. Sam walks up and hears them talking about her and tells Sofia her house is nice, and Sofie tells her she hates it and her old house was bigger. Georgie and Ava wonder where Cat is and when Sofia reminds them her mom died recently, Francesca mentions the rumor that Cat's mom died overdosing on pain killers that Dr. White gave her. Cat arrives and the girls try on dresses and as they do, Cat posts images of them online the entire time. Sofia asks Cat to take their picture and Cat tells them they all look stupid. Cat tells them the story she heard about the house and Ray Jameson. Sofia accuses Cat of lying again and then tells her to take a photo of her and the others. Cat takes a photo of them with her phone and then hash tags it "FAT UGLY BITCHES". Sofia sees the tag and tells Cat she is mean and Cat calls her a hypocrite and tells Sofia she only acts nice. Georgie tries to change the subject and Cat says she looks like a fat little sausage in her dress. Sofia tells her she is being mean, but Cat insists she isn't, because some of the girls laughed including Sam and Ava. Alex walks in and talks to the girls as she talks with Tatiana on her cellphone. Alex tells Sofia she is going to be gone for an hour and offers to bring home a pizza, but Sofia tells her they are all on a diet. Before leaving, Alex tells the girls getting ready is better than any party they will ever go to and to enjoy themselves when they are young. Sofia and the others start playing with Alex's jewelry and when Sam puts on a tiara, Francesca tells her she isn't a princess and Sofia takes a photo of her with her cell phone and tags it as poor girl. Cat finds a gun and starts pointing it at the others. When Francesca tells her to put it down, Cat accuses her of being a lesbian. Sofia is cutting herself in the bathroom when Georgie knocks on the door. Sofia opens the door and tells Georgie she is free to vomit and they all know she pukes in the toilet. Afterwards Cat, Ava and Francesca start picking on Georgie about her weight. Sam tries to make Georgie feel better by telling her she is funny, and Cat says it is because fat people make people laugh. Cat continues to make fun of Georgie and tells Georgie she should kill herself. Sofia tells Cat she went too far and eventually kicks her out of her house after Cat continues to bully Georgie. Cat begs to stay and then runs off. Sofia and the others take selfies in front of the art in her house. Georgie looks at her phone and sees Cat has posted a GIF of her eating with the hashtag "FAT TRANNY BITCH" and tells the others that no matter what, she will always be known as fat, because the picture Cat posted will come up if anyone searches her name and her life is over. She admits to the others that she has an eating disorder. Sam tries to comfort her and then they all get on their cellphones. She suggests they stop looking at their cellphones and Sofia agrees and takes their cellphones and locks them up and then throws away the key outside. Georgie pours everyone an alcoholic drink and they get drunk. They all start dancing and someone posts a photograph of them with the hashtag die bitches. Sofia and the others play the honesty game and learn depressing facts about each other and their parents. Sam has a premonition of blood flowing and the others see her scars from self harming. She suggests they listen to music and they put on artistic masks found in the house and dance. The doorbell rings and after Sofia opens the door, Dr. White bursts in. He goes looking for Cat and then threatens Sofia and the others, and tells them they only care about themselves and should be institutionalized. He grabs a knife and Ava runs off. Sam goes looking for Cat. Dr. White leaves and Georgie and Francesca bully Sofia about Alex having slept with Dr. White. Sam runs into the house and tells the others she saw a car covered in blood and when Sofia recognizes it as Harry's, she accuses her of lying. Sofia then tells Sam that she has to leave. Sofia leaves to go look for Cat. Sofia finds Harry's car and finds him dead. Sofia calls Alex using Harry's phone. Alex tells Sofia she is through with who she believes is Harry and hangs up and turns off her phone. Sam finds Sofia and tells her to go to the neighbors house and ask for help while she calls the police. Dr. White apologizes to Sam and tells her he didn't think Cat would hurt anyone and is then shot dead by Sofia as Cat watches. Sam tells Sofia, the murderer is Cat and they watch the murders happen on Cat's phone.