Hayden is a character in American Horror Story. She has a complex and often devious role in the series, getting involved in various dark and twisted storylines.
One of her memorable moments is when she reveals her true intentions to a certain character, which creates a huge shock. It really changes the dynamic of the story.
Without more of the horror story, we simply don't know. If Hayden is the one with a cut throat, it would likely be a central and shocking event in the story. However, if Hayden is the perpetrator, it would change the way we view Hayden's character completely. There could also be other interpretations, like Hayden being falsely accused of a 'cut throat' incident, adding more mystery and twists to the horror story.
In horror stories, 'cut throat' is often a very disturbing and violent act. Regarding Hayden, it's difficult to say more without further details from the story. Maybe Hayden is the perpetrator of the 'cut throat' act, or perhaps a victim. The term 'cut throat' might be used to create a sense of extreme danger and fear, which is typical in horror.
They could be original characters created by the fanfiction writer. Just two fictional people with their own personalities and backstories that the writer has developed specifically for this story.
Most likely not. The 'American Horror Story' franchise has a specific format for its official content. Since 'Pepper American Horror Story' isn't something that has been widely promoted or mentioned in relation to the official franchise, it's improbable that it is an official part of it.