In the first AU:

Samantha Parker was an orphan but was adopted at age 6 by a woman named Danielly Parker, her husband Thomas Parker, and their 19-year-old son Daniel Parker. They were a singing band that performed in restaurants or clubs; she always went along. She had been fascinated by music since she was young. At age 13, her parents signed a 1-year contract with Jason (Timmy's father and founder of Showman's Pizza Place), who also needed an administrator but was having difficulty finding one since he needed two.

Samantha was very intelligent and knew about this branch of administration and wanted to help, but he wasn't sure if it was a good idea since she was a minor to work in an area that only adults know. But she insisted, making him let her, and that's how she became a junior administrator. There she met Matthew (the phone guy from the game), who was 18 years old, and Timmy, the owner's son, who was 11 years old at the time.

In 1996, at age 15, on Timmy's birthday, he wanted her to stay with him and his friends at the table, but she politely declined because she needed to deal with an urgent matter in administration. However, she said she would bring him a pizza when she returned. The robots introduced themselves first, followed by Samantha's family. Some time later, when she returned, she saw Jason distraught along with the parents of two boys. They said that Timmy and his friends had disappeared, which also made her desperate since he was her best friend. They started searching the pizzeria, and when Samantha entered a room, she found Timmy and his friends dead. She cried a lot, which caught the attention of the others, and they went to her.

That first tragedy stayed in her mind until she was about 16 years old, which made her quit her administrative job. Then one day, when her parents and brother were singing in a restaurant, something ended up burning the place down; everything went up in flames, and her family died to save her life. Over time, she began to become paranoid to the point of going insane, but some colleagues sent her to a psychiatric hospital for treatment until she got better.

At 18, after leaving the psychiatric hospital, she was still a little paranoid, but with the help of some medication she improved 100% (or almost). She became a security guard at an establishment. She met Matthew, and he told her that Showman's had closed the previous year because of the incident and that the animatronics were acting very strangely. She wasn't very interested in robots, so she didn't pay much attention.

In 2007, she continued working as a security guard but would visit Matthew because he was taking care of his mother, who was having some health problems, and she went there to help him since he was also her best friend. But one day he didn't return. She stayed with his mother and received a call saying that Matthew had been found dead in the semi-demolished warehouse. She went into shock but calmed down to avoid another paranoid episode. She told his mother but promised she would take care of her for a long time.

When Matthew's mother passed away, despite undergoing all the treatments, she got a job at the new Showman's Pizza Place pizzeria where she would be the night guard. When she entered, she saw Wendy (Mark's younger sister, whom she knew but hadn't spoken to much). Wendy would be the junior manager of the pizzeria, which reminded her of her past. The pizzeria had new, updated, and well-designed animatronics, but they also added characters that weren't in the previous restaurant: Peggy and Miss Melody.

Samantha watched Showman and Friends as a child and was fascinated by Miss Melody because she looked a bit like her, and she made her dye a streak of her hair red, but she never saw her in the restaurant as an animatronic.

Miss Melody is a princess, but she shirks her princess duties to pursue her dream of being a singer and dancer.

One day, Samantha was in a storage room looking at some objects, and Miss Melody was there for some adjustments. She noticed a presence behind her, and when she went to look, she was hit and murdered. The killer, to avoid leaving traces, placed her body inside Miss Melody's and left.

Some time later, she opens her eyes and gets up, somewhat dazed, but when she looks in the mirror and sees Miss Melody's body instead of her own, she spends hours in front of the mirror wondering how she woke up in the body of an animatronic. But then the memories come back, and she remembers the murder and that to avoid being caught, she put her body there. She looks in the mirror again and decides she will get revenge.

She talks to Wendy, who will now be the night guard. She explains everything to her, that she was Samantha. Wendy believed her, and Samantha, now Miss Melody, promised to protect her from anything.

--------------------------------------------------

In the second AU:

some things change from the first. The origin story was the same, but the tragedy was only one.

The characters in this second AU are not animatronics but real humans who dress up to entertain children. However, there is an evil spirit that controls a person's body, possessing them.

Samantha's family were the only attraction; they were the familyshows.

This tragedy happened first with the death of Timmy and his friends. They realize something is wrong with that pizzeria, but in their search for the entity, their parents and brother end up being killed by the entity, which possesses their bodies, kidnapping Samantha.

The souls of her family were absorbed by the entity.

The entity builds a new body, having a physical form (the figure), but instead of killing Samantha, it tortures her, leaving deep scratches on her abdomen, arm, and leg, and disappears, leaving her injured. The police and ambulance arrive in time and rescue her, but due to the trauma, she is sent to a psychiatric hospital.

Well, not much changes from there. She leaves the hospital at 18, works as a security guard, takes care of Matthew's mother, discovers that Matthew was murdered, and Mark is "missing."

But to work at the new pizzeria, she wouldn't be a night guard; she would play her favorite character, Miss Melody, in Showman's Pizza Place. She accepts the job.

In this AU, Samantha isn't murdered; she plays Miss Melody.

The evil entity was still at large, but it doesn't kill Samantha's colleagues; instead, it possesses them, leaving them possessed.

The possession is identified by the blackness of the eyes. And Samantha, who was the only one not possessed, protects Wendy.

Well, from the first to the second AU, only a few things change.