Sarah Quinn is one of the main protagonists of Goosebumps 2: Haunted Halloween. She is portrayed by Madison Iceman, who also played Bethany Walker in Jumanji: Welcome to the Jungle and Jumanji: The Next Level.
She is first seen wanting to get in college but then her boyfriend Tyler Mitchell comes by for a visit and brings her Pringles and Red Bull. But her mom Kathy catches them she tells Tyler to go home and her son and daughter to go to bed.
The next day she is getting ready for school and at the convenient store she apologizes to her mom for what happened last night and she was put in charge of the boys all week. She is next scene at the school library telling her boyfriend that His account is frozen and it will cost him 40 bucks to fix it but he spent it on concert tickets. Later that night she goes to the concert to see her boyfriend but he was with another girl when she comes home She feels left out the next day. Tyler apologizes to her surprised that she saw Slappy in her locker. then at the end of the school day she drives the boys home and then they told her that Slappy is evil.
At home Kathy who is holding Slappy is surprised because she saw him then she gets a call from the school saying that Sony. Accidentally blew up the science lab and cancels Halloween for the three kids. Then they take Slappy to the river but he escapes later that night they read about what happened in the first movie and then they find out that he has an evil plot to bring Halloween to life.
They go after the book that Tommy Minagin stole from them after they find the book at his house. And get attacked by gummy bears they go after the monsters then. Kathy gets taken and the book gets stolen they get help from their friend and neighbor Mr. Chu with camouflage then they go get sloppy in the tower who turned Kathy into a dummy. After they use the book on the monsters Kathy gets turned back to normal and they get a visit from .RL Stine then at the end of the movie she gets excepted into college.