It could lead to a major shift in the story and dynamics among the characters. Maybe the other characters would struggle to cope with the loss and it could change the entire tone of the fanfiction.
There are many possible fanfictions on this topic. One could be where Rachel is bullied for her over - the - top ambitions in the Glee club. Maybe some of the other members are jealous of the attention she gets from the teacher and start to spread rumors about her, which makes her feel isolated.
Well, it would surely change her relationship with Finn. If he's the father, they might have to grow up really fast and deal with adult responsibilities. Their relationship could become more serious and they'd have to support each other through the pregnancy. With her friends in the Glee club, like Kurt, he might be super protective and offer fashion advice for maternity wear. Mercedes could be there to give her emotional support and advice on how to stay strong during the pregnancy.
Well, it could start with small incidents. For example, some mean comments during rehearsals. Then it might escalate to more public shaming like someone posting an embarrassing video of her singing a wrong note on social media related to the Glee club. As it progresses, Rachel might become more withdrawn, but then she could find an ally in someone unexpected, like a new member of the club who has also faced bullying before. This new bond could give her the strength to fight back against the bullies.
I'm not sure of specific popular fanfictions about Rachel Berry's death. Fanfiction can vary greatly in quality and content. Some might explore her death as a way to show the impact on the other Glee characters, like how Finn might react if Rachel were to die suddenly. It could also be a very dark take on the generally upbeat Glee universe.
She could die in a car accident. Maybe she was driving to a big performance and got distracted by thinking about her career and future, and crashed. Another possibility is that she might have some sort of health issue that was never revealed in the show, like a heart condition that suddenly gets worse.
A possible plot is that the pregnancy is a surprise to everyone in the Glee club. Her friends rally around her, some being overly protective while others give her tough love. Rachel could also struggle with the idea of motherhood because she's always been so focused on her own stardom. She might start writing songs about her pregnancy experience, which then become a big hit within the Glee club and even outside.
It could be an overzealous security guard. If Rachel was at a high - profile event and the security guard misinterpreted her actions as something threatening or against the rules, he could be the one to call the cops and get her arrested.
Finn could be involved if the fanfiction wants to explore a relationship with him as the possible father. He was an important part of Rachel's life in the original series, and his reaction to the news would be significant.