There are probably 'Rachel Berry fanfiction' stories that focus on her relationships. For example, a story could explore her relationship with Finn in an alternate universe where things turned out differently. It could show how they might have overcome more challenges together and grown even closer.
One interesting Finn Hudson and Rachel Berry fanfiction could be where they reunite after a long time apart. Maybe Finn has been traveling and he comes back to find Rachel on the brink of stardom. They rekindle their old feelings and have to navigate their new lives while still holding on to their past love.
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.
One possible plotline could be Rachel dealing with the reactions of her friends and family. They might be shocked at first but then come around to support her. For example, her friends could throw her a baby shower, which would be a really heartwarming part of the story.
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.
One popular baby berry fanfiction might be those that focus on baby berry's adventures in a magical forest. It could involve encounters with friendly woodland creatures.
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.
One popular 'Rachel Berry and OC fanfic' might be 'A New Star in Lima'. It often focuses on how the OC, an original character, interacts with Rachel Berry in the Glee club setting. The OC could be a new talented singer who challenges Rachel in a friendly way, leading to some great musical duels and character development for both.
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.
One popular 'Ross and Rachel' fanfiction could be those that explore what would have happened if they got back together right after their big fight in the show. There are also ones that might focus on their relationship during the time they were secretly in love but not admitting it. Another type could be fanfictions that create alternate universes where they meet under different circumstances, like in a different city or having different careers.
Some fanfictions focus on an alternate universe where Rachel and Finn are in different high school cliques. But they are drawn to each other because of their shared love for music. They secretly start a band together and their relationship blossoms from there.