A common theme is the struggle with the supernatural and human relationship. Since Bella is human and the Cullens are vampires, there's often the theme of how they bridge that gap. Another theme could be jealousy among the Cullens as they all vie for Bella's affection in different ways.
Well, the theme of sacrifice often comes up. Each Cullen might be willing to sacrifice something for Bella, be it their own desires or their place in the vampire family. There's also the theme of acceptance. Bella has to accept the love of multiple beings in a way that's not typical in the human world. And then there's the theme of transformation, not just in the literal sense of potentially becoming a vampire, but also in how their relationships transform as the story progresses in the fanfic.
There are quite a few. You can try looking on fanfiction websites like Archive of Our Own. There, you'll likely find numerous stories centered around the Cullens all loving Bella. Just search for relevant tags such as 'Cullens', 'Bella', and 'love' to narrow down the results.
One common theme is the exploration of their deep emotional bond. Since their relationship in the original story is so intense, fanfics often expand on how that translates into a physical relationship. Another theme could be the consequences, like how it affects their relationship with other characters.
A theme might be the exploration of the Cullens' unique vampire world from Bella's perspective. How she experiences their powers, their family dynamics, and how it all ties in with their relationship. For example, her learning about their hunting habits and how that affects their interactions with her. Also, the idea of Bella being a human in a vampire - filled world and how she overcomes the challenges that come with it, like the danger she poses to the Cullens by her very presence due to her blood's allure, and how they deal with that together.
Yes, it is quite common. Fanfiction writers often use this scenario to explore the relationship between Bella and the Cullens. It gives an opportunity to show the Cullens' caring side towards Bella.
A major theme is family. The fanfictions usually focus on the bonds between the Cullen family members, how they support and sometimes clash with each other. Also, the idea of immortality and how it affects their lives, relationships, and view of the world is quite common.
One common plot point could be the Cullens isolating Bella at school. They might spread rumors about her or use their popularity to make her an outcast. Another could be them using their supernatural abilities to intimidate her, like Edward using his mind - reading to embarrass her in front of others.
Well, it could be due to the way the Cullens interact with the other people in Forks. If Bella notices that they are being manipulative or using their powers in a way that she doesn't like to influence the townspeople, that could make her start to hate them. Also, if there is some kind of power struggle within the Cullen family that starts to affect Bella negatively, like she gets caught in the middle of it or she sees how it's causing harm to those she cares about, she might turn against them.
A common theme is the struggle with destiny. Since the imprint is a kind of pre - determined connection, Bella often struggles with whether to accept it or fight against it, as she has prior relationships in the Twilight world. Paul also has his own internal battles regarding the imprint.
I'm not sure specifically as there could be many different takes on it. Generally, it might be about Bella using her singing in a context related to the Cullen family in a fan - created story.
She might start by giving them the silent treatment. Just ignoring them completely when they try to talk to her, which would be a very human way of showing anger.