Love against all odds is also a big theme. Even though they are in a professional - employer/employee relationship at first, their love overcomes the boundaries and potential problems that come with such a situation. It's like they can't help but fall for each other despite the work - related complications.
Another theme could be self - discovery. Bella might find out new things about herself while working for Edward. She could discover hidden strengths or talents, and this growth is often intertwined with her relationship with Edward. As she becomes more confident in her role at work, her relationship with Edward also deepens.
A common theme is the power dynamic. Since Edward is in a position of power as the hirer, there's often a play on that in the relationship. For example, he might be protective of Bella in the workplace in some stories.
Independence is a common theme. Without being tied to Edward, Bella can be shown as a more self - reliant character. She can make her own choices, pursue her own dreams, and not be influenced by the over - protective nature of Edward.
One common theme is the struggle between two worlds. Since she is part vampire and part human (or has strong ties to both), she often has to find her place. For example, in many stories, she has to deal with the secrecy of the vampire world while still wanting to be part of normal human society.
One common theme is the exploration of their eternal love. Writers often expand on how their love endures through different challenges. Another theme is the power dynamics, especially considering Edward's vampire nature and Bella's human - turned - vampire state in some stories.
A lot of these fanfictions also deal with the idea of acceptance. Bella has to accept her new state as a vampire, and the Cullen family has to accept her as one of their own. There are often challenges and conflicts related to this acceptance process.
A common theme is protection. Edward sees himself as Bella's protector, so when he punishes her, it's often because he believes she has endangered herself.
One common theme is the exploration of their love in different situations. For example, in some fanfictions, they face new threats to their relationship, like a new vampire clan that doesn't approve of their union. Another theme is the power dynamics between them. Since Edward is a vampire with special abilities and Bella is a human (at least initially), how they navigate that power difference is often explored.
Often, there could be themes related to the breakdown of trust. If Bella cheats with Edward, it would shatter the trust that exists in their relationship. Also, themes of jealousy might be present, not just from the partner who is being cheated on, but also from other characters who might have an interest in either Bella or Edward. There could also be a theme of self - discovery, as Bella might be exploring a different side of herself through this act of cheating.
Love and devotion are very common themes. Since they are mates, their deep love for each other is often explored. Another theme is the struggle between their different natures, with Edward being a vampire and Bella being human. Protection also comes up a lot, as Edward is always eager to protect Bella.
The theme of acceptance is quite prevalent. Edward and Bella come from different worlds, and with Viola in the mix, there's a need for acceptance. Whether it's accepting each other's flaws, or accepting the new dynamic that Viola brings to their relationship. Additionally, the theme of fate often pops up. It's like they are fated to be in this complex relationship, and the fanfictions explore how they deal with this pre - determined path.
Love and attraction are very common themes. Since it's Bella working for Edward, there's often a build - up of romantic feelings as they interact in a professional setting.