Power dynamics is another important theme. The Volturi are a powerful coven, and Bella being the queens' mate changes the power structure within the coven. This can lead to intrigue, jealousy, and power struggles among the members.
The theme of identity also plays a role. Bella has to redefine herself as she is no longer just a human in love with a vampire (Edward). She now has a new identity as the mate to the Volturi queens, and this fanfiction often explores how she navigates this new identity and how it affects her relationships with others.
There is also 'Bella and the Queens' which focuses on the cultural differences between Bella and the Volturi queens. It shows how they try to overcome those differences to form a strong bond as mates. This fanfiction is quite interesting as it gives a fresh perspective on the Twilight universe and the Volturi.
Edward Cullen might also be an important character in some aspects. Since Bella was originally in a relationship with him, his reaction to Bella becoming a mate to the Volturi could be an interesting part of the story. There could be scenes of jealousy or attempts to win her back.
In a lot of fanfiction, the idea of Bella being the mate of the Volturi kings is quite common. It allows for a whole new set of stories to be told. Writers can play with the power dynamics, the love triangle aspect if you consider her previous relationship with Edward, and the whole vampire world politics. This type of pairing can lead to very interesting and complex storylines that draw in readers who are interested in exploring different facets of the Twilight universe.
One common theme is forbidden love. Since the Volturi are vampires and Bella Swan's cousin is human (usually), their relationship goes against the norms of both their worlds. Another theme is the power struggle. The Volturi are powerful, and the cousin may have to navigate through that power structure. Also, self - discovery is often present as the cousin discovers new aspects of themselves through this unusual relationship.
A strong plot is important. For example, it might involve conflicts within the Volturi due to Bella's presence, or external threats that they have to face together. Also, the characterization should be on point. The Volturi kings should be portrayed as complex characters with their own motives and personalities, and Bella should also have her own development in the story. It can't be just a one - dimensional love story.
Love and loyalty are also big themes. Bella has to figure out her feelings for the Volturi kings while also dealing with her past relationships. And the Volturi kings have to show their loyalty to Bella in a world where they are used to being in control.
Power is a common theme. The Volturi are a very powerful coven, and Bella's relationship with them often involves her dealing with their power. Another theme is loyalty. Bella has to decide where her loyalties lie - with the Cullens or with the Volturi. And of course, love. Whether it's her love for Edward or some new relationships she forms within the Volturi world.
The idea of Bella being the mate of the Volturi king is appealing because it's a big change from the original Twilight storyline. It creates a whole new set of relationships and power dynamics to explore.
Another plotline could involve Bella being used by the Volturi in their political games against other vampire covens. She, being a human - turned - mate, has unique abilities or a certain influence that they want to utilize for their own gains. And as she realizes this, she has to figure out how to resist or turn the situation to her advantage.
One popular 'bella is volturi kings mate fanfiction' is 'The Volturi's Queen' which explores Bella's relationship with the Volturi kings in great detail. It has a unique take on how she fits into their world.