Garrett might change Bella in terms of her courage. For example, he could be very bold and adventurous, and through their interactions, Bella becomes more like him, less afraid to take risks. He might take her on various escapades that force her to step out of her comfort zone, gradually making her a more fearless person. In addition, his unique perspective on relationships could also influence Bella. If Garrett has a more carefree and open approach to friendships and alliances, Bella could start to adopt some of those traits, becoming more open - minded in her interactions with others.
Family dynamics can also be a theme. Since the 'bella sister' part implies a family connection, there could be elements of how their relationship affects the family or how the family reacts to their relationship. And perhaps there are themes of self - discovery as they navigate their relationship and the events around them.
Romance is also quite prevalent. Writers may develop a relationship between Bella and Garrett, exploring how they fall in love, overcome obstacles in their relationship, and grow closer. It could be a slow - burn romance or a more immediate attraction - based one.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of various fanfictions, including bella x garrett ones. Just use the search function on the site to look for it.
Garrett is often depicted as a very adventurous vampire. He has a nomadic nature and loves to explore different places. He's also quite brave, which is shown when he gets involved in various battles or dangerous situations. His sense of freedom is a big part of his character, and this can be very appealing to Bella who has often felt restricted in her own life.
I'm not sure of specific 'bella sister x garrett fanfiction' off the top of my head. But you can try searching on popular fanfiction websites like Archive of Our Own. They have a vast collection of fanfictions, and you might be able to find some by using relevant tags.
Friendship is also a prevalent theme. Bella often forms strong bonds with other characters. In some fanfictions, these friendships help her through difficult times or are the basis for her adventures. They add depth to the story and show different aspects of Bella's personality.
Another theme is adventure. Many fanfictions will put them in situations where they have to embark on a journey together. This could be to find a solution to a problem in the vampire community or to protect someone they care about. It gives a chance for their characters to develop and for their relationship to grow stronger in the face of challenges.
One possible plot could be that Bella and Garrett meet in an unexpected situation, like in a forest during a storm. They initially have some misunderstandings but as they start to communicate, they realize they have a deep connection. Maybe they discover they share a common goal, like protecting the forest from some dark magic. And as they face challenges together, their bond as mates grows stronger.