One common theme is the 'forbidden love' aspect. Since Gin and Rukia are from different factions in the Bleach universe, their relationship can be seen as something that goes against the norms. So a lot of fanfictions play on this idea of them having to hide their feelings.
There could also be adventure - themed fanfictions. Gin and Rukia team up to go on some dangerous quests or face powerful enemies together. This not only tests their relationship but also gives an opportunity to show their individual strengths and how they complement each other in combat situations.
Another theme could be 'redemption'. Gin has done some morally ambiguous things in the original story. In fanfiction, his relationship with Rukia might be a path for him to redeem himself, like he starts to change his ways because of his love for her. It's a way to explore his character development in a different light.
One common theme is the exploration of an unlikely relationship. Since they are from different groups in the original story, seeing how they interact and form a bond is popular.
Yes, there are some. You can start by looking on fanfiction.net or Archive of Our Own. Just search for 'rukia x gin' in their search bars and you'll likely find a variety of stories.
One common theme is secrecy. Given their characters, their relationship often involves hidden motives and unspoken words.
Another theme is loyalty. There are stories that show how, despite their differences, both Gin and Matsumoto have a sense of loyalty to their own beliefs or to each other in certain situations. For example, Matsumoto might be loyal to her idea of justice while Gin has his own form of loyalty to his motives, and how these clash or align in the fanfiction.
One common theme is the exploration of their different personalities. Gin is often seen as more sly and unpredictable, while Toshiro is more serious and composed. Fanfictions may play with how these personalities clash or complement each other. Another theme could be loyalty, either in a friendship sense or as comrades in some sort of battle or struggle.
Redemption is also a theme sometimes. Sherry might be written as trying to redeem herself from her past in the organization, and Gin could be a part of that journey in some way. Also, there are fanfictions that focus on the 'what - if' scenarios, like what if they had different roles in the organization or if they had escaped together.
One common theme is friendship. Gin and Hotaru might start as friends and their bond grows deeper over time. Another could be adventure, with them facing challenges together.
The theme of sacrifice is quite common too. Renji may be willing to sacrifice his own well - being or position for Rukia's sake. Also, the theme of self - discovery. Through their relationship, they both discover new aspects of themselves. For instance, Rukia might discover a stronger side of herself because of Renji's support, and Renji might discover his capacity for deep love.
Growth is also a big theme. As they interact more, both rukia and tatsuki grow as individuals. For example, they might become more confident or learn new skills. And sometimes, there's a theme of sacrifice, where one is willing to sacrifice for the other in the story.
Romance can also be a common theme. Writers might imagine a relationship between them, showing how they might fall in love, overcome obstacles together, and build a relationship. Another theme could be adventure, where they go on adventures together and their relationship develops during those experiences.