Adventure and teamwork is also a theme. Since they are both part of the Soul Society in the Bleach universe, fanfictions sometimes put them on missions together. Through these shared adventures, their relationship deepens, and they rely on each other more, which in turn leads to the development of their romantic relationship.
One common theme is friendship. Given their relationship in the original Bleach series, many fanfics explore the deep bond of friendship between them in different scenarios. Another theme is adventure. They might go on adventures together, facing various challenges.
One common theme is loyalty. Their loyalty to each other, whether it's through thick and thin in the Soul Society. Another theme is growth. They often grow as individuals and as a pair in these fanfics.
Friendship is a very common theme. Hyourinmaru and Hitsugaya have a special bond as a zanpakuto and its wielder. Fanfictions often explore how this bond deepens over time, through shared experiences and challenges. For instance, they might face a difficult enemy together and their friendship becomes stronger as a result.
Another theme is the idea of them being partners in some way, either in battle or in solving problems within the Soul Society or the human world. They might have to rely on each other's strengths and overcome their differences. In many fanfictions, they start off not getting along very well but then gradually develop a deep bond. This is also a very popular theme as it allows for a lot of character development and relationship building throughout the story. It's really interesting to see how they change and grow closer over time.
One aspect of Toshiro Hitsugaya x Momo Hinamori fanfiction is the emotional depth. Since they have a long - standing connection, fanfictions may play with the idea of unspoken feelings. Maybe Hitsugaya has always been secretly protecting Hinamori, and in the fanfiction world, these feelings could be more openly explored. It could also involve Hinamori realizing her true feelings for Hitsugaya after some sort of event that makes her see him in a new light.
One common theme is the discovery of self. As they interact, both Hitsugaya and Karin often learn more about who they are. Another theme is the power of friendship. Their relationship starts as an acquaintance and gradually turns into a deep bond.
The reader was a new recruit in the Soul Reapers' ranks. Toshiro Hitsugaya was assigned to train the reader. At first, he was strict and all business. But as time passed, he noticed the reader's determination and unique spirit. The reader, on the other hand, was in awe of Toshiro's power and his sense of justice. They started having conversations outside of training, sharing their dreams and fears. Their relationship gradually grew into a beautiful love story, filled with mutual respect and admiration.
The fanfic 'Love in the Soul Society' is also quite good. It focuses on the more tender and affectionate aspects of their relationship. It's beautifully written, with vivid descriptions of their interactions and the emotions that run between them.