Love and friendship are also big themes. Some fanfics might develop a romantic relationship between them, showing how they overcome the obstacles in their way. Others might focus on strengthening their friendship, perhaps through some kind of shared adventure or trial that tests their bond.
Another theme is the exploration of their powers in unique situations. For example, some fanfics might have them team up against a new and powerful enemy, and the story focuses on how they combine their abilities to fight. It can be really exciting to see how their different fighting styles work together.
A common theme is their past connection. Given their history in the Soul Society, many fanfictions explore how their past acquaintance and the events that happened between them shape their current and potential future relationships.
You could also join some dedicated Bleach fan forums. Fans often share and discuss their favorite fanfics there. They might be able to point you directly to some great Byakuya Yoruichi fanfics. They could even recommend some that are based on specific story arcs or themes within the Bleach universe.
One common theme is loyalty. Byakuya's loyalty to his family or those he considers family is often explored. Another theme is protection. He is often depicted as a protector in these fanfics.
One common theme is friendship. Despite their differences, they often form a deep bond in fanfics. For example, in many stories, they start off as rivals but gradually become friends who support each other.
I think it might be because the plot wasn't developed in that direction or maybe there were other factors influencing his thoughts that weren't shown clearly.
One common theme is family loyalty. Despite the cold exterior that Byakuya often shows, his loyalty to Rukia as his sister is a central aspect. Another theme is sacrifice. In many of these fanfics, either Byakuya or Rukia is willing to sacrifice for the other's well - being.
One common theme is loyalty. Given their history in the original story, loyalty to each other, whether it's rukia's loyalty to byakuya as her superior or byakuya's loyalty to rukia as someone he cares about deeply, is often explored.
One common theme is loyalty. Byakuya's loyalty to his family, which includes Rukia, is often a driving force in these fics. Another theme is redemption. Byakuya might be redeeming himself for past actions or misunderstandings regarding Rukia.
Love is a very common theme. Their love story, which was complex and filled with sacrifice, is often explored in more depth. Another theme is loss. Since Hisana is no longer alive in the main Bleach storyline, fanfics often deal with Byakuya's sense of loss and how he copes with it.
One common theme is loyalty. Byakuya is bound by his loyalty to the Soul Society and his family, and Rukia has her own sense of loyalty. Their relationship often has to navigate through these loyalties. For example, in many fanfics, Byakuya has to balance his duty to his family's name and his growing feelings for Rukia.