Fanfiction about Ichigo and Unohana time travel: What could be the plot twists?

In the fanfic, it could be that there is a mysterious force threatening the Soul Society. Ichigo and Unohana team up to investigate. Along the way, they discover secrets about each other's pasts. Unohana's past as a fearsome warrior is revealed to Ichigo, and Ichigo's insecurities and determination are exposed to Unohana. Their relationship evolves as they work towards defeating the threat.

One possible plot could be that Ichigo, after all his battles and growth, realizes his deep connection with Unohana. They start off as comrades who respect each other's strength. As they spend more time together, they discover their shared values and interests. Maybe Ichigo is drawn to Unohana's calm and collected nature, and Unohana sees in Ichigo a new kind of strength. Their relationship could develop slowly, with small moments of kindness and understanding leading to a deeper love. Eventually, they decide to get married, much to the surprise and joy of their friends in the Soul Society and the human world.

A really cool plot twist would be if during their time travel, they find out that time itself is a sentient being or is being controlled by an unknown force. This force has been manipulating events in the Soul Society and the human world all along. Ichigo and Urahara then have to figure out how to deal with this new discovery, whether to fight it or try to negotiate, while also trying to find their way back to their own time.

One possible plot could be that they are in a secret relationship. Unohana discovers she's pregnant and is initially worried about how it will affect her role in the Soul Society. Ichigo, on the other hand, is determined to support her no matter what. They then face challenges from the Soul Society's rules and traditions.

One possible plot twist could be that Ichigo travels back in time and accidentally changes something that makes him not become a Soul Reaper in the first place. This would completely change his destiny and the future of the Soul Society. Another could be that he travels to a time when an ancient evil was first sealed away, and his presence there somehow weakens the seal, leading to a new threat emerging in his present time.

Ichigo's power might be enhanced or changed. For example, if they travel to a time when the Hollow and Soul Reaper powers were more intertwined, he could gain a new form or ability. His Zanpakuto might also have different properties. Unohana's healing powers could be affected too. She might find that in some past or future time, her healing abilities are either more potent or restricted, depending on the state of the Soul Society at that time.

One possible plot twist could be that Ichigo struggles to control the Sharingan at first. Since he's not from the Naruto universe originally, the sudden addition of the Sharingan's powers might be overwhelming. He might accidentally activate it during battles in the Bleach world and it could give him an edge in seeing his opponents' moves more clearly, but also make him a target as it's an unknown power in his world.

Maybe in the fanfiction, there's a threat that only Ichigo and Unohana can face together. They have to combine their different fighting styles, with Ichigo's brute strength and Unohana's precise and deadly techniques, to overcome the enemy. For example, they might encounter a powerful Hollow that has the ability to nullify most spiritual attacks, so they need to rely on their physical combat skills and teamwork.

One possibility could be that Ichigo is betrayed by a close friend during his time - traveling adventures. Maybe this friend is jealous of Ichigo's powers or has been influenced by an enemy. This betrayal could lead Ichigo to question his relationships and his purpose in the time - traveling journey. He might then have to find a way to overcome this betrayal and still fulfill whatever mission he has in the different time periods.

Perhaps a story where Ichigo and Unohana are on a joint mission. They are forced to rely on each other's skills. Unohana's calm and calculating nature could complement Ichigo's more impulsive fighting style. They might face a powerful enemy that requires both of their powers combined to defeat, leading to a deeper understanding and respect between them.