One possible plot development could be that they initially keep their relationship a secret due to their different positions or the rules within their world. Then, as they grow closer, they face challenges together, like dealing with enemies who might try to use their relationship against them.
Well, in a fanfiction with such a relationship, they might start by having a series of unexpected encounters that gradually lead to a mutual understanding and attraction. Their relationship could then cause a stir in their community, with some supporting them and others being against it. They would have to fight for their relationship while also dealing with their own personal growth and the threats to their world.
In this type of fanfiction, perhaps their relationship begins in a rather unassuming way. Maybe Ichigo is injured and Unohana tends to him, and during the process, they discover a deeper connection. As their relationship progresses, they might have to navigate through the complex politics and power dynamics of their world. They could also go on adventures together, learning more about each other's pasts and secrets, and their relationship could be a catalyst for change in the overall story, bringing about new alliances or rivalries within the fanfiction world.
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.
In a more complex way, their relationship could be one of growth. Unohana's calm and collected nature could influence Ichigo to be more patient. At the same time, Ichigo's bold and fearless attitude could inspire Unohana to be more adventurous in her approach to things. This mutual influence could lead to a deep and meaningful relationship that evolves as they face different challenges together in the fanfiction.
For Ichigo, he could develop a more nuanced view of the Arrancars. Through his interactions with Halibel, he might realize that not all Arrancars are pure evil. This could make him more open - minded in his future encounters with other Hollows. As for Halibel, she could start to see the value in the Shinigami way, especially Ichigo's sense of justice. It might make her question her own loyalties and purpose.
In the fanfiction, Ichigo could develop a new level of confidence in his abilities. Kukaku's unwavering belief in his potential could inspire him. Kukaku could experience a change in her own goals. Maybe after seeing Ichigo's selfless acts, she decides to focus more on helping others rather than just her own family's affairs. Their relationship could also lead to a mutual growth in their spiritual powers as they support and learn from each other.
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.
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.
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.
Muramasa could develop a softer side. Usually seen as a rather cold and mysterious figure, through his interactions with Ichigo, who is full of passion and determination, he might start to show more emotions. He could become more empathetic towards others, especially those who are fighting for a just cause like Ichigo.
A possible plot development could be Ichigo being made to fight against his former allies. Under the brainwashing, he might believe that his friends are actually his enemies. Another development could be Xcution trying to extract Ichigo's power while he's in this brainwashed state.
In an 'Aizen hypnotizes Ichigo' fanfic, the plot could start with Aizen having some grand scheme that requires Ichigo's cooperation, which he obtains through hypnosis. Ichigo might be made to believe that he is on Aizen's side and is working towards a 'greater good'. Meanwhile, characters like Rukia or Urahara could suspect something is wrong with Ichigo. As the story progresses, there could be a series of battles and mind - games as the good guys try to rescue Ichigo from Aizen's control. There could also be some exploration of the nature of hypnosis in the Bleach universe and how it affects Ichigo's psyche.