A possible plot is that Squad 14 is accused of a crime they didn't commit. Ichigo, as the captain, has to prove their innocence. He'd have to search for evidence, face false witnesses, and battle against those who are determined to see Squad 14 disbanded. This would test his leadership and his loyalty to his squad.
One possibility is that it could focus on Fem Ichigo bringing a new leadership style to Squad 4. Maybe she emphasizes a more empathetic approach to treating the injured. For example, she could be shown spending extra time with patients, listening to their fears and concerns, which in turn boosts the morale of the squad as they see their captain's dedication.
One possibility could be that Female Ichigo brings a new perspective to Squad 4. Since Squad 4 is mainly about healing, she might use her unique skills in a different way. Maybe she combines her combat abilities with her newfound leadership in the medical squad. For example, she could develop new training methods for the members of Squad 4 to better defend themselves while also being efficient healers. This would make Squad 4 not just a place for healing but also a more well - rounded unit in the Soul Society.
Maybe fem Ichigo has a different set of powers compared to Ichigo. In the fanfiction, they could train together to combine their powers in a unique way. For example, her powers might be more focused on defense while Ichigo's are on offense, and they learn to complement each other. This could lead to some interesting character development as they overcome their differences and work towards a common goal.
One idea could be exploring the backstories of the lesser - known members in more detail. For example, showing how they got their powers or what led them to their criminal lives.
Maybe in the fanfiction, Ichigo gets lost in Hueco Mundo and Halibel finds him. Instead of attacking, she decides to help him find his way back. During their journey, they encounter various challenges and secrets about Hueco Mundo are revealed to Ichigo through Halibel. This could lead to a new understanding between the two species they represent.
Well, a possible plot could be that Bambietta loses her memory and Ichigo finds her. He decides to help her recover her memories while protecting her from those who would use her amnesia to their advantage. Or perhaps they meet in a parallel universe where the rules of their powers are different, and they have to figure out how to work together to get back to their own universes. Also, a story where they are both given a quest by a mysterious entity, and in the process, they learn more about each other's pasts and motives.
One idea could be that Muramasa and Ichigo are forced to team up against a new and powerful enemy. They start off distrusting each other but as they fight side by side, they come to respect one another's skills.
One plot idea could be Ichigo and Kukaku teaming up to fight a new and powerful Hollow. They could combine their unique abilities, like Ichigo's Zanpakuto skills and Kukaku's fire - based attacks. Another idea is a story where Ichigo has to protect Kukaku from an unknown threat within the Soul Society. Maybe there's a conspiracy and they have to uncover the truth together.
Well, perhaps Bella is from a different dimension and her knowledge of that dimension's technology or magic can be used by the Suicide Squad. She could be a key to stopping an inter - dimensional threat that the Squad is facing. Also, Bella might have a connection to one of the Squad members from her past, which creates an interesting dynamic within the group.
One plot idea could be that 7 of 9 and Captain Janeway have to work together on a dangerous mission to save the ship. They start off with a bit of a rocky relationship due to their different outlooks, but as the mission progresses, they learn to respect and rely on each other more. Another could be a story set in an alternate universe where they are friends from the start and have to deal with a new alien threat that only their combined skills can defeat.