Ichigo's powers might be enhanced or altered. Since he has a unique combination of Hollow, Shinigami, and Quincy powers, time travel could disrupt the balance. For example, his Hollow side could become more dominant if they travel to a time when Hollows were more powerful. His Zanpakuto might also change in appearance or abilities.
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 idea could be that fem Ichigo is a new recruit in Urahara's shop, and they end up having to go on a secret mission together to save the Soul Society from a new threat. Along the way, a unique bond forms between them.
Friendship turned into a deeper connection might be another theme. In these fanfictions, they often start with a basic acquaintance or friendship and then develop romantic or more complex feelings as the story progresses. Also, themes of self - discovery for both characters can be common as they navigate their new relationship. For example, Ichigo might discover new aspects of his powers or himself through his relationship with Urahara, and vice versa.
One great Ichigo time travel fanfiction is 'A Time - Twisted Adventure'. It takes Ichigo to different points in the Bleach timeline in unexpected ways. The character development is really interesting as he has to adapt to the past or future situations while still holding onto his core values.
Ichigo's character could develop a greater sense of patience. In different time periods, he might have to wait for the right moment to act or to understand the events around him. For example, if he travels to a more primitive time in the Soul Society, things may not happen as quickly as he's used to in his own time. This would force him to be more patient. He could also become more empathetic as he experiences the hardships of different eras and the people in them.
Ichigo might go into a state of self - reflection. He would wonder if there is something he has unknowingly done to cause this. He would try to analyze his past actions during the time travel. He might isolate himself from his so - called betrayers for a while to think things through. But ultimately, he would not give up on his friends. He would strive to find a way to regain their trust and set things right, because he values his relationships with them deeply.
You can try some well - known fanfiction websites like Fanfiction.net or Archive of Our Own. Just search for 'fem Ichigo and Urahara' on their search bars, and you'll likely find a variety of stories.
Well, I read a fanfic called 'Dark Ichigo's Time - Twisted Travels'. In this story, Dark Ichigo travels back to key moments in Ichigo's life and tries to change things for his own dark purposes. It's full of action and some really interesting takes on how the Bleach timeline could be altered. It's definitely worth checking out if you're into this kind of fanfiction.
One great ichigo byakuya time travel fanfiction is 'A Time - Twisted Bond'. It has an interesting plot where Ichigo and Byakuya are sent back in time and have to navigate the past while dealing with their changed relationships. The story is full of action and emotional moments.