One common theme could be the relationship between Ichigo and his female Zanpakuto. It might explore a more emotional bond compared to the original. Another theme could be power - related, like how the female Zanpakuto's powers are different and how Ichigo adapts to them.
Yes, there is likely some out there. Fanfiction platforms often have a wide variety of creative takes on characters. You can start by checking popular fanfiction sites like FanFiction.net or Archive of Our Own. Just search for 'ichigo had female zanpakuto' in their search bars.
Power growth is a common theme. Since Ichigo has two zanpakuto, fan fictions often focus on how he becomes more powerful. For example, he might learn new techniques.
One great example could be a fanfiction where Ichigo's female Zanpakuto has a unique backstory. Maybe she was once a powerful spirit who chose Ichigo as her wielder because she saw his potential for great good. Another example might involve the female Zanpakuto having a different form of communication with Ichigo, like through dreams or symbols only he can understand. There are also fanfictions where the female Zanpakuto has her own set of powers that are not fully explored in the original series, and these powers play a crucial role in helping Ichigo during battles.
One idea could be that the female Zanpakuto has a unique personality. For example, she could be sassy and constantly tease Ichigo while also being fiercely protective of him. In the fanfiction, she might have her own backstory, like being created from an ancient power that was sealed away for centuries until Ichigo awakened her.
A common theme is the exploration of their dual natures. Since Ichigo has his own powers and the female hollow ichigo has her unique hollow characteristics, fanfictions often play with how these two different yet connected aspects interact.
The female Zanpakuto could start off as a bit of a mystery to Ichigo. At first, he might not fully understand her power or her intentions. As the fanfiction progresses, she could gradually reveal more about herself, like her past and her true motives for being with Ichigo.
It could be a fanfiction that delves into the power dynamics. Since Ichigo has three zanpakuto, perhaps it shows how his power has increased exponentially. It might also be about the training he had to go through to be able to handle three zanpakuto, and how this changes his role in the Bleach universe.
It could completely change the dynamics of his powers and battles. Maybe a new Zanpakuto would give him unique abilities or force him to adapt his fighting style in unexpected ways.
Perhaps in this fanfiction, Ichigo could cross over to a world where zanpakuto are living beings that can freely interact with their owners outside of their sword forms. His relationship with Zangetsu could take on a whole new dynamic as they explore this new world together.
One interesting concept could be Ichigo having a zanpakuto with entirely different abilities than Tensa Zangetsu. For example, it might have the power to control elements like water, which would change the way he battles. Another concept could be a zanpakuto that has a sentient form that is completely unrecognizable from Zangetsu, with a different personality and set of motives.