One idea could be that Uryu, with his Quincy skills, is forced to team up with an Arrancar to fight a common enemy that threatens both their worlds. This could lead to a slow - building trust and friendship between them.
Rukia could be one of the characters in the harem. She has a long - standing relationship with Ichigo and her own strong spiritual powers. Orihime could also be part of it. Her kind - hearted nature and unique abilities would add depth to the harem dynamic. Another potential character could be Neliel. As an arrancar herself, she could have an interesting relationship with arrancar Ichigo.
A big challenge would be trust. Given their backgrounds as former enemies, it would be hard for them to trust each other at first. There could also be cultural differences between them. Ichigo comes from a more human - influenced world in the Soul Society, while Halibel is from the harsh and different world of Hueco Mundo. These cultural differences could lead to misunderstandings and arguments as they try to cooperate. Additionally, there could be external forces trying to keep them apart, like other Arrancars or Soul Reapers who don't want to see them together.
In some fanfictions, the female Arrancar has a special power that Ichigo needs to defeat a new and powerful foe. So, they start to train together. During the training, they grow closer. The female Arrancar might teach Ichigo some unique combat techniques that are specific to the Arrancar, and in return, Ichigo shows her the value of protecting the innocent. This mutual learning experience forms the basis of their relationship in the fanfiction.
Another way is through mutual respect. Ichigo respects the female Arrancar's strength and abilities. He doesn't underestimate her just because she is an Arrancar. The female Arrancar respects Ichigo's determination and his sense of justice. This respect gradually breaks down the barriers between them and allows them to form a relationship in the fanfiction.
A possible plot could involve Ichigo being in a situation where he has to choose between his arrancar nature and his relationships with the harem. His arrancar side might be drawn to power and chaos, but his love for the harem makes him want to stay on a more moral path. This internal struggle could drive the story forward and also affect his relationships within the harem.
No. Harry Potter is set in a world of wizards, witches, Hogwarts, and magic that is very much its own. It has elements like the Philosopher's Stone, the different houses at Hogwarts, and the battle against Voldemort. Arrancar, on the other hand, belong to the Bleach universe with a different set of rules, powers, and a very different kind of supernatural world. So, Harry Potter can't be an Arrancar fanfiction.
One possible fanfiction could involve a crossover between Rosario Vampire and Arrancar. The unique powers and characteristics of both vampires and arrancar could create interesting plotlines. For example, a Rosario Vampire character might encounter an arrancar and initially mistake them for a normal vampire. This could lead to a series of misunderstandings and battles as they figure out each other's true nature.
The original series has a certain pacing and development for their relationship. But in the fanfiction, the Arrancar aspect of Ichigo could speed things up. For example, Arrancar Ichigo might have a more primal, possessive side towards Rukia. This could lead to a more passionate and tumultuous relationship. Also, they would face different external threats and challenges because of Ichigo's new form, which would force them to rely on each other in new ways and thus change how their relationship develops.
Neliel could be a great choice. She has a more gentle and kind nature compared to many other Arrancars. Her unique appearance and backstory would make for an interesting dynamic with Uryu. She could potentially teach Uryu about the different aspects of Arrancar existence that he may not be aware of.