Well, in fanfiction, anything can happen. Just because it says Harry is Uryu's brother doesn't necessarily mean it's going to be a traditional brother relationship. It could be a metaphorical brotherhood, or it could be a result of some crazy plot device like a cross - over between two different universes. So, it really varies from one fanfiction to another.
In this fanfiction, the plot might be that their brotherhood is a key to uniting two different factions. Harry could represent one side and Uryu the other. Their bond as brothers becomes a symbol of hope for the two groups to come together and cooperate. Along the way, they face internal and external challenges, like people who oppose their union and those who want to use their relationship for their own gain. There could also be a sub - plot about them learning about each other's cultures and abilities, which helps them grow as individuals and as brothers.
One key element is their contrasting personalities. Ichigo is hot - headed and impulsive while Uryu is more calm and calculated. This creates an interesting dynamic in the fanfic as they often clash but also learn from each other.
A key element is often their contrasting personalities. Uryu is more reserved and methodical, while Ichigo is impulsive and passionate. Their interactions based on these differences create interesting dynamics.
One great ichigo x uryu fanfic is 'Bond of Souls'. It beautifully explores their relationship as they face a new and powerful enemy together. Their friendship is depicted in a very heartwarming way.
One interesting story could be where Uryu and Orihime go on a magical adventure together. In this fanfiction, they might discover new powers and their relationship deepens as they face challenges side by side. However, it's important to note that lemon fanfiction often contains inappropriate content, so it's better to look for more general and positive stories about them.
One interesting story could be about their unexpected team - up during a new threat in the Soul Society. In this fanfiction, their different abilities complement each other in a unique way, leading to a deeper understanding between them. They start to respect each other's powers more and form a bond that was not as strong in the original series. This new - found bond then becomes the basis for their friendship to grow and face challenges together.
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.
Another plot might involve Uryu being turned into a vampire against his will. Ichigo then has to find a way to either cure him or help him control his new vampiric urges. This would lead to a lot of emotional turmoil and character development for both of them.
There's also 'The Unspoken Bond'. It focuses on the unspoken feelings between Ichigo and Uryu. It shows how their initial rivalry slowly transforms into something more intimate, with beautiful descriptions of their interactions.