Some characters might be amused. For example, Ichigo might find it interesting to see how fans imagine his adventures in different ways. He could chuckle at some of the more out - there scenarios.
Rukia would probably be very critical at first. Since she is quite serious, she might nitpick the inaccuracies in the fanfiction. But she might also secretly enjoy the ones that show her in a positive light, like those highlighting her friendship with Ichigo. In the Bleach universe, characters are used to their own stories, and fanfiction would be a whole new and unexpected take on their lives. The zanpakuto spirits might also have interesting reactions if they could read, as they have their own personalities and might be offended or flattered by how they are depicted in the fanfictions.
Rukia Kuchiki is a very popular choice. She is one of the main characters in Bleach and has a strong personality. Her relationship with the male reader in fanfiction can range from friendship to romance, given her complex character and the various storylines that can be created around her.
For the Soul Society, if the captains read fanfiction, it might disrupt their normal order. For instance, Byakuya might read a fanfiction that portrays his family in a different way. This could make him question some of his long - held beliefs about his clan. And if enough characters start believing in the fanfiction - inspired ideas, it could completely change the power dynamics and relationships in the Bleach world. The Quincy might also get involved if they notice the characters in Soul Society acting differently due to the influence of fanfiction.
Ichigo might gain new perspectives on his own power. If the fanfiction shows him in situations where he has to overcome even greater challenges, he could start to think about his own limits differently and maybe strive to be even stronger.
Naruto would probably befriend Ichigo right away. They both have a strong sense of justice and a desire to protect their friends. Sasuke, on the other hand, might be more aloof at first. He could be intrigued by Urahara Kisuke's mysterious nature. Naruto would likely get along well with Orihime too, as she has a kind heart. Sasuke might have a more competitive relationship with Byakuya, seeing his power and discipline.
Ichigo is one of the main characters. He's a human who becomes a Soul Reaper. Rukia is also important. She's the Soul Reaper who gives Ichigo his powers.
I don't know specifically. But usually in Bleach novels, new characters are introduced to bring fresh storylines. They could be new Soul Reapers, Hollows, or even something from a different realm in the Bleach universe.
Most likely, Ichigo Kurosaki would be one of the main characters. He is the central figure in the 'Bleach' franchise. Rukia Kuchiki might also be a main character as she is crucial to the story's start in the original series.