Some characters might be shocked. For example, Ichigo might be surprised by the future battles and the development of his friends. He could see new powers emerging and might start to train harder in the present to face the future challenges.
In 'bleach watch future fanfiction', Ichigo and his friends from the original series like Uryu, Chad, and Orihime are likely to be main characters. Their combined efforts in facing new threats in the future are often a key part of the story. Also, some of the powerful captains from the Soul Society, such as Byakuya, might be important as they deal with the new situations in the future.
One interesting concept could be new character developments. For example, existing characters might gain new powers or face different moral dilemmas. Another could be alternate timelines where events in the original 'Bleach' story took a different turn. This can lead to unique interactions between characters.
Well, some characters might try to change the future they read. For example, Ichigo might see a future where his friends are in danger and immediately start training harder to prevent it. He's always been the type to take action.
The main characters would likely include Ichigo, as he is the protagonist of the original series. He might be facing new challenges in this future scenario. Renji could also be a main character, as his relationship with Rukia and his own growth arc make him an important part of the Bleach universe. And Aizen, even though he was a villain, could play a significant role if the fanfiction explores his possible return or his influence on the future events.
Ichigo might become more cautious. Usually he's quite impulsive, but seeing the future could make him think twice before acting. He doesn't want to mess things up more than they already might be in the future he saw.
The plot could change drastically. If Ichigo knows about future threats, he might take different actions in the present. For instance, he could start seeking out new training methods earlier or form alliances differently.
Kristoff, in the future he watches, might become more refined and diplomatic. If he sees himself as part of the Arendelle court in the future, he would have to learn to interact with nobles and other royalty. He would start to pick up on social graces and political savvy, which would gradually change his rough - around - the - edges personality in the present as he prepares for that future role.
Mostly, it is legal to 'watch' (assuming it's in a form that can be watched like an audio - visual adaptation) Bleach fanfiction. Fanfiction exists in a legal gray area that is generally protected under the concept of fair use. This means that as long as the fan work is not competing with the official Bleach products in the market, and is more of a creative addition by fans for fans, it is legal. But of course, if the fanfiction starts to use copyrighted elements inappropriately or in a way that violates the original creator's rights, then it could cross into illegal territory.
It's hard to say if it's common. There could be many people named 'bleach' out there, but we don't really know how many of them are fans of 'bleach' the series and also engage with fanfiction. It depends on how big the 'bleach' fan community is and how many people with that name happen to be part of it.