Well, it would be a massive shock to the Naruto universe. Naruto was a key figure in promoting peace and unity. With his death protecting Ino, there could be a resurgence of old rivalries. Ino, on the other hand, would be forever changed. She might struggle with survivor's guilt at first. But over time, she could become a force for good in her own right, using Naruto's memory as a motivation. His death could also inspire other characters to reevaluate their relationships and what they are fighting for.
There could be. Fanfiction is a vast and diverse world where all kinds of crossovers and unusual plotlines can exist. However, considering that Naruto and Bleach are two separate and distinct anime universes, it's not something that would be part of the official storylines. But fans often create unique scenarios, so it's possible that someone has written such a fanfiction, though I haven't come across it myself.
One possible plot could be that Naruto is somehow transported to the Bleach universe. He meets Haku there, and they form a bond. When Haku is in danger from some powerful Bleach - related threats like Hollows or powerful Soul Reapers who misjudge Haku, Naruto steps in to protect him. In the process, Naruto, with his ninja skills but lacking the full understanding of the Bleach world's powers, gets overwhelmed and dies while trying to shield Haku.
One possible plot development could be that Naruto sacrifices himself to save Ino from a powerful enemy. This might lead to a great sense of guilt among the other characters, especially those in Naruto's circle. Ino herself might be forever changed, vowing to carry on Naruto's will in some way. She could become more determined to achieve peace in the ninja world, inspired by Naruto's selfless act.
Tenten would likely be deeply traumatized. Naruto was not only a comrade but also a symbol of hope and strength. His death in protecting her would make her feel guilty. She might start to question her own worthiness of being saved at the cost of Naruto's life.
Sakura would be devastated. She would probably blame herself for Naruto's death since he died protecting her. She might go into a state of deep depression at first, withdrawing from everyone.
It would be a huge shock to the Naruto universe. Konoha would be in a state of chaos. His friends like Sasuke, Sakura, and Kakashi would be devastated. They would likely seek revenge against the Akatsuki. The power balance in the ninja world would also shift. With Naruto gone, the threat of the Nine - Tails being used as a weapon would disappear, but at the same time, the Akatsuki would gain more influence and power, causing other villages to be on high alert.
Sasuke would be deeply affected. He and Naruto had a complex relationship. His first reaction might be shock and then a deep sense of loss. He might feel guilty for not being there to help Naruto. Sakura would be heartbroken. She had always cared for Naruto, and his death would be a huge blow. She might become more determined to protect the village in his memory. And Boruto, Naruto's son, would be devastated. He would probably grow up with a strong sense of purpose to live up to his father's sacrifice and protect the village even better.
In most cases, if Naruto dies in a Bleach fanfiction, it's likely a crossover event. His death could potentially disrupt the balance of power in the Bleach universe. For example, if his death is caused by a powerful Bleach villain, it might send shockwaves through the Soul Society. Shinigamis may start to question their own safety and the security of their realm. Also, his friends from the Naruto world might try to seek revenge in the Bleach universe, leading to all kinds of chaos and new storylines.
If Naruto dies at birth in fanfiction, it would have a huge impact on the story's positive themes. Naruto was a symbol of perseverance and the ability to overcome one's past and hardships. His death would mean that those themes would be lost. Also, the Akatsuki's plans regarding the Nine - Tails would be disrupted. They might turn their attention to other 'jinchuriki' more quickly. And characters like Iruka, who played an important role in Naruto's life, would have a completely different story arc as they would not have Naruto to mentor and befriend.
In this type of fanfiction, Naruto's death while protecting Hinata could be the turning point of the whole story. It could cause a shift in the power dynamics of the village. Hinata, on the other hand, would be deeply affected. She might become more withdrawn at first, but then gradually find the strength within herself. His death could also inspire the younger generation to be more like Naruto, always ready to sacrifice for the ones they love.