Naruto might become bitter. After being alone, he could start to question all the values he once held. He may think that his efforts to protect and connect with others were in vain, which could lead to a cynical view of the world.
Well, the storyline could change in many ways. For example, if Naruto goes back in time, he might prevent some of the tragedies that happened in the original story. He could stop the Uchiha massacre, which would completely change Sasuke's story arc. Also, he might be able to train with the earlier versions of his teachers and learn new jutsu much earlier, making him even more powerful in the future timeline.
He becomes more solitary. Without the pursuit of love, Naruto focuses more on self - improvement and his ninja skills. He might seem more aloof as he distances himself from the idea of a relationship. For instance, he spends more time training alone in the forest.
It changes him by making him more unpredictable. Normally, Naruto is very determined and straightforward. But as the Joker, he becomes someone who thrives on chaos. He might not have a clear goal like he did before, but rather just enjoys causing disruptions.
He would likely become more cynical. Naruto is usually so full of hope and belief in the good of people, but giving up on his family would make him question his own values. He might start to view relationships as more fragile and be less trusting in general.
One possible scenario could be that all of Naruto's friends are killed in a great battle. He survives but is left alone, haunted by the memories of his lost comrades. He might then wander the world, a solitary figure, with his only company being the memories of the past.
In these fanfictions, Naruto's character experiences a significant shift. Firstly, his sense of adventure takes on a new form in the SAO world. He is no longer just exploring the hidden villages and fighting ninjas but is now delving into the digital landscapes of SAO. When it comes to the harem, his usually brash and straightforward personality mellows a bit. He has to be more delicate in handling the emotions of the female characters in his harem. This makes him more patient and understanding. He also starts to rely more on his wits in the SAO world rather than just brute strength as he has to figure out the virtual world's mechanics. His loyalty also extends to his new friends and potential love interests in the SAO harem, which is an expansion of his already strong sense of loyalty from the Naruto series.
Naruto's confidence also takes a different turn. He is no longer just relying on his regular jutsu. With Meiton, he has a new sense of power, but also new responsibilities. He might be more cautious in battles, knowing that his Meiton attacks could have far - reaching consequences. In some fanfictions, this makes him seem more mature as he weighs his actions more carefully.
Naruto might become more reserved. Since ice is often associated with coldness, he may not be as outgoing as in the original story. He could be more cautious about showing his emotions.
Well, in this fanfiction, Naruto's self - confidence could take a different turn. Being born as a kitsune gives him a special identity from the start. He might not have the same insecurities as in the original story. Instead, he could be more self - assured, knowing he has unique powers. However, he might also face new challenges in controlling his kitsune powers, which could lead to some internal struggles as he tries to balance his new abilities with his old values.
With foresight, Naruto becomes more cautious. He can't just rush into things as he used to. For example, if he foresees a trap, he'll avoid it instead of blindly charging in.