His parents' death also contributed to his loneliness. Growing up without them, he didn't have that family support and love that most kids had. He had to fend for himself and deal with his feelings of abandonment all alone. And in the fanfiction, perhaps his friends are too busy with their own missions or problems, leaving him feeling isolated.
In the fanfiction, Naruto might feel lonely because he has a unique power that no one else can truly understand. He is constantly in a struggle to control the Nine - Tails' power and the burden of it makes him feel like he is on his own journey. Others may try to help, but they can't fully grasp what he's going through.
He might focus on his training. By pouring his energy into getting stronger, he can distract himself from his lonely feelings. Naruto has always been determined, and training gives him a sense of purpose.
The fanfiction could explore Naruto's loneliness by depicting his isolation during his training. He often has to endure difficult and solitary training sessions. This physical and mental isolation can emphasize his loneliness. Also, in some fanfictions, his loneliness might be shown when he faces discrimination from the villagers. Despite his efforts to be friendly and gain acceptance, there are still those who shun him, which deepens his sense of being alone.
In many fanfictions, Naruto might start by training harder. He throws himself into his ninja training as a way to distract himself from the loneliness. It gives him a sense of purpose and also helps him become stronger.
In fanfiction, Naruto could feel sick due to overusing his chakra. He often pushes himself to the limit in battles and training, and this excessive chakra use might take a toll on his body, making him feel ill.
One reason could be his status as a jinchuriki. People might be afraid of him because of the Nine - Tails inside him, so he feels unloved. Another reason is that he was an orphan, and without his parents around, he may have felt like he didn't have that family love that others had.
One possible reason could be that he has been through so much trauma that he has numbed himself. For example, all the losses he has endured during his battles and in his personal life might have made him build a wall around his emotions.
Well, in fanfiction about Naruto's loneliness, one aspect that's often explored is his relationships. His loneliness makes him form bonds in a different way. For example, his relationship with Sasuke. In some fanfictions, Naruto's loneliness drives him to be overly attached to Sasuke as he sees Sasuke as someone who could truly understand him. Also, the way his loneliness is depicted can vary. Some fanfictions show it as a dark cloud constantly over him, while others show him slowly emerging from it as he grows and matures.
One common theme is self - discovery. Naruto's loneliness often makes him look inward and try to understand himself better. Another is the search for family. Since he lost his parents at a young age, his loneliness in the fanfiction can drive him to seek a sense of family, whether it's with his friends who become like family or through finding out more about his own heritage. Also, the theme of acceptance is common. His loneliness stems from not being fully accepted in the village, so fanfictions may focus on his journey towards total acceptance.
Often, Naruto's loneliness in fanfiction is shown through his solitary moments. He might be sitting alone on the Hokage Rock, looking over the village that doesn't fully accept him. It's a visual way to represent his isolation.
There might be a fanfiction where Naruto, feeling lonely after a difficult mission, stumbles upon a violin in an abandoned building. He has no idea how to play it at first, but as he experiments, he creates a unique sound. This sound somehow reaches out to the spirits of the past ninjas who also had their bouts of loneliness. They guide him in playing the violin, and through this, Naruto not only overcomes his loneliness but also gains new wisdom from the past.