In a fanfic where Naruto uses the Force, his development would be interesting. He might start to use the Force to better understand his opponents. For example, he could use it to predict their moves, similar to his ability to sense chakra. His ninjutsu training could be combined with the Force training. Maybe he'd learn to levitate himself or objects using the Force, which would add a new dimension to his combat style. And his understanding of the world around him would change as he discovers the power of the Force.
His character would become more complex. He might start as a naive user of the dark side, thinking he can control it. But as time goes on, it would make him more brooding and solitary. His once bright and optimistic view of the world would be clouded.
He might develop a more complex view of the world. With two bijuu, he'd be in the center of a lot more attention, both good and bad. This would make him more aware of the politics between villages. He'd also have to learn to handle different types of chakra, which could lead to new techniques and a deeper understanding of ninjutsu in general. His relationships with his friends could also change. Some might be in awe of his new power, while others might be worried about him getting corrupted by it.
It would make him more versatile. He's known for his Rasengan, but using the Chidori would show that he can adapt other powerful techniques. This could make him seem more of a prodigy, as the Chidori is a difficult technique.
Naruto would likely become more studious. Instead of just relying on his natural energy and willpower, he'd have to spend time in labs and studying books. His impulsiveness might decrease as he learns the importance of precision in scientific work.
He could develop a sense of self - doubt. Maybe the process of using Chibaku Tensei makes him question if he's becoming too powerful and if he's still the same Naruto. He might worry that his friends will start to see him differently, as someone who wields such a terrifying ability. This could lead to some internal struggles within his character as he tries to balance his new power with his old self.
His character would become more complex. He might struggle with the power of the force, just as he did with his own growing ninja powers. The temptation of the dark side of the force could be a new internal conflict for him.
In this scenario, Naruto would experience a significant shift in his character. He would be forced to make tough decisions. For example, he would have to choose between the village's rules and his loyalty to the fem Kyuubi. This would make him more mature. His relationship with the fem Kyuubi would also bring out a more protective side of him. He would have to learn how to control the power she represents in a new way. Additionally, being outside the village would expose him to different cultures and ways of life, which would shape his beliefs and values. All these factors combined would transform Naruto into a very different kind of shinobi compared to the one we know in the original series.
His character development would be multi - faceted. Initially, Naruto would likely be excited about the new power of Force Lightning. However, as he uses it more, he might realize the moral implications. In the Naruto world, they have their own set of ethics regarding power use. Force Lightning, being a foreign concept, might make him question what is acceptable in combat. He would also have to deal with the jealousy of some of his peers. This could either make him more humble or more determined to prove that the power doesn't change who he is. As he continues to develop, he might find ways to combine Force Lightning with his existing jutsu, creating a unique fighting style that is a blend of his old self and this new power - influenced self.
His character would be shaped by the need for self - preservation. He may learn to hide his emotions better. Maybe he would become more perceptive of people's true intentions. He would grow to be more cautious in his interactions. Over time, as he endures the abuse, he could start to question the world around him and why people are so cruel. This internal struggle could lead to a more complex and mature Naruto, who still retains his core values of friendship and hope.
Naruto's character would likely become more reserved and stealthy. He'd be used to operating in the shadows, which is a big change from his normally boisterous self. His sense of justice might also be refined, as the ANBU has a different view on protecting the village.