Fem Naruto could become more power - hungry. Since Kaguya had so much power and was constantly seeking more control, Fem Naruto might start to show similar tendencies. This would be a huge shift from her original self who was always fighting for the good of others and not for personal gain.
She may lose some of her compassion. Naruto was known for her big heart and compassion, but if she becomes like Kaguya, this could be overshadowed. Her focus might shift more towards maintaining her power and position, rather than caring for the little guys like she used to.
She could also inherit Kaguya's sense of isolation. Kaguya was alone for a long time, and if Fem Naruto becomes like her, she might start to distance herself from her friends and loved ones. On the other hand, she might use her new powers to protect them in ways she couldn't before, but at the cost of her own emotional well - being.
Well, Naruto could change Kaguya in the fanfiction by introducing her to the concept of redemption. Given his own journey of facing his inner demons and coming out stronger, he might convince Kaguya that she can atone for her past sins. He may take her on a journey through the ninja world, showing her how people have rebuilt and thrived despite the chaos she once caused. This could make her re - evaluate her actions and change her perspective on the world and her place in it.
His power level would skyrocket. Naruto already had the power of the Kyuubi within him, but as a kitsune, he'd have a more direct connection to that power. He could access it more easily and use it in ways he couldn't before. For instance, he might be able to transform into a full - kitsune form with ease, and in that form, his speed, strength, and durability would be greatly enhanced.
Naruto's character would change in several ways. Firstly, he would become more strategic. As a lord, he has to plan for the long - term development of his land, which requires thinking ahead. His impulsiveness would be curbed as he has to deal with the complex web of politics. He would also grow in terms of wisdom. He would learn from his experiences and the advice of his advisors. His charisma would be used in a different way. Instead of just inspiring his ninja comrades, he would need to inspire all his people. His sense of justice would expand from individual cases to the overall fairness of his domain, and he would strive to make his territory a model of a just society.
He becomes more serious. Gone is the Naruto who is always cracking jokes.
His character would become more menacing. The Vasto Lorde transformation might bring out a darker side of Naruto.
He becomes cold towards others. He no longer shows the warm smiles and friendly greetings that he used to. Instead, he might ignore people or give them cold stares.
Naruto's character may become more adaptable. Since he has to deal with being a slime, he'll need to quickly adjust to a completely different form and way of life. He might lose some of his brashness as he realizes he can't just charge into situations like he did as a ninja.
The story changes a great deal. Naruto becomes a sort of living prison for Kaguya's power. His relationships might be strained as people fear what he could become. The Hidden Villages might keep a closer eye on him.
Naruto might become more withdrawn like Gaara was initially. Gaara was isolated due to his power and the fear others had of him. So Naruto could start to keep to himself more, losing some of his boisterous and friendly nature.