If Naruto and Fuu had children in a fanfiction, their kids' abilities would develop in an interesting way. Naruto's natural talent for making friends and his strong chakra would influence them. They could easily make allies and have a large reserve of chakra. Fuu's stealth and her ability to adapt quickly would also be passed on. So, the children might be able to quickly learn new jutsu and use them effectively in combat situations. They'd grow up learning from two very different but powerful ninja, which would make their abilities diverse and formidable.
The development of their children's abilities would be a complex process. Naruto is a Jinchuriki and has access to the Nine - Tails' chakra, which could potentially be passed down in some form. This might give the children an edge in terms of raw power. Fuu, with her own set of skills, would train them in areas like agility and quick decision - making. As they grow, they'd also be exposed to the rich ninja culture of the Hidden Leaf. They could learn from other ninja there, further enhancing their abilities. Their family environment, filled with stories of Naruto's and Fuu's adventures, would inspire them to constantly improve and develop their own unique set of skills.
Their children's abilities would likely be a blend of Naruto's and Tayuya's skills. Since Naruto has the Nine - Tails' chakra, the kids might have a strong chakra reserve. And from Tayuya, they could inherit some form of musical - based jutsu or a more aggressive combat style. Maybe they could combine Naruto's Rasengan with Tayuya's flute - based attacks to create a unique and powerful technique.
Naruto would initially struggle with the formalities of a political marriage. But as he spends time with Fuu, he would start to adapt. His character would become more refined in terms of handling political matters. He would learn from Fuu's grace and intelligence. Fuu would also change. She might become more assertive, as she has Naruto by her side. She would be more involved in making decisions for the greater good of both villages. Their characters would grow together, with Naruto's boldness and Fuu's tact combining to create a strong leadership duo for their joined communities.
Naruto's personality would likely become more mature. The responsibility of being in an arranged marriage might make him think more about the future. He would still keep his positive and determined side, but now he has someone else to consider. Fuu's personality could soften. She might start to open up more and show her vulnerable side to Naruto. The marriage could be a catalyst for her to become more trusting and less guarded.
In the fanfiction, their relationship could develop in a very passionate way. Since Naruto is a very emotional and energetic character, and Fuu has her own charm. When they decide to have a child, they would be super excited about the future. However, they would also face difficulties like any couple. There might be times when Naruto's duties as a ninja conflict with his family life, and Fuu would have to be understanding. And vice versa. Through these ups and downs, their love for each other and their child would keep their relationship strong.
If we consider a more romantic relationship, it could develop slowly. Fuu could be the one to first show kindness to Dark Naruto when everyone else is afraid of him. This kindness would be a new experience for him, and he would start to open up to her. As time passes, their feelings for each other would grow deeper, and they would support each other through all the difficulties they face in the ninja world.
Their love could develop slowly. At first, they might just be comrades. But as they spend more time together, they start to notice little things about each other. For example, Naruto might notice how Fuu's eyes light up when she's excited about something, and Fuu might notice Naruto's determination in tough situations. These small observations could lead to a deeper emotional connection over time.
Naruto's Rinnegan might allow him to sense Fuu's presence from afar, and Fuu's agility could be enhanced by the Rinnegan's power. For example, if they are in a battle, Naruto could use his Rinnegan to mark the enemies, and Fuu could quickly dart between them, taking them out one by one.
His physical abilities would likely improve a great deal. Black Widow is a master of martial arts, so Naruto could become even more formidable in close - quarter combat. His agility and strength could be enhanced beyond what he achieved in the ninja world just through her training methods.
Naruto would likely develop his chakra control better. The toads could teach him unique ways to manage his chakra, like using it in harmony with the natural energy around him. This would make his Rasengan and other jutsu more powerful.
His abilities would likely take a very different turn. Orochimaru could introduce him to some dark and powerful chakra - based techniques. Naruto might learn to manipulate his chakra in more insidious ways, perhaps using it to control others or for stealth attacks.