Another ability Naruto could develop is enhanced stealth. Itachi is known for his stealth and ability to move undetected. During the three - year training, Itachi could teach Naruto how to move more quietly, hide his chakra signature better, and approach opponents without being noticed. This would give Naruto an edge in combat, especially when facing more powerful opponents where a surprise attack could be crucial.
In this fanfiction, Naruto might gain some unique jutsu skills from Itachi. Itachi is a very powerful shinobi, so he could teach Naruto advanced techniques of chakra control and some secret Uchiha clan jutsu.
One possible plotline could be Itachi teaching Naruto advanced jutsu techniques. For example, Itachi might show Naruto how to use his chakra more efficiently in combat, which could give Naruto an edge against stronger opponents. Another plotline could involve Itachi sharing some of the secrets of the Uchiha clan with Naruto, like the true nature of the Sharingan. This could lead to Naruto developing new strategies that combine his own abilities with what he's learned from Itachi.
Naruto would gain the ability to copy jutsu. With the Sharingan, he could watch an opponent's movements closely and replicate their techniques. This would be a huge advantage for him in battles.
At first, it's likely to be very awkward. Naruto is a very open and energetic person, while Itachi is more reserved. But as they are forced to spend time together because of the arranged marriage, they start to find common ground. For instance, they both care deeply about protecting the village in their own ways.
Itachi would be very strict in Naruto's training, but also very caring. Naruto would look up to Itachi and try to learn as much as he can from him. As Naruto grows, he might start to have his own ideas which could sometimes clash with Itachi's. But through communication and understanding, their relationship would become deeper. Itachi would share his past experiences with Naruto, which would make Naruto understand the complexity of the ninja world better, and in return, Naruto's innocent and determined nature would slowly change Itachi, making him more hopeful about the future of the ninja world.
By having Hashirama train Naruto, Naruto could learn patience. Hashirama, being from an older generation, would have a different pace of teaching and Naruto would need to adapt, thus growing in patience.
Sasuke is often a supporting character. Since Itachi is Sasuke's brother, Sasuke's presence can add a layer of family drama and motivation for both Itachi and Naruto. Kakashi could also be a supporting character. He has a connection to both Naruto and has knowledge about Itachi, so he can play a role in facilitating the training or providing additional advice.
They could develop a mentor - mentee relationship. Itachi, with his vast knowledge and skills, could guide Naruto. Naruto, in turn, could show Itachi his unwavering spirit, which might even inspire Itachi in some ways.
His understanding of the Uchiha and the darker side of the ninja world would deepen. Itachi would share his experiences, and Naruto would gain a more nuanced view. This might make him more empathetic towards enemies. Also, his combat skills would diversify. He could incorporate Itachi - like precision and speed into his fighting style, becoming a more well - rounded ninja.
Through intense battles on the battleship. In the heat of combat, Naruto might discover that he can use his Nine - Tails chakra in a new way to boost the power of the battleship's engines or shields, which is a new ability born out of necessity.