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.
It could be a relationship of mutual admiration. Naruto has always been in awe of powerful ninjas, and Itachi is one of the strongest. Itachi, on the other hand, might admire Naruto's determination and ability to keep going in the face of adversity. This mutual admiration could be the foundation of their relationship in the fanfiction.
A friendship might form. Despite their differences in age and background, they could bond over their shared experiences during the graduation process. For instance, they might have to face a common enemy or overcome a difficult task together, which would bring them closer.
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.
Their relationship could be developed through a series of flashbacks. For instance, Itachi could recall moments from Naruto's childhood that he observed while in the ANBU. These memories could make him see Naruto in a new light. Meanwhile, Naruto could learn about Itachi's past and the sacrifices he made. This exchange of knowledge could build a bond between them based on empathy and respect. In addition, they could train together in secret, with Itachi teaching Naruto some of his ANBU skills, which would also strengthen their relationship.
They could develop a mentor - mentee relationship. Itachi uses his knowledge of the Sharingan to teach Naruto new combat techniques. As they train together, they bond over their shared experiences of loss and their desire to protect the people they care about. Naruto might also help Itachi come to terms with his past actions and find some peace within himself.
Naruto might give Itachi some traditional Konoha food as a gift. Since Itachi has been away from the village for a long time, he might miss the taste of home.
A possible relationship could be one of mutual respect. Sarada would respect Itachi for his skills and his past sacrifices. Itachi, on the other hand, might see Sarada as a symbol of hope for the future of the Uchiha clan. They could share stories about the Uchiha, with Itachi passing on the history and traditions that Sarada might not be fully aware of. This could strengthen their bond and lead to a deeper understanding between them. In the fanfiction, they might also team up to face a common enemy, relying on each other's strengths and abilities, which would further solidify their relationship.
At first, it might be filled with suspicion. Naruto, being the Hokage, would be cautious of Itachi's past actions as an Anbu. But as they start to interact more, Naruto might see the good in Itachi that Sasuke saw. Itachi, on the other hand, would respect Naruto's position as Hokage and his power to bring change. Slowly, they could develop a mutual understanding and respect.
Their relationship could start with hostility. Demon Naruto, in his more primal state, may view Itachi as just another obstacle. But as they face different challenges together, they could develop a grudging respect. For instance, if they are both caught in a trap set by a powerful enemy, they have to rely on each other's skills to escape. This would make them see the value in each other and start to build a relationship based on mutual survival.
Well, it could start with a simple moment of curiosity. Naruto, being the friendly and outgoing kid, might be attracted to baby Itachi's calm and somewhat mysterious presence. They could start by sharing simple things like toys or food. As time goes on, Naruto's determination and positive attitude could inspire Itachi, and Itachi's intelligence and calmness could influence Naruto in return.
Itachi might initially be distant, but as he sees the potential in baby Naruto, he could start to leave behind teachings in the form of symbols or small jutsu demonstrations that only Naruto can find or understand. Over time, Naruto would grow to respect this mysterious figure that has been guiding him, and Itachi would come to see Naruto as a hope for the future of the ninja world. This would lead to a relationship based on mutual respect and an unspoken understanding.