Their relationship can be developed through shared goals. For example, if they both aim to protect a certain village or person, they'll work together more closely, learning about each other's motives and values.
Dialogue is key. Have them have deep conversations about their past traumas, like Naruto's loneliness as a child and Sasuke's thirst for revenge. By opening up, they can understand each other better and form a stronger connection. Another aspect could be physical challenges. If they are in a life - or - death situation together, they'll realize how much they depend on each other, which can enhance their relationship. For instance, if they are trapped in a collapsing cave and have to use their combined skills to escape, that would be a great opportunity for relationship development.
Their relationship can be developed through shared experiences. For example, if they are both part of a team on a mission, they will have to rely on each other. Naruto's strength and Koharu's intelligence can complement each other, leading to mutual respect and a deeper connection.
Their relationship can be developed through shared challenges. For example, if they are both caught in a dangerous trap set by an enemy. They have to use their combined strength and wits to escape. This kind of situation can make them see each other in a new light and bring them closer.
One idea could be Naruto and Sasuke going on a joint mission in a new, mysterious land. They face challenges that force them to rely on each other in ways they haven't before, deepening their bond.
They could start training together more often. Through intense training sessions, they would grow closer as they learn from each other's strengths and weaknesses.
Their relationship could develop through Naruto showing Kaguya the beauty of the modern ninja world. He could introduce her to his friends and family, which would gradually make Kaguya see the value in human connection and change her view on the world.
The relationship can be developed through shared missions. When they are on a mission together, they can rely on each other's skills and learn from one another. For example, Naruto's vast combat experience can help Sarada in tough battles, and Sarada's fresh perspective can give Naruto new ideas.
In fanfiction, their relationship can be developed through shared experiences. For example, they could be trapped in a mysterious dimension together. During their time there, they have to rely on each other to survive, which makes them trust one another more.
Another way is through cultural exchanges. Naruto could introduce the Mizukage to some of the unique traditions of the Hidden Leaf, like the Ninja Academy system or the annual Chunin Exams. In return, the Mizukage could share the secrets of the Hidden Mist's special jutsu training. This mutual exchange of knowledge and experiences would bring them closer.
In fanfiction, a crisis situation can be used to develop their relationship. For instance, if the village is under attack and Shizune is in charge of treating the wounded. Naruto could be the one bringing in the injured. In this high - stress environment, they would see different sides of each other. Naruto might see Shizune's calm and efficient side in handling the chaos, and Shizune would see Naruto's selfless dedication to protecting the village. This would bring them closer together.
The relationship can start with Naruto being in awe of Hashirama as a great founder. Then, Hashirama could notice Naruto's strong will. They could start with simple conversations about the village's future.