The training makes them more confident in their bending. Zuko becomes surer of his place as a firebender, and Katara gains more confidence in her waterbending skills.
For Zuko, the training might change his view on bending. Instead of seeing it as a tool for power or revenge, he starts to see it as a form of art, like the dragons do. This could make his firebending more refined and less aggressive. For Katara, she could become more confident in her abilities. The dragons' power and wisdom might inspire her to be more creative with her waterbending, perhaps finding new ways to heal or attack.
In this fanfiction, they might gain powerful new bending abilities. Zuko could further master his firebending, and Katara could learn unique waterbending techniques from the dragons. Maybe they'd also develop a deeper understanding of each other's cultures and overcome their past differences.
One interesting plot development could be that through training with the dragons, Zuko and Katara start to understand each other's cultures better. As they learn the dragon - inspired bending techniques, they see how Fire Nation and Water Tribe elements can blend in unexpected ways. For example, Zuko might use water - like fluidity in his firebending, inspired by Katara's waterbending style. And Katara could incorporate the intense heat and energy of fire into her ice - making, creating a new form of waterbending that is more powerful.
It would likely become more complex. They would have to rely on each other more as parents. Their love might deepen as they share the experience of raising a child together.
In some fanfictions, Katara might hurt Zuko physically during a fight. For example, if they have a misunderstanding and their elemental powers clash, Katara's waterbending could accidentally strike Zuko and cause him harm.
Their relationship would likely become more intimate and complex. They would have to rely on each other more, sharing a bond that goes beyond their previous friendship or alliance. Zuko would probably become more protective of Katara, and Katara would trust Zuko with her vulnerability during pregnancy.
Their relationship would likely become more intimate on an emotional level. They'd have to rely on each other more. Zuko would be more protective of Katara, and Katara would be more open with Zuko about her feelings and needs during the pregnancy.
They would become more protective of each other. Since they now have a baby together, any threat to one of them would be seen as a threat to their family unit. Zuko might become even more determined to keep Katara safe, and Katara would do the same for Zuko. Their love would grow deeper as they share the joys and challenges of raising a child. They would also have to communicate more effectively, especially when it comes to making decisions about their baby's upbringing.
Some fanfictions explore their role in rebuilding the world after the war. Zuko and Katara could be working together to restore balance between the nations. This kind of fanfiction often shows their leadership skills and how they complement each other.
It also improves Naruto's skills a great deal. He becomes better at combat and using his ninja techniques. For example, his Rasengan might be more powerful or more easily controllable after Iruka's training. Moreover, Naruto's confidence grows under Iruka's guidance. He no longer doubts himself as much and is more willing to take on challenges.