He would be super excited. Zuko would probably be right there on the floor with Izumi, coaxing her to take those first steps. He might hold out a small, shiny object from the Fire Nation as an incentive.
One idea could be Zuko teaching baby Izumi about the Fire Nation's history and culture in a really gentle and fun way. He could show her old Fire Nation artifacts and tell her the stories behind them.
Zuko's complexity makes him so interesting in these fanfictions. He has a troubled past which has shaped him, but he is constantly evolving. His ability to show vulnerability in front of the reader is another great trait. It allows for a deeper emotional connection between him and the reader, as seen in stories where he opens up about his insecurities and fears.
Well, there might be characters from their clan. Since Itachi is from the Uchiha clan, other Uchiha members could play significant roles. They could be elders or other young Uchiha who are involved in the clan's affairs and in turn, affect Itachi and Izumi's story.
Their relationship would likely become more trusting. In marriage, they would have to rely on each other more. For example, Itachi might open up more about his missions and the secrets he has been keeping.
Their relationship could develop through mutual understanding. Naruto's open - hearted nature would help Izumi open up more. Izumi, in turn, would support Naruto in his duties as a village hero. They might start by sharing small things like their favorite foods and gradually move on to deeper conversations about their dreams and fears.
In 'Ozai Hurts Zuko' fanfictions, Zuko develops by facing his inner demons. The harm from Ozai makes him re - evaluate his life. He might become more empathetic towards others who have suffered, and this changes his outlook on the world. He also gains a new sense of self - identity, separate from what his father wanted him to be.
There's a possibility that Zuko would meet his grandfather. His grandfather's actions and decisions might have influenced the path the Fire Nation took towards war. By meeting him, Zuko could try to sway his grandfather's views and change the future of the Fire Nation at its root.
Yes, there are quite a few. You can start by looking on popular fanfic platforms like Archive of Our Own. Just search for 'ajin izumi and nakano' and you'll likely find a variety of stories with different themes and interpretations.