In fanfiction, Ozai's actions towards Zuko can be extremely cruel. Ozai has often been depicted as an abusive father. He burned Zuko's face, which is a very traumatic event for Zuko. In fanfiction, this relationship might be explored further, showing Zuko's struggle to overcome the psychological and physical harm caused by his father.
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 could be themes of forgiveness. Zuko might have to grapple with whether to forgive Ozai for all the harm he has caused, given Ozai's new - found love. Also, a theme of self - discovery for both of them. Ozai's love could make Zuko re - evaluate his own identity and place in the family, and vice versa for Ozai.
Yes, there might be some. You can start by checking popular fanfiction websites like Archive of Our Own. Just search for 'ozai loves zuko' in the search bar, and it'll show you relevant stories. However, this is a rather unusual pairing in the Avatar universe, so the number of fics might be limited compared to more common pairings.
One common theme is the power dynamic. Ozai is a powerful figure in the Fire Nation, and how he wields that power over his baby son, Zuko, is often explored. For example, in many fanfictions, he starts to instill in Zuko the importance of strength and power from a very early age.
There's also 'Baby Zuko's First Years'. In this fanfiction, it focuses on the early days of Zuko's life with Ozai in the Fire Nation. It explores the different ways Ozai might have interacted with his son during those formative years, like his attempts to mold Zuko into a powerful heir from a very young age.
The aftermath could be Minato's quest for revenge if Naruto's death was caused by someone. He would use his skills and knowledge to track down those responsible. Or, he could be plunged into a deep depression. He might isolate himself from the other spirits or entities in the afterlife. His whole existence could become centered around his grief and his memories of Naruto.
It might be Iruka - sensei. Iruka was one of the first people to recognize Naruto for who he was and give him a sense of belonging. If Iruka were to die, Naruto would remember all those early days of support and kindness. His death would break Naruto's heart as it would be like losing a part of his family, the family that accepted him when no one else did.
One possible plot could be that Naruto witnesses the death of a fellow ninja from his village during a battle. Maybe it's someone he has trained with or has a friendly rivalry. This would cause him to cry as he feels a deep sense of loss for his comrade and also blames himself for not being able to protect them.