In some 'naruto is a father crossover fanfiction', there could be a storyline where Naruto is a father in a crossover with the Harry Potter world. His child could be a student at Hogwarts, and Naruto, with his experience of being a hero, tries to understand the magic world and protect his child from the dark forces. Maybe he uses his chakra in unique ways within the magical environment.
One common theme is the struggle of single parenting. Naruto has to handle all the responsibilities of raising a child alone, like providing for them, protecting them, and teaching them right from wrong. Another theme is the clash of different worlds. Since it's a crossover, there are elements from different anime universes that Naruto has to deal with while raising his child.
In a crossover with the Attack on Titan world, characters like Eren could interact with Naruto. Eren, with his strong will to fight for freedom, could learn from Naruto's experience as a father and a hero. Levi might also be interested in Naruto's combat skills and how he trains his child in the ways of the ninja.
One possibility is that a writer might create a backstory where Naruto's unique chakra or abilities are needed to save Kunou's mother from a great danger. In the process, a bond forms between them and through some unorthodox means, Naruto becomes the father. Another aspect could be that in the fanfiction world, there are new rules and the author wants to explore the combination of Naruto's ninja world elements with the devil - based world of 'Highschool DxD' to make Naruto Kunou's father.
There's also 'Naruto: Single Father in a Fantasy Crossover'. This story focuses on Naruto raising his child in a world full of magic and different races from other animes. He struggles to fit in at first but then uses his determination and the values he learned in the Naruto world to build a good life for his family. It has a great plot that keeps you hooked.
Yes, in the fanfiction 'Naruto Father of Yasha', Naruto is depicted as the father. However, it's important to note that this is a work of fanfiction and not part of the official Naruto storyline.
In most traditional Naruto and Blake storylines, Naruto has no relation to Blake as they belong to different fictional universes (Naruto and RWBY respectively). However, in some very creative fanfictions, an author might create a crossover scenario where Naruto could be made the father of Blake in a completely new and alternate storyline. But this is not a common or canon connection.
A Naruto and Albedo fanfiction crossover could be really interesting. It could start with Naruto somehow ending up in the world where Albedo exists. Maybe he gets there through a strange jutsu gone wrong. Naruto's positive and determined personality could contrast with Albedo's more complex nature. They could team up to face a common enemy, with Naruto's combat skills and Albedo's knowledge of her world combining to create a unique dynamic.
In a Naruto - Skullgirls fanfiction, Sakura could team up with one of the Skullgirls. Sakura's medical ninjutsu combined with the brute force of a Skullgirl character would make a formidable duo. They could go on adventures together, facing off against common enemies. It would also be fun to see how the two different art styles blend in the fanfiction, like Naruto's more traditional anime look with the unique, somewhat gothic style of Skullgirls.
One possible scenario in a Naruto - Kaneki fanfiction could be that Kaneki somehow ends up in the Naruto world. Maybe through a strange portal or some sort of jutsu gone wrong. He might initially struggle to adapt to the different environment and the presence of chakra. But his own unique kagune abilities could be seen as a strange new form of power in the Naruto universe.