If Snape adopts Harry after the war in fanfiction, it could be a chance for Harry to heal. Snape, despite his gruff exterior, might be able to provide a stable home environment for Harry. Harry would be exposed to Snape's vast knowledge of the wizarding world, including dark magic defenses. They might also have some interesting conversations about Hogwarts, the Order of the Phoenix, and Voldemort. Harry could grow into a more well - rounded wizard under Snape's tutelage.
In a fanfiction where Snape adopts Harry after the war, Harry's life would take a very different turn. Snape, being a strict and intelligent wizard, would set high standards for Harry. Harry would have to adapt to Snape's rules and way of life. He would probably study a great deal, especially in areas that Snape was proficient in. This could lead to Harry becoming an even more powerful wizard. Also, their relationship would be a mix of respect and grudging admiration. Snape would see Harry as a continuation of Lily's legacy, and Harry would come to see Snape in a new light, as a mentor rather than an enemy.
In such a fanfiction, one possibility is that Snape would initially struggle with his new role as an adoptive father. He has a complex personality, but over time he might start to show his protective side towards Harry and Hermione. He could teach them advanced magic, especially his own areas of expertise like Potions, in a more personalized way.
In this kind of fanfiction, perhaps Severus Snape and Tom (presumably Voldemort in his Tom Riddle form) would have a very different dynamic with Harry. Maybe they would try to shape Harry's magical abilities in their own ways. Snape might use his knowledge of potions and dark magic to train Harry, while Tom could introduce Harry to some of the more complex and dangerous aspects of magic from a different perspective.
Well, it could be a really interesting story. Snape, being the one to adopt Harry, would have to deal with his own complex feelings towards James Potter while raising Harry. He might initially be strict, but gradually, as he sees Harry's own personality develop, he'd grow to have a very deep and loving bond with him. He could also introduce Harry to a different side of the wizarding world, one that is more influenced by his own Slytherin roots.
In such a fanfiction, Harry might see the potential in young Severus that others overlooked. He could protect Severus from the bullies at Hogwarts. Harry, having experienced his own share of hardships, would understand Severus's situation to some extent and try to give him a better childhood, perhaps even guiding him to use his magic in a more positive way.
At first, it's likely to be tense. Harry has years of seeing Snape as a bully. But as they start living together, they begin to understand each other. Snape might show his more vulnerable side to Harry, like his memories of Harry's mother. Harry, in turn, starts to respect Snape's knowledge and sacrifice. Eventually, they develop a bond like a father - son relationship.
If Snape adopts Harry and Draco, it could change the whole dynamic of Hogwarts. Snape would have to ensure that both boys are getting proper magical education while also taking care of their emotional well - being. Harry might start to see Snape as more than just a teacher who was always tough on him. Draco would be forced to interact with Harry in a more positive way. There could be some really heartwarming moments as Snape tries to show his affection for the two boys in his own, rather gruff way. And perhaps they could all form a strong, if unconventional, family unit.
One possibility is that Snape would be extremely strict with them at first. Given his past relationship with Harry especially, he might struggle to show affection openly. But over time, he could come to understand the trio better. Harry would likely be the most resistant to Snape's parenting at the start, but as Snape showed his genuine care, Harry might warm up. Hermione would probably be eager to learn from Snape, seeing his vast knowledge. Ron, on the other hand, might find Snape's gloomy demeanor a bit off - putting, but with Hermione and Harry's influence, he'd also adapt.
A 'Harry Potter adopts Naruto' fanfiction could see Naruto being amazed by the magic of the wizarding world. He might constantly ask Harry about how everything works. Harry would have to explain things like the Floo Network and thestrals to him. Naruto could also share his stories of the Hidden Leaf Village with Harry and his friends. This could lead to new friendships being formed, like Naruto becoming good friends with Ron and Hermione. And perhaps Naruto would use his shadow clone jutsu to help out during Quidditch matches, either by confusing the opposing team or helping to search for the Snitch.
In a 'Percy Weasley adopts Harry' fanfiction, there could be a lot of interesting family dynamics. Percy would have to deal with Harry's fame, which might be a new experience for him. He could also introduce Harry to a more structured and perhaps stricter way of living compared to what Harry is used to at the Dursleys. Harry might learn a different set of values from Percy, and their relationship could be a mix of mentor - mentee and father - son. Percy could use his influence in the Ministry to protect Harry better as well.
In such a fanfiction, the plot could involve Snape taking on the role of a father figure to Harry and Draco. He might use his knowledge and skills to protect them from the various threats in the wizarding world. Snape could also teach them advanced magic, which they might not learn otherwise in Hogwarts. And there would likely be a lot of emotional growth for both Harry and Draco as they deal with their new family situation and their past traumas.