Maybe Elrond takes Harry in because he senses great power in him. He then raises Harry in a world full of magic and elves, teaching him skills that are different from what he would learn at Hogwarts.
In this 'elrond adopts baby harry fanfiction', the two most prominent characters are Elrond and Harry. Elrond is a well - known figure in Tolkien's lore, a powerful elf - lord. Harry, on the other hand, is the famous wizard from the Harry Potter series. Other characters could potentially include other elves in Elrond's court, or perhaps even some magical creatures that are part of the world where Elrond resides. They could play important roles in Harry's upbringing, either as friends, mentors or protectors.
Well, Elrond could use his ancient wisdom to train Harry in magic that's different from Hogwarts. Maybe he'd teach Harry about elven magic, which could give Harry an edge in fighting Voldemort. Elrond's knowledge of ancient spells and potions could be a great asset to Harry.
Well, perhaps Harry discovers an orphaned baby in a dangerous situation. He decides to take the baby in out of the kindness of his heart. He then has to learn how to take care of a baby while also dealing with his own wizarding world responsibilities. Maybe he asks his friends like Hermione for advice on baby - care.
Some of the more traditional pure - blood families in the wizarding world might oppose it. They could think that Harry, as a single man, is not fit to raise a child properly. Also, certain members of the Ministry of Magic who are strict about family regulations might be against it at first.
In this fanfiction, Severus might adopt Harry to protect him from the dark forces that are still lurking around. He would use his knowledge of the dark arts and potions to keep Harry safe. He could also introduce Harry to a different side of the wizarding world, one that is more about academic study and self - discovery. For example, he may encourage Harry to study advanced potions at a very young age, which would give Harry an edge in his future magical education.
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.
There might be a fanfiction where baby Aragorn has some sort of special connection with Elrond right from the start. Maybe Aragorn shows signs of his future greatness even as a baby, and Elrond is the first to notice and starts to train him in small ways, like teaching him about nature and the lore of Middle - earth.
You can try fanfiction websites such as Archive of Our Own (AO3). It has a vast collection of fan - created works, and there's a high chance you'll find 'baby Aragorn Elrond fanfiction' there. Just use the search bar and type in relevant keywords.