In some fanfictions, there might be new characters introduced who are also involved in the world of animal communication. Maybe a young witch or wizard from a different part of the wizarding world who has a special connection to a particular type of animal and teams up with Harry to explore the full potential of his ability to talk to animals.
Hedwig is likely to be one of the main animal characters. She was Harry's owl and had a big role in the original series, so in the fanfiction she might have even more expanded storylines. Buckbeak the hippogriff could also be a main character. He was already quite important in the books and could have new adventures in the fanfiction.
Well, in 'rwby the talk fanfiction', you would expect Ruby Rose to be a main character. She's the protagonist of the RWBY series and is likely to be involved in important talks. Weiss Schnee, with her complex family background, would also be a key character in these conversations. Blake Belladonna, given her past and her role in the team, is sure to be there too. And Yang Xiao Long, Ruby's sister, would also play a major part as she has her own story arcs that could be explored through dialogue.
The main characters are obviously Harry and Teddy. Harry Potter, the famous wizard who defeated Voldemort, and Teddy Lupin, the son of Remus Lupin and Nymphadora Tonks. Harry is likely in a mentoring role here, while Teddy is the recipient of whatever knowledge or advice Harry is giving.
Hermione is often involved. She would be curious about Harry's new ability and might try to research more about it in the library. She could also help Harry figure out how to use this ability to their advantage in different situations.
Obviously, Ginny is one of the main characters. Since the title is about her getting 'the talk'.
One interesting 'Harry Animal Talk Fanfiction' could be about Harry learning to communicate with magical animals in the Forbidden Forest to solve a mystery. Maybe he discovers a hidden threat to Hogwarts through the animals' tales.
It could be Dumbledore. He's always been like a mentor to Harry, so it would make sense for him to be the one to give an important talk, whether it's about Harry's destiny or how to handle the challenges in the wizarding world.
It's not just about Tony and Peter though. There could be mentions of other characters in the Marvel universe as well. For instance, Tony might bring up Steve Rogers to give Peter an example of a different kind of hero. Or he could talk about Pepper Potts to give Peter some perspective on how normal relationships can work even in the midst of all the superhero chaos.
Lupin could be a likely candidate. Given his experience and his role as a sort of mentor figure to Harry, he could give Harry the talk. It might involve Lupin sharing his own experiences with being a werewolf and how to deal with secrets and prejudices in the wizarding world.
In 'the animal story', the main characters could be some small insects such as ants. The story might focus on how they work together in a colony, their division of labor, and how they face threats from other creatures. It could also be a story about a single large animal like an elephant, and its journey through the African savannah.