Ron would also be there. He might start out a bit reluctant, but then get into it. He could be Harry's partner in physical challenges, like having races on broomsticks or wrestling magical creatures in a controlled environment for fitness.
Another possible plot is that Harry, realizing the importance of fitness in his fight against Voldemort, decides to train his body as well as his magic. He might go on adventures in the Forbidden Forest, running from dangerous creatures and climbing trees, which not only improves his fitness but also his survival skills.
I'm not entirely sure specifically what 'harry potter is fit fanfiction' is about without reading it. But generally, it could be a fan - created story where the author imagines Harry Potter in a fit or physically capable state, perhaps in new adventures that show off his strength or fitness in some way.
Harry Hook often fits in as an alternate version or a new character added to the existing Harry Potter universe in fanfiction. He can bring new storylines and interactions.
Well, Harry could marry one of the veelas. Given their beauty and allure, it would add an interesting dynamic to the story. Their relationship could involve Harry having to deal with the jealousy of other wizards and also the cultural differences of the veelas. Or he could marry a descendant of one of the founders of Hogwarts. This would tie in a lot of Hogwarts history into their relationship, and their wedding could be a grand event that unites different factions within the wizarding community who have ties to the founders.
Maybe Dumbledore, if he were still alive in the fanfiction. Dumbledore was highly respected and had a great influence. Knighting Harry would be a way for him to publicly recognize Harry's achievements and heroism on a grand scale.
The concept of Animagus in an Avengers fanfiction could also be used for character development. Suppose an Avenger discovers they have the potential to be an Animagus. This would open up a whole new side of their personality. They would have to learn about magic, which is very different from their usual super - power knowledge. This could lead to interesting interactions with other characters, like Thor, who might be intrigued by this new form of power.
In fanfiction, umbramancy can fit in by being a long - lost or forgotten magic. It could be something that was once used by ancient wizards but lost over time. For example, it might be rediscovered in the Forbidden Forest by a curious student.
Django could be a new student at Hogwarts who has some sort of special ability that comes from his non - magical background. For instance, his skills in marksmanship could translate into a unique form of spell - casting accuracy.