Who could be an unexpected ally for Harry in a Harry Potter third task fanfiction?

In some fanfictions, Harry might struggle with PTSD after the third task. The trauma of facing Voldemort again could haunt him, causing nightmares and making him more withdrawn. He might also become more determined to defeat Voldemort, spending all his spare time studying dark magic defenses.

One plot twist could be that the maze reveals different illusions for each contestant based on their deepest fears. For example, Harry could see Voldemort killing his friends instead of the normal obstacles. Another could be that the cup at the end is a fake and leads to a more dangerous trial. Or perhaps one of the other champions teams up with a dark wizard within the maze to try and eliminate Harry.

In the fanfiction, Ally Martin could be an original character created by the author. She might be a witch or wizard with her own set of abilities and personality traits.

Filch could be an unexpected character. He might enter the tournament in a comical way, like he accidentally stumbles into the selection process and ends up being a participant. Another could be Peeves. He could disrupt the tournament in his usual mischievous way, or perhaps he is made a part of a task where the competitors have to outwit him.

It could be Luna Lovegood. She has a unique perspective on magic. In the final battle fanfiction, she might use her strange but effective magical items and her unorthodox thinking to outwit Voldemort. For example, she could use some of her Lovegood family's special magical artifacts to create a shield or a trap for the Dark Lord.

A young dragon tamer from a far - off land could be an interesting addition. This character could have a deep understanding of dragons and offer Harry some advice on how to approach the task. Maybe they have a special bond with one of the dragons in the task and can communicate with it, which could add an unexpected twist to the story.

Harry Potter himself is often a central character in these fanfictions. Since he was the one who originally faced the dragon task in the Triwizard Tournament, many fanfic authors like to explore different scenarios with him in the same situation.

In many fanfictions, Harry's view of Dumbledore could shift. After the third task, he might start to question Dumbledore's actions and motives more. He might wonder why Dumbledore didn't protect him better or why he seems to be keeping so many secrets. This could lead to some tension between them. At the same time, Harry's relationships with the other houses could improve. Gryffindor already admires him, but now Ravenclaw might seek his knowledge about the Dark Arts, and Hufflepuff could respect his courage. This could make him more of a unifying figure at Hogwarts, despite the Slytherin opposition.

It could be Dobby the house - elf. Maybe he's on a mission to deliver a secret message to Harry and the cabin in the woods is the safest place he can find him. Another unexpected visitor might be Firenze, the centaur. He could be seeking shelter from some dark magic that's spreading through the Forbidden Forest and the cabin is his last hope.

If Harry were a Dragon Animagus in the First Task, it would change the whole dynamic. He could use his dragon form to create a diversion. For example, he could make the real dragon chase him away from the egg, and then quickly transform back and snatch the egg. Also, his dragon form might have some special abilities like breathing fire in a controlled way to fend off the real dragon if it attacks.