In some fanfictions, a great plotline could be Harry and Luna forming a closer bond because of the Goblet of Fire chaos. Luna could be the one to comfort Harry when he's facing the difficulties and dangers of the tasks. And together, they might even uncover a conspiracy among the teachers or judges that was meant to manipulate the results of the Triwizard Tournament.
One interesting plotline could be Daphne and Harry teaming up secretly to investigate the mystery behind the Goblet of Fire. Maybe they suspect some dark magic interference that others haven't noticed yet.
One interesting plotline could be Draco secretly helping Harry during the Triwizard Tournament. Maybe he has a change of heart and realizes that the dark side isn't what he really wants. Another could be a friendship forming between them in the face of a common enemy within the tournament. For example, a dark wizard who tries to manipulate the tasks for their own evil purposes.
One possible plotline could be a friend betraying Harry to gain favor with the Death Eaters. Maybe they leak information about Harry's tasks in the Triwizard Tournament. This would add a whole new layer of danger and drama to the story.
One possible plotline could be how Harry copes with the unexpected summons. Maybe he has to deal with the distrust of his friends who suspect him of somehow cheating the Goblet. Another could be his training in secret for the tasks, perhaps with the help of an unlikely ally.
One interesting plotline could be a different take on the Triwizard Tournament tasks. Maybe the challenges are not as straightforward as in the original, with hidden twists and alliances among the champions that we don't see in the book. For example, the champions might have to work together in some tasks secretly to overcome a greater threat that the judges don't know about.
The main characters are obviously Harry Potter and Luna Lovegood. Harry is the well - known wizard who has to face the challenges of the Triwizard Tournament in the Goblet of Fire. Luna is the dreamy and unique Ravenclaw student who often has her own off - beat view of the wizarding world.
One interesting plotline could be Hermione and Fleur teaming up to solve a mystery within the Triwizard Tournament. They might use their combined intelligence and skills. For example, Hermione's vast knowledge of magic and Fleur's charm and unique magical abilities could be a great combination to figure out a dark plot against the champions.
One common plotline is Dark Harry competing in the Triwizard Tournament with a more devious approach. Instead of just trying to survive and win fairly, he might use dark magic to outwit his opponents. Another is his relationship with the Death Eaters. He could be in a situation where he is being courted by them, and he has to decide whether to join or resist.
One interesting plot idea could be exploring what would happen if a different student was chosen for the Triwizard Tournament. Maybe a shy and overlooked student gets picked, and they have to overcome not only the tournament tasks but also their own insecurities. Another idea could be a love triangle involving characters that were not part of one in the original story. For example, a friendship between a Hufflepuff and a Slytherin turns into a complex relationship when feelings for Harry Potter get involved.
One interesting plot twist could be that Harry has an unexpected ally in the Triwizard Tournament. Maybe a Slytherin student who has a hidden agenda but ends up helping Harry in a crucial task. This would change the dynamic of the traditional House rivalries.