Hermione would be a great addition. She could be the voice of reason and also use her vast knowledge of magic to help Harry and Draco in their high - stakes situation. For example, when they are facing a complex magical puzzle as part of their mission.
Hermione is often a popular character. She might be the one who discovers something unusual about the toys and helps Harry and Draco understand their significance. Ron could also be there, perhaps getting into some comical situations because of the toys. And sometimes, even the teachers like Dumbledore or Snape can make an appearance, maybe guiding Harry and Draco in their toy - related adventures.
Narcissa Malfoy could also be important. As Draco's mother, she might have mixed feelings about the situation. On one hand, she wants to protect her son, but on the other, she might see the potential good in Harry and Draco working together for the baby's sake.
Narcissa Malfoy could be an interesting character to include. She might be torn between her loyalty to the Malfoy family traditions and seeing the potential good in Harriet for her son. She could play a role in bringing Harriet and Draco closer, perhaps by inviting Harriet to the Malfoy manor under some pretext, which would be a very tense and interesting situation.
One idea could be that Harry and Draco are forced to work together on a dangerous mission to save Hogwarts from a new dark magic threat. They have to put aside their differences and learn to trust each other, with the stakes being the safety of the entire school.
The rivalry aspect. Harry and Draco are natural rivals, and when you add a high - stakes seeker game, it amps up the tension. It's exciting to see how they compete against each other in this setting.
One great 'Harry x Draco higher stakes seeker game' fanfiction is 'The Skyward Duel' on FanFiction.net. It has an exciting plot where the high - stakes seeker game is not just about winning the Quidditch match but also about resolving their personal rivalry and hidden feelings.
Hermione is often a popular character in these fanfictions. She might play a role in helping Harry and Draco get along or in uncovering the mysteries of the Goblet of Fire. Another could be Cedric Diggory. His death in the original story is a big event, and in fanfiction, he could be brought back in some way related to the Goblet of Fire's magic, and interact with Harry and Draco.
Sirius Black would be an interesting character to put in the fanfiction. He has his own history with the dark arts and could offer a different perspective on Barty's actions. And Neville could also be included. His growth and courage could inspire both Harry and Barty in different ways. Neville might stand up to Barty in a situation where others might not, showing his new - found confidence.
I think Luna Lovegood would be an interesting character to include. Her unique perspective on magic and the world around her could add an element of mystery and wonder to the fanfiction. Also, Severus Snape. His complex past and relationship with both Harry and Tom (in a way, as Tom became Voldemort) could bring a lot of depth to the story. And Hagrid, who could provide a connection to the more gentle and nurturing side of the wizarding world, which might be important for Harry and Tom's relationship development.
For a more villainous touch, including Voldemort or his followers could create high - stakes situations. Bellatrix Lestrange could be a terrifying adversary for Harry and Gabi. On the other hand, adding new original characters, like a powerful but reclusive wizard who lives in the Forbidden Forest, could also make the story more exciting.