If the two meet, Harry's family history as a hero in the wizarding world could intimidate Draco. His father might have told him to be wary of Harry. Meanwhile, the Malfoy family's wealth and status could make Draco act superior. But Harry, having grown up with the Dursleys, might not be as impressed by Draco's family's status as Draco expects. This could lead to an interesting power dynamic in their encounter.
In some fanfictions, they might initially dislike each other. Draco, with his pure - blood supremacist upbringing, could look down on Harry. For example, he might make snide remarks about Harry's lack of knowledge about the wizarding world. However, this early encounter could also lead to a different dynamic later at Hogwarts. Maybe Harry would be more prepared to face Draco's taunts because of this prior meeting.
If they were friends before Hogwarts, it could create a lot of internal conflict at Hogwarts. Draco might be torn between his new Slytherin friends who dislike Harry and his long - standing friendship with Harry. He might try to keep their friendship a secret, which could lead to misunderstandings between them.
Their meeting could also mean that Fleur might be more protective of Harry at Hogwarts. Since she knew him before, she might feel a sense of responsibility. So, during the Tournament, she could offer him some tips or help in a more discreet way, which could change the dynamics of how the Tournament unfolds for Harry.
The dynamic would be different. They might be more like co - conspirators in a magical adventure that starts before Hogwarts. They could be more secretive and have a special bond that the other students at Hogwarts might not fully understand. This could lead to them being more isolated as a duo, but also more reliant on each other.
Their relationship could change Hogwarts in many ways. For one, they might form an alliance against common enemies within the school, like bullies or those who promote pure - blood supremacy too aggressively. This could lead to a more united front among the students. Also, their friendship (if it develops) could influence house rivalries. Gryffindor and Slytherin might not be as divided as before. Students might start to see that there are good people in both houses and that family bonds can transcend house differences.
At first, they would avoid each other as much as possible. But when they are forced to collaborate on something important, like planning a big event at Hogwarts, they begin to communicate. They argue a lot in the beginning, but then they realize that they have more in common than they thought. They both care about Hogwarts and its future, and this common ground could be the foundation for a better relationship.
The story would be drastically different. Without Harry, there's no Boy - Who - Lived to be the main antagonist to Voldemort. Hogwarts might not be the safe haven it was in the original series. Voldemort could target the school more directly, and the students would live in constant fear.
At first, their relationship might be full of confusion. They've been brought up with different values - Harry with his Gryffindor courage and sense of justice, and Draco with Slytherin pride and ambition. But as they discover they're twins, they'd start to see the similarities in themselves. They might begin by being a bit hostile towards each other, but gradually, as they face challenges together, like dealing with a particularly tough teacher or a dangerous creature on the grounds, they'd form a bond.
Maybe he meets an old Canadian witch who has a lot of wisdom about a certain type of magic that is rare in the UK. She could give Harry some valuable advice or a magical item that helps him later at Hogwarts.
One possibility is that they meet in Diagon Alley. Maybe Ginny is there with her family, getting her school supplies, and Harry just happens to be in the same shop. They could share a brief moment, like a shy smile or a simple hello. This encounter could be the start of a pre - Hogwarts friendship that they keep secret until they meet again at school.