Well, Harry Potter is the main character as the story revolves around his discovery. Draco Malfoy is crucial as it's a 'Malfoy Romance' story. There could also be new characters introduced that are related to the Malfoy family's secrets. Ginny Weasley might also be in the picture, perhaps being jealous or trying to understand Harry's new connection. And don't forget about Dumbledore, who might have known something all along and could offer some guidance to Harry in this strange new situation.
Obviously, Harry Potter himself as he is the one finding out this huge truth. And the Weasley family members, especially those like Mr. and Mrs. Weasley who would play important roles in helping Harry understand his new identity.
In this fan fiction, Harry might initially deny the whole thing. But as he starts to explore this new side of himself, he could discover some hidden secrets about the Malfoy family. This could change his perception of the Malfoys completely. And who knows, it might even lead to a new form of magic or power that he has access to because of his newfound 'Malfoy - ness'.
Draco Malfoy himself would be very surprised if he found out. He might initially think it's some kind of joke or a ploy to embarrass him. But as he realizes Harry is sincere, he could be conflicted. On one hand, he's been taught to dislike Harry, but on the other, this new revelation could make him see Harry in a different light too. As for the other Hogwarts students, some might be amused, while others who are more loyal to the traditional Gryffindor - Slytherin divide might be appalled.
Hermione would probably be involved. She's always by Harry's side when it comes to solving mysteries. She could use her vast knowledge to help Harry figure out what's so special about Vault 99. Ron might also be there. He's Harry's loyal friend and would be ready to back him up in any adventure related to Malfoy and the vault.
Well, perhaps Harry initially struggles with his new - found interest. He might be conflicted because of the long - standing rivalry between his friends and the Malfoys. But then he could start to see Draco in a new light, leading to some awkward and yet interesting encounters between them as he tries to reconcile his feelings with the reality of their families' differences.
Well, it depends on the specific fan fiction. Sometimes, Harry finding out he has mates can lead to a polyamorous relationship which is quite different from the traditional relationships in the original Harry Potter series. This can be really interesting as it shows how fan fiction can take the existing characters and put them in unique situations that the original author might not have considered. It can also be a way to explore themes of love, acceptance, and self - discovery for Harry.
It could be the person who stole Harry in the first place. Maybe they are a powerful wizard who wants to keep Harry away from his real family for some self - serving reasons. They might be afraid that if Harry reunites with his true family, they will lose some kind of power or influence they have gained from keeping Harry in the dark.
Ginny is also frequently paired with Harry in such fan fictions. Given their relationship in the original books, it's a natural extension for fan fiction writers. When Harry finds out Ginny is his mate, it often leads to a more intense and magical exploration of their relationship, with added elements of destiny and true love.
Hermione would probably be very skeptical at first. She would want to research every aspect of this new discovery. Ron would be more likely to be angry or at least very confused. He has always seen the Malfoys as the enemy, so the idea of Harry being one of them would be hard to swallow. Draco, on the other hand, would be quite smug. He might think that Harry is finally realizing that the Malfoys are superior in some way.
There are many possibilities. It could be a character from Slytherin who has a long - standing grudge against Harry. They might be using abuse as a means to undermine Harry's confidence and disrupt his relationship in the romance aspect of the fanfiction. Another option could be a dark wizard in hiding who has a personal vendetta against Harry and sees abuse as a way to torment him without attracting too much attention from the wizarding community.