One possible plot could be that the twin has been hidden away by some dark force all this time. When Harry discovers the twin, they have to figure out how to break the spell or curse that was placed on the twin. Another plot might be that the twin has been living in the Muggle world, unaware of their magical heritage, and Harry has to introduce them to the wizarding world and they face various challenges together.
In some fan fictions, the twin could be on the side of the bad guys without knowing it. Maybe they were brainwashed. Harry then has to find a way to reach out to his twin and show them the truth. It could lead to a great internal struggle for the twin as they come to terms with who they really are and which side they should be on. There could be a lot of emotional moments as Harry tries to save his twin from the wrong path.
Often, there are plots centered around secrecy. Harry might worry about how others will react, like his friends Hermione and Ron. So, he tries to keep his relationship with his mates a secret. And then there's the plot of the mates themselves getting to know each other better. Since they are all in a relationship with Harry, they need to form their own bonds too, which can lead to some really interesting interactions and storylines.
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.
One possible plot development could be that Harry embarks on a journey to find his real family. He might start by looking into any clues he can find in his adoptive family's belongings or memories. Another could be that he faces a lot of internal conflict. He has grown up in a certain environment and now has to come to terms with the fact that it was all based on a lie. He may also have to deal with the reactions of his friends, some of whom might not believe him at first.
One popular one could be 'The Unforeseen Bond'. In this fan fiction, Harry discovers his mate in the most unexpected of places, like during a Quidditch match when he feels an instant connection to a new student. It has a really engaging plot with a lot of sweet moments between Harry and his mate as they navigate their new relationship while also dealing with the usual Hogwarts chaos.
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.
He might be shocked and filled with anger. He could immediately want to comfort Harry and ensure his safety.
In some fanfictions, Harry might find out he's a wizard through a different magical being rather than Hagrid. For example, a mysterious wizard who has been secretly watching over him all along reveals the truth. This could lead to a whole different dynamic as Harry might initially be more suspicious of this new figure compared to Hagrid.
Well, perhaps he discovers long - lost relatives from a hidden branch of the family. Maybe they are powerful wizards who have been in hiding all this time.
One interesting plot could be Harry's struggle to accept Severus as his father. He has such a long - held image of Severus as an enemy, and now he has to come to terms with this new reality. Another plot could be Severus trying to make up for lost time and be a good father to Harry. There might also be a plot where the wizarding world reacts to this news. Some might be shocked, others might not believe it at all.
Maybe Harry discovers he was secretly adopted by the Weasleys all along. So he has to adjust to this new reality and learn about his true family ties within the Weasley clan.