There could be a new professor at Hogwarts. Maybe a young and brilliant wizard who has just returned from a long journey in a far - away magical land. This professor could bring in new ideas and spells, and become an important figure in Harry's new path.
A mysterious old wizard could appear. He might have been in hiding for centuries, and now he emerges to guide Harry on this new path. He could have knowledge about a special type of magic that is key to Harry's new adventure, like a magic that can heal the long - lasting wounds of the wizarding world, both physical and emotional.
A new student from a completely different magical culture might be introduced. For instance, a student from a tribe of wizards who live in the Arctic regions and have unique ice - based magic. This student could interact with Harry and together they could start a new path of cultural exchange and new magic discovery.
Maybe Harry discovers a new magic that was long forgotten. For example, he might find a spell book in the Forbidden Forest that leads him on this new path of magic exploration.
There could be a group of rogue Death Eaters who escaped justice and have banded together again. They believe that Voldemort's ideas were right but that he was too weak. So they target Harry, thinking that if they can defeat him, they can finally achieve their goal of a pure - blood - dominated wizarding world. They might be more cunning and less flashy than Voldemort, making them a more difficult enemy to detect.
One potential new character could be an old hermit - like wizard who has been living in the woods near the manor. He has a deep connection with the land on which the manor stands and can communicate with the spirits of the forest. He could be a source of ancient wisdom for the main characters. Also, a young and adventurous witch who is on a quest to find a lost magical gem that is rumored to be hidden somewhere in the manor. She could bring a new dynamic to the group with her fearless and independent nature. There could also be a magical gardener who takes care of the manor's enchanted gardens and has some secrets of his own.
A new character could be a young wizard from a far - off land who has a unique style of magic. Maybe he's from a place where they use music to cast spells, and he brings this new form of magic to Hogwarts. Another could be a Muggle - born witch who has an extraordinary talent for herbology, much like Neville, and she challenges the pure - blood students' views on Muggle - borns.
A healer who was a friend of Lily's could be introduced. This healer could have some special knowledge about the magic that Lily used to protect Harry, and could help Harry understand more about his mother's abilities.
In this fanfiction, perhaps a new character is an old wizard who has been trapped inside the mirror for centuries. He has a lot of ancient magic knowledge and he becomes a mentor - like figure to Harry. He helps Harry understand the true power of the mirror and how it can be used to save the wizarding world from a new threat.
One possible plot could be that Harry discovers he has a long - lost relative who was a powerful wizard but had been exiled for some reason. This relative has left behind a set of magical tasks for Harry to complete that will lead him to a new kind of magic that he's never known before. It could involve traveling to far - off magical lands and making new allies.
A young, brilliant wizard from a far - flung wizarding community could be introduced. He comes to the Ministry of Magic to share some unique magical knowledge or technology that his community has developed. He could be a bit of an outsider at first, but gradually becomes an important part of the Ministry's operations.
One new character could be a half - giant half - wizard. He's often been an outcast in both the giant and wizard communities. When he comes to Hogwarts, he has to deal with the prejudices of the students and teachers alike. But he also has great strength and a unique perspective on magic. There could also be a character who is a descendant of a former Hogwarts headmaster or headmistress. This character could bring a sense of legacy and new secrets about the school's past.
It could be a young adult who has just graduated from college and is starting their first job, so they are beginning a new path. The 'lemon' could be their quirky roommate who makes their new living situation interesting.