You could also introduce a family friend who has a deep connection to the Potter family magic. This person might have been a friend of James or Lily and has been watching over Harry from afar. They could be an older, wiser character who helps Harry unlock new levels of his family's magic and also provides some interesting backstory about the family's past.
Well, you could add a long - lost relative of the Potters. Maybe an old aunt who was exiled from the family for some reason in the past and now she returns with a secret knowledge of a powerful family magic. She could be a bit of an outcast character but with a heart of gold.
Another character could be a young wizard from a branch of the family that was thought to be non - magical. He discovers his magical heritage through some strange events and comes to Harry for guidance. This character could bring a fresh perspective and a new set of challenges as he tries to fit into the magical Potter family world.
A half - veela character who uses her charm to get ahead in the Ministry but then realizes the importance of true merit. She could add an interesting dynamic to the often - stuffy Ministry environment.
Obviously, Harry Potter himself. He could be exploring the deeper aspects of his family's magic, passing it on to his kids, or even uncovering secrets about his ancestors.
Hermione would be a great addition. She could use her vast knowledge of magic and research skills to help Harry and Buckbeak in their adventures. For example, if they were on a quest to find a rare magical herb to cure Buckbeak of a strange illness, Hermione would know exactly where to look.
One original character could be a wizard named Aiden. He has the power of teleportation but can only do it within a certain radius. This limitation makes his power both useful and challenging. There could also be a witch named Celeste who has the power of charm - speaking, which is like a super - powered version of the Imperius Curse. She can make people do almost anything she wants just by speaking to them in a certain way. And a centaur named Brutus who has the power to read minds at a short distance could be added. He could be an ally or a source of information for Harry and his friends in the fanfiction.
Adding a character like Amanda Waller would be interesting. She could be pulling the strings behind some of Peacemaker's missions, adding a layer of mystery and political intrigue. Or even bringing in a character like Green Arrow for a brief encounter to see how their different ideologies clash.
The Weasley twins, Fred and George, could be great characters to add. Their mischievous nature and love for pranks could either annoy Cornello or get him to loosen up and see the fun side of magic. They could also use their inventive magical skills to help Harry and Cornello in some tricky situations. Additionally, Luna Lovegood could be added. Her unique perspective on magic and the wizarding world might make Cornello question his own beliefs and she could also form an interesting friendship with Harry within the context of this fanfiction.
A character with the ability to see the future clearly could be added. They would constantly be in a state of conflict, knowing what is going to happen but not always being able to change it. Also, a character who is a magical artist, able to bring their paintings to life in a more vivid and unpredictable way than the normal magic at Hogwarts.
A young witch named Luna, not the same as Luna Lovegood, who has the power to control the weather within the Hogwarts grounds. She could be a new friend for Harry and get involved in his adventures. Another could be a wizard named Orion, who is an expert in ancient runes and helps Harry decipher some hidden messages. There could also be a half - elf named Elara, who works in the Hogwarts kitchen and has a special connection with the magical plants there.
An interesting original character could be a half - elf named Elio. He works in a Diagon Alley bakery, baking magical pastries with ingredients that have special properties. He has a troubled past, being half - elf, and is trying to make a name for himself in the wizarding world. Also, a character like a young wizard named Finn who is a bit of a troublemaker. He's always getting into scrapes in Diagon Alley, whether it's accidentally setting off fireworks in the middle of the street or trying to steal a peek at the new brooms in Quality Quidditch Supplies before they're officially released. There could also be an old wizard named Aldric who has a shop full of enchanted maps that show not only the wizarding world but also hidden realms that no one else knows about.
A magical tutor for Harry's kids could be an interesting addition. This tutor could have some really unique magical abilities and a mysterious past. Maybe a young witch from a far - off land who brings new spells and cultural elements of magic to the story.