Mrs. Weasley is a very likely character. She's an expert at cooking and baking in the normal wizarding world, so in fanfiction about magical bakes, she could be teaching the younger characters how to make special bakes. Hagrid might also be involved. He could bring in some really strange ingredients from the Forbidden Forest, like giant acorns, to be used in the bakes.
Obviously, Harry Potter would be one of the main characters. He is the one doing the baking. And then, the Volturi, as the recipients of his baked goods. They are a powerful group in the vampire world. There might also be some side characters from the Harry Potter universe, like Hermione, who could be helping Harry with the baking or giving him advice on how to deal with the Volturi.
Hermione Granger is also a common character. Given her love for knowledge and her skills in magic, she would likely be researching the best spells and magical theories to make the terraforming successful. She might be the one to find ancient spells that are crucial for the process.
In many expelled Harry Potter fanfictions, the Weasley family as a whole gets involved. Molly Weasley would be worried sick about Harry and would be cooking up plans to get him back. Fred and George might use their prank - making skills to expose the truth behind the expulsion. Ginny, being Harry's love interest in the original series, would be actively involved in trying to clear his name. And don't forget about the Hogwarts professors. McGonagall would probably be torn between following the rules and believing in Harry.
Harry Potter himself is often a central character. He might be shopping for new school supplies at Flourish and Blotts or looking for a new broomstick at Quality Quidditch Supplies. His friends, like Hermione and Ron, usually accompany him. Hermione might be more interested in books and rare magical artifacts, while Ron would be eyeing the latest Quidditch gear.
Hermione Granger is often involved. In some fanfictions, she discovers hidden conspiracies within the Hogwarts library. For example, she might find a book that reveals a plot by some of the older pure - blood families to keep certain magical knowledge from half - bloods and Muggle - borns.
Harry Potter himself is often a common character. He might be the one who accidentally stumbles upon the hypnosis magic and ends up with a harem. Hermione Granger is also frequently included. Her intelligence could be used in different ways in the story, like helping to understand the hypnosis magic better or being an important part of the harem dynamic. Ginny Weasley is another character that can be part of the harem. She has her own strong - willed personality that can add interesting twists to the story.
Harry Potter himself is often involved. Fans like to write about his potential Animagus training, imagining what kind of animal he might turn into, perhaps a stag like his father's Patronus. Hermione Granger is also a common character. Given her thirst for knowledge and magical ability, she could be exploring Animagus training. Ron Weasley might be included too, and his transformation could be into an animal that reflects his loyalty and sometimes clumsy nature, like a dog.
Some fanfictions may also introduce original characters who are related to known wizarding families. For example, a long - lost relative of the Black family. These characters can bring new perspectives on inheritance. There could also be characters from other magical cultures or regions who have their own unique inheritance systems that interact with the more familiar Harry Potter world inheritance ideas.
Harry Potter himself is often involved. His inheritance from his parents, like the Invisibility Cloak and his family's magical abilities, can be a central part of the story. There could be situations where others suspect he might use his inheritances in a way that betrays the wizarding world, like if he was somehow influenced by the dark side of his family's magic.
Obviously, Harry Potter himself is the central character in this type of fanfiction. Then there are often characters like Voldemort or his Death Eaters, as they are the ones Harry would be changing sides to. Bellatrix Lestrange could be a key figure in trying to persuade Harry or manipulate him into joining their side.