Lily Luna Potter could also be a main character. She's often described as having a feisty and independent spirit. In a time - travel fanfic, she could bring a fresh perspective. Maybe she has a special ability that is related to time - travel, like being able to sense when the time - stream is disrupted. She would be able to hold her own in the dangerous times of the past, whether it's during the first wizarding war or the days of the Marauders.
Scorpius Malfoy is another likely main character. His family's history and his own inquisitive nature would make him an interesting addition. He might be the one who discovers the time - travel mechanism. His relationship with Albus Potter could also be explored further as they embark on this time - traveling adventure together, and his views on his family's past actions could change during the journey.
Lily Luna Potter might also be a main character. She has a strong personality and her own set of skills. Her presence in the time - travel plot could bring a different perspective, especially when it comes to interacting with the female characters from the past.
Scorpius Malfoy is often a popular character. He's the son of Draco Malfoy, and in fanfics, he can be portrayed as a complex character with his own moral struggles, often forming interesting relationships with the children of Harry Potter and his friends.
Typically, the children of the original characters like Harry Potter, Hermione Granger, and Ron Weasley are main characters. So, you might have Albus Potter, Rose Granger - Weasley, etc. They inherit the legacies of their parents and often have to live up to great expectations.
Obviously, Harry Potter himself would be the main character as the story is centered around his new look. His friends like Ron and Hermione would also be important characters as they would react to his new look and help him deal with any consequences. And there could be new characters introduced, perhaps a mysterious wizard who is somehow related to the cause of Harry's new look.
It could be an original character. Maybe a young wizard who discovers a long - lost time - travel spell. This character could be from a family that has been affected by the dark arts in the past and travels back to change their family's fate. They would then get caught up in the larger events of the wizarding world during that time.
One idea could be that the new generation discovers a time - turning device left by Hermione. They travel back to the time of the first Triwizard Tournament. There, they meet a young Sirius Black and Remus Lupin, and get involved in the mystery surrounding Cedric Diggory's death in a new way.
The children of the original charmed ones would be obvious main characters. They could inherit some of their parents' powers and personalities. For example, if Piper had a daughter, she might have some power over freezing time like her mother, but with her own unique twist.
Another popular character could be Teddy Lupin. Even though he's from the previous generation, he's often included in new - generation fanfiction. His unique situation as a werewolf and his connection to the Potter family make him an interesting character to explore, especially in relation to how he mentors the new - generation characters.
Another possible antagonist could be some of the Hogwarts faculty who were either secretly supporting Voldemort or were too cowardly to oppose him. In a time - travel revenge fanfic, Harry might uncover their true natures and take revenge on them for not doing more to protect the students and the wizarding world from Voldemort's rise.
There could also be characters from the original series that interact with Harry in new ways due to his time - traveling and adopted status. For instance, Dumbledore might have a different relationship with Harry if he is adopted. He could be more of a mentor figure trying to guide Harry through the new changes in his life.