Well, Lucius Malfoy could have a different role. If Harry redoes his life, he could try to turn Lucius against Voldemort by using his knowledge of Lucius's family and situation. This would change the power dynamics within the Death Eaters. Bellatrix Lestrange could also be affected. If Harry were to act differently towards her, perhaps by trying to capture her earlier or using her as a source of information, her role in Voldemort's plans would be altered. And of course, Ginny. Harry could start his relationship with Ginny in a more mature and different way, which would change their dynamic and her role in the overall story.
Voldemort would still be a crucial character. Since Harry is redoing his life, he might try to defeat Voldemort in a more strategic and less dangerous way. Other characters like the Weasley family, who were always there for Harry, would be involved too. They could be part of Harry's new support system in his redone life.
One character that would likely have a different role is Sirius Black. In an alternate universe, he might not have been wrongly imprisoned, and he could be a full - time mentor to Harry. Luna Lovegood could be a more powerful and influential figure in the wizarding world. And Voldemort himself could be a reformed wizard, which would turn the whole story upside down.
Well, first off, James Potter is the central character now. But don't forget about Snape. Given Harry's past experiences as himself, his new identity as James could lead to a very different dynamic with Snape. Lupin would also be important as one of James' friends. And Voldemort, of course. Since Harry's whole goal might be to stop him in a new way, Voldemort would be a major presence in the story. Also, Petunia might have an unexpected role, as Harry now has a different perspective on his Muggle family.
Harry Potter himself, of course. He has always been at the center of things in the wizarding world. His actions and decisions would likely have a great impact on any change that occurs.
One interesting plotline could be Harry using his knowledge from his first life to prevent certain tragedies. For example, he might be able to save Sirius Black much earlier by being more cautious about the events at the Ministry of Magic. Another could be him changing his relationships with his classmates. He might befriend Draco Malfoy in a different way, perhaps by reaching out to him and understanding his family situation better, which could lead to a very different dynamic at Hogwarts.
Hermione is a very likely candidate. With her intelligence, she could easily start a business. For example, she might open a library - like establishment but with rare and restricted magical books that she has managed to collect through her research. She could charge a membership fee for witches and wizards to access these valuable resources.
Hermione would definitely be an important character. She's smart and resourceful, so she'd be the one researching ways to restore Harry's memory. Ron would also be crucial as he's Harry's loyal friend. He'd be there to support Harry and keep him out of trouble. Dumbledore or other wise Hogwarts professors like McGonagall could also play significant roles. Dumbledore might have some secret knowledge or plan to help Harry, and McGonagall could provide guidance and protection at Hogwarts.
Sasuke is very likely to have an important role. Since he and Naruto have a long - standing relationship, Sasuke's reaction to Naruto's Six Paths powers would be significant. He might be jealous at first but then come to accept and work with Naruto in a new way.
Well, there could be a ranger type of character. They are skilled in forest survival and know the lay of the land. Another likely character is a lost traveler who stumbles into this different forest. This character brings a sense of the outside world into the forest setting. And then there are the forest - dwelling tribes or clans. They have their own cultures and traditions related to the forest and can provide a different perspective compared to the outsiders in the fanfiction.
Harry Potter himself is a likely candidate. He has endured so much throughout his life, from the death of his parents to the constant battles against Voldemort. Fanfiction could explore his post - war trauma and how he tries to lead a normal life.