Ron is also a common character. He could provide the comic relief as well as be part of the adventure with Harry. Dumbledore might also show up as he is the wise mentor figure. Harry might seek his advice on how to handle the changes he wants to make in the past without disrupting the future too much.
Snape could be another character that appears. His complex relationship with Harry in the original story could be explored further in the time - travel scenario. Maybe Harry tries to understand Snape better by going back in time and seeing his past actions from a different perspective.
Obviously, Harry himself is a common character. Hermione is also often included as she is Harry's closest friend and very intelligent, so she can help Harry figure out how to navigate the past. Ron might be there too, providing some comic relief and loyalty. Dumbledore usually makes an appearance as he has a lot of knowledge and can offer guidance to Harry in the past.
Hermione is often one of the most common characters. Since she's Harry's best friend and very intelligent, she's likely to be involved in any time - traveling adventures. Another is Dumbledore. Harry might seek his guidance in the past, and Dumbledore's wisdom would be invaluable. Also, Sirius Black could be a character Harry interacts with, especially if he wants to change the events that led to Sirius' death.
Dumbledore is also a character often paired with Snape in such fanfictions. Snape's loyalty to Dumbledore in the original story is complex. When he travels back, their relationship could be rewritten. Snape might confide in Dumbledore about his time - traveling experiences and they could work together more closely to prevent future disasters. Additionally, James Potter could be paired with Snape in a sense that Snape tries to change their relationship dynamic by going back in time, either to befriend him or to avoid the conflicts they had in the past.
Sokka would also be a common character. His strategic mind could be very useful in a different time period. He might be the one who figures out how to deal with the new situations they encounter while in the past. For instance, if they need to outwit an enemy in a historical battle, Sokka would be the one to come up with a plan.
Sasuke is often important. If Naruto goes back in time, Sasuke's story might be greatly affected. Naruto might try to prevent Sasuke from going down the dark path he once did.
Hermione is another common character. Since she is always so intelligent and resourceful, Harry might turn to her for help in understanding the implications of time travel. They could work together to change certain events, like preventing the release of some dark magic that they later had to face. And of course, Ron would also be around. His loyalty and friendship would be a source of support for Harry as he navigates this new timeline.
One common theme is self - discovery. When Rey travels back in time, she often learns more about herself, her powers, and her place in the galaxy. For example, she might find out about her family's past in a different era.
One common theme is redemption. Percy often goes back in time to correct past mistakes, either his own or those of others, seeking a kind of redemption. For example, in some stories, he tries to save characters who died in the original timeline. Another theme is self - discovery. When he's in a different time, Percy learns more about himself and his powers. He might discover new abilities or a different side of his personality.
Obviously, Albus Severus himself is the main character. His friends from his own time might also be involved in some way, like Scorpius Malfoy. And of course, the younger versions of well - known characters like Harry Potter, Hermione Granger, and Ron Weasley are likely to appear.
Hermione would probably be one of the common characters. She could be helping Harry in his research, using her vast knowledge to find solutions to difficult medical cases. Maybe she'd be working on developing new potions for healing.