Definitely Harry himself. Since he is the one being sent back in time, he is central to the story. His actions and decisions in the past are what drive the plot forward.
Harry himself is obviously a very popular character in these fanfictions as he is the one being sent back in time. But also, characters like Sirius Black are often popular. Fans like to explore how Sirius would react to Harry being in the past, and how their relationship could develop differently.
Jiraiya is often a popular character in 'Naruto sent back in time fanfiction'. Since Naruto has a strong bond with him in the original series, in these time - travel stories, Naruto can learn even more from Jiraiya in the past and they can have new adventures together. Kakashi is also favored as he can be a mentor to Naruto in a different way with Naruto's new perspective.
Well, Hinata is often a popular character in these fanfictions. Since Naruto has a chance to redo things, his relationship with Hinata can start earlier or be developed in a more in - depth way. Jiraiya is also a favorite. Imagine Naruto going back and being able to spend more time with Jiraiya, learning even more from him. And of course, Itachi. Naruto could potentially change Itachi's fate, and fans love to explore this possibility in the fanfiction.
Obviously, Harry Potter himself is a central character in such fanfiction. Then there's Hermione Granger. Her intelligence could play a big role if she also travels back in time. Another popular one is Severus Snape. His complex relationship with Harry and his past make him an interesting character to include in time - traveling scenarios.
Harry Potter himself is often a central character in these fanfictions. His journey through time to fix things or gain more knowledge is a common plot. Hermione is also popular as she's the brains and could potentially figure out the complex mechanics of time travel. Another popular character is Draco Malfoy. Writers like to explore his character in different scenarios, especially if time travel allows him to have a different relationship with the other characters.
In these crossovers, Harry Potter himself is often very popular. People like to see how he'd react to the strange and wacky world of Adventure Time. Another popular character is Jake. His stretchy powers and laid -back attitude make for interesting interactions with the more serious Harry Potter characters.
Hermione is often popular. Her intelligence and love for knowledge make her a great candidate for time - related adventures. She could be the one to figure out complex time - magic theories.
Harry Potter himself is often a popular character. Fans like to explore how he would adapt to the new time - related challenges in the 'Lord of Time' setting. His courage and determination make him a natural fit for dealing with the complex situations that might arise.
Definitely Hermione. Since she's Harry's closest friend and very intelligent, she would be deeply involved in any changes Harry tries to make. Also, Snape. Harry's actions in the past could completely change his relationship with Snape. And of course, Voldemort. If Harry goes back far enough, he could potentially stop Voldemort's transformation into the evil wizard he became.
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.