Choji is also a good choice. His growth as a character, both in terms of his physical strength and his self - confidence, can be explored. You could write a fanfiction where he discovers a new form of his Akimichi clan's jutsu and becomes a real powerhouse in Team 10.
Ino has her own charm. Her mind - control abilities can be used in creative ways in fanfiction. She might use it to infiltrate an enemy's base or to protect her friends from a mind - controlling villain. Plus, her relationship with the other members of Team 10 can add a lot of emotional depth to the story.
Shikamaru is a great character to focus on. His high intelligence makes for interesting plotlines. He can strategize his way out of difficult situations. For instance, in a fanfiction, he could be the key to solving a mystery that involves the entire ninja world.
Definitely Reid. His brilliant mind and his complex backstory offer a lot of material for a fanfiction. You can explore his relationship with his mother, his eidetic memory, and how all of these aspects affect his work in new and interesting cases.
Lucy is also a good character to focus on. She has a complex backstory with her family and the celestial spirits. You can explore her growth as a mage, how she becomes stronger in controlling her spirits and her relationships within the team. For example, her friendship with Natsu and how they support each other in battles. Plus, the whole aspect of the celestial spirit world is full of potential for interesting plotlines.
Naruto himself is an obvious choice. Since it's 'Naruto Book 1', there's a lot of room to expand on his character development at the very beginning. Also, Sasuke is a great character to focus on. You can explore his initial aloofness and how it might be different in a fanfiction, perhaps showing more of his inner thoughts and feelings at that early stage.
Sasuke can be a great focus in dark Naruto fanfiction. His already brooding and vengeful nature can be taken to an extreme. For example, in some fanfics, he completely succumbs to the darkness within him, becoming a dictator - like figure in the shinobi world, ruling with an iron fist.
Naruto himself is always a great focus. His journey from an outcast to a hero is full of potential for more drama. You can explore his inner thoughts and feelings more deeply, especially in situations not covered in the original story.
Definitely Naruto and Star Butterfly. Naruto is a powerful and determined ninja, and Star is a magical princess. Their different powers and personalities would create a lot of interesting interactions. For example, Naruto's never - give - up attitude could inspire Star when she faces a tough situation in her own world.
Naruto is a top choice. His never - give - up attitude and his ability to make friends even with his enemies are traits that fanfiction writers love to play with. Sasuke comes next. His relationship with Naruto, both as a friend and a rival, is a goldmine for fanfiction ideas. And Sakura, she has developed a lot over the series. Fanfictions often explore her growth from a love - struck girl to a strong kunoichi, and how she fits into Team 7's dynamic.
Hannibal is often a popular focus. His leadership skills and strategic mind make for great storylines. Writers can explore his past military experiences in more detail or create scenarios where he has to outwit an even smarter adversary.
Sasuke is also a great choice. His relationship with Naruto is always a central point, and during the blank period, we can see how he's adjusting to life back in the village or if he's still on his own path of redemption. And his unique powers can bring a lot of action to the story.
For Kekkai Sensen, Leo is an interesting character to focus on. His abilities and his role in the story of Kekkai Sensen could be explored further in a fanfiction with Naruto elements. He could have some really cool interactions with Naruto characters.