In Naruto, Rock Lee could be a great focus. His hard - working nature and unique fighting style could bring something new to the crossover. In the One Piece world, Usopp might be an interesting choice. His lies and inventions could create some humorous and strategic situations when combined with Naruto's world.
Kakuzu from Naruto is often overlooked. His ability to use multiple hearts and different elemental attacks could be a fascinating addition to a fanfic. In One Piece, Chopper could be a focus. Picture Kakuzu trying to capture Chopper for some strange reason, and Naruto characters having to protect him. This would lead to a lot of action and character development for both series' characters.
For Naruto, Hinata could be an underrated character to focus on. Her gentle yet strong personality could be interesting in the One Piece universe. From One Piece, Brook could be a great pick. His skeletal form and musical abilities could lead to some really unique interactions with Naruto characters. There could be a story where Hinata is intrigued by Brook's music and they form an unlikely friendship.
Shino Aburame is quite underrated. In a fanfiction, he could be shown as a key figure during the Revolution. His unique insect - based jutsu could be developed further, and his calm and intelligent nature could be used to his advantage in the political and social upheaval of the time.
One underrated character could be Iruka. In a fanfiction set in the Heroic Age, he could be shown as a young and ambitious ninja, not just a teacher. He might have had his own adventures and battles that shaped him into the person we see in the main Naruto story. Another is Shino. He has unique abilities with his bugs, and in the Heroic Age, he could be part of a special unit using his skills in a more strategic and crucial way.
There's also Brain. He has his own quirks and a mysterious side to him. A fanfiction could be written about his attempts to uncover some hidden secrets within the Kingdom Hearts Union X world. It could show his intelligence and resourcefulness as he delves deeper into things that others might not have noticed, making him a really engaging character to center a story around.
The Wasp. She is a powerful and intelligent character. A fanfiction could center around her leadership skills within the Avengers. Maybe she has to lead the team in a situation where all the big - name heroes are incapacitated. It would show her strategic thinking and her ability to inspire others.
The stable hands who take care of the dragons often get overlooked. They have a unique perspective as they interact closely with the dragons on a daily basis. Fanfiction could explore their lives, their dreams, and how they view the dragon riders.
The White Rabbit is often just seen as the one who leads Alice into Wonderland, but he could be so much more in fanfiction. He could be a time - traveler, for example, and his hurry is because he's always on a tight schedule to different eras. The Tweedle brothers are also underrated. They could be the key to unlocking some ancient secrets of Wonderland. In a fanfiction, they could lead Alice on an adventure full of riddles and puzzles that reveal the true nature of Wonderland. And the Caterpillar is quite an interesting character to focus on. It could be a wise sage who holds the knowledge of the entire Wonderland universe.
Hot Pie. He may seem like a minor character, but he has a lot of potential. A fanfiction could explore his life after leaving Arya. Maybe he becomes a famous baker in a large city, and through his bakery, he gets involved in the political intrigues of the city as people from all classes come to his establishment.
Hot Pie is an underrated character. He could be the focus in a fanfiction where his baking skills become more than just a side note. Maybe he bakes special treats that have magical or medicinal properties and gets caught up in the big political and power struggles because of it.
Definitely the Northuldra people in general are underrated as a whole for fanfiction. They have a rich culture that we only got a glimpse of in the movie. Focusing on one of the unnamed Northuldra characters, perhaps a young girl who was there when Elsa first arrived in the forest. She could have her own perspective on the events and her own story of how she saw Elsa as a potential savior or a threat. Also, the guards from Arendelle who were with Mattias could be the focus. Their adjustment to living in the forest for so long and their loyalty to Mattias could be explored in a fanfiction.
One idea could be a story where Naruto and Luffy meet in a strange dimension. They have to team up to fight a powerful enemy that is threatening both their worlds. They learn from each other's unique abilities and ways of thinking.