Another character that is frequently paired with Naruto Fernandes is Sakura. In fanfiction, they might go on medical missions together, with Naruto Fernandes learning more about Sakura's skills as a medic - ninja. Their relationship could develop into a deep friendship or even something more romantic, depending on the direction of the fanfiction.
Sasuke is often paired with Naruto Fernandes in fanfiction. Their complex relationship in the original Naruto series lends itself well to new and interesting storylines in fanfiction. They could be on a new mission together, or perhaps have a different kind of rivalry that goes beyond the typical power struggle.
Kakashi could also be paired with Naruto Fernandes. Given Kakashi's experience and wisdom, in fanfiction they could embark on a mentoring - like journey. Kakashi could teach Naruto Fernandes some new and rare ninja techniques, and they could face various challenges together, like fighting against a powerful new enemy that has emerged in the ninja world.
Often, Naruto himself is paired with Minamoto no Raikou in fanfiction. Their different personalities and abilities can create interesting interactions. Another character could be Sakura. Her medical skills combined with Raikou's combat abilities could make for an interesting team - up.
Naruto is often paired with Rebi. Their personalities can create interesting dynamics, like Naruto's optimism contrasting with Rebi's possible more reserved nature. It makes for great story - building in fanfiction.
Princess Peach is often paired with Dark Mario in fanfiction. Their relationship can be very different from the normal one. Instead of being the damsel in distress, Peach might be a more complex character, perhaps even having a dark side herself and being in a sort of power struggle with Dark Mario. Another character is Luigi. He could be either trying to save his brother from the darkness or be in direct conflict with Dark Mario as he tries to protect the Mushroom Kingdom.
Peridot is a character that could be paired with Yellow Diamond in fanfiction. Since Peridot was once under Yellow Diamond's rule, there can be stories about her loyalty, her possible defection, or how Yellow Diamond views her. There could also be fanfictions that pair Yellow Diamond with other minor Gems from her colonies, exploring the power dynamics and relationships on a more micro level within the Gem society she oversees.
Misty is another character that can be paired with Brock. Their dynamic in the show was quite interesting, and in fanfiction, it could be developed further. For example, they might have an adventure where they have to rely on each other's skills more than ever before.
Sometimes, a new kid in the neighborhood is paired with Kid Tony. This new character brings a fresh perspective and different skills. They might team up to compete in a local talent show or something like that. Their different personalities lead to interesting interactions and storylines.
One common pairing could be with other members of her superhero team. They might interact in a way that shows their teamwork and camaraderie. For instance, she could have a special bond with a male teammate who helps her control her powers better.
In some fanfictions, Harley could be paired with new original characters created by the author. These new characters could be trainers who are either inspired by Harley or are trying to stop his more devious plans in the Pokemon contest circuit.
Pepper Potts is often paired with Dark Tony in fanfiction. Their relationship can take on a whole new dynamic as Pepper tries to deal with this darker version of Tony. Another character could be Rhodey. He might be in the story trying to bring his friend back from the dark side. And sometimes, even villains like Loki could be paired with Dark Tony in some really out - there fanfictions.
Sometimes other monster characters are paired with Miia in fanfiction. For example, there could be a story where she teams up with a more powerful monster who helps her understand her own powers better. Their relationship could be one of mentorship or comradeship.