In some 'Naruto doctor fanfiction', the doctor could be a reincarnation of an ancient healer. This doctor might have memories of past cures and treatments that were lost over time. They use these memories to heal the most difficult cases in the Naruto world, like bringing back ninjas who were on the verge of death due to powerful jutsus. Their existence could also attract the attention of enemies who want to use their powers for evil, creating a lot of action and drama in the story.
One interesting 'Naruto doctor fanfiction' could be about a doctor in the Naruto world who discovers a new chakra - related illness and has to find a cure. Maybe they team up with Naruto and his friends to save the village from this mysterious ailment.
There might be a fanfiction where Naruto is trained by a mysterious doctor from another land. This doctor has knowledge of a different type of medical ninjutsu that Naruto combines with his own skills. He then uses this new knowledge to help during a major epidemic that strikes the ninja world, becoming a hero not just as a fighter but also as a healer.
There might be a fanfiction where the mad doctor is actually a misunderstood character. He's trying to cure a rare disease in the Naruto world but his unorthodox methods make everyone think he's mad. For example, he might be using the chakra of demons in a way that seems evil at first but is actually for a good cause.
Perhaps Naruto discovers a new medical jutsu that combines his chakra control with traditional medical knowledge. This could revolutionize the medical field in the Naruto universe. He might use it to heal previously incurable diseases or injuries, and in the process, gain the respect of the medical community. This could also lead to some interesting interactions with other medical ninja, like Shizune or Tsunade.
One possible storyline could be Naruto using his ninja skills in a medical way. For example, he might use his speed to quickly respond to emergency cases in the hospital. He could also use his chakra control to perform precise surgeries that normal doctors couldn't. Maybe he'd develop a new medical jutsu to heal incurable diseases, which would make him a famous doctor not just in his village but across the ninja world.
One interesting aspect could be the crossover of powers and abilities from both universes. Imagine Naruto's jutsus combined with the Doctor's time-traveling tech!
In some fanfictions, Harry as a doctor could be working in a magical hospital. There, he'd deal with all sorts of magical maladies, like a patient whose wand has backfired and caused internal magical imbalances. He'd have to combine his Muggle medical training with magic to treat such cases. He might also face challenges from the more traditional magical healers who are skeptical of his new methods.
One interesting thirteenth doctor fanfiction could be about her adventures in an alternate universe. In this story, she might encounter versions of her old companions in very different circumstances.
One interesting Naruto fanfiction could be those that explore an alternate universe where Naruto becomes a villain. It flips the whole story on its head and shows a different side of the characters. Another type is the ones that focus on Naruto's relationships in a more in - depth way, like his friendship with Sasuke evolving in unexpected ways.
One interesting Naruto fanfiction could be about Naruto learning a new and extremely powerful jutsu from an ancient scroll he discovers. This jutsu gives him an edge in battles against powerful foes like Madara. Another could be a story where Naruto travels to a different dimension and has to team up with alternate versions of his friends to save both worlds.
One interesting Naruto fanfiction could be about Naruto having a secret power that he discovers during a mission in a hidden land. This power could change the way he approaches battles and his relationships with his friends.