In the fanfiction, perhaps Naruto meets the monster girl during his travels. She could have unique abilities that Naruto has never seen before. Their meeting could lead to a series of adventures where Naruto learns about her culture and way of life. This could also be a chance for Naruto to grow as a person, learning to accept differences and finding new ways to use his own skills in cooperation with the monster girl.
It could start with Naruto being on guard. He's used to facing all kinds of threats, so when he first sees the monster girl, he would be in a defensive stance. But then the monster girl might do something unexpected, like offer him some strange but delicious - looking food. This would pique Naruto's curiosity and start their interaction on a somewhat positive note.
There could be a kitsune - like monster girl, with her fox - like features and tricky nature. Another might be a lamia, half - snake half - human, who could have unique abilities related to snakes, like venom or constriction. And perhaps a mermaid - type monster girl, who could bring in the element of water and her own underwater world lore.
Maybe the beautiful girl is actually a spy sent to gather information about Konoha. But as she spends time with Naruto, she's conflicted. Naruto, being his kind - hearted self, shows her the true spirit of Konoha. This changes her perspective, and she decides to abandon her spying mission and join Konoha. They then start a relationship based on mutual respect and new - found loyalty.
In such a fanfiction, perhaps the girl could initially be frightened by Monster X. But then, she might discover that Monster X has a kind heart. For example, Monster X could save the girl from some other danger in the story.
One interesting Naruto monster girl fanfiction could be about a ninja team that encounters a friendly monster girl who has unique powers and joins them on their adventures. For example, she might have the ability to control water in ways that are different from the normal water jutsu in Naruto. This could add a new dynamic to their missions and battles.
One interesting idea could be the unique cultural exchanges. For example, Naruto's ninja world culture interacting with the various cultures of the monster girls. Another might be the power dynamics, like how Naruto's strength compares to the abilities of the monster girls. Also, the relationships could be explored, such as how Naruto forms bonds with different monster girl characters in a harem setting.
FanFiction.net is also a great place to find Naruto monster girl fanfiction. Many writers post their stories there. Just be aware that the quality can vary. You might need to read through a few to find the ones that really appeal to you. You can also check the reviews and ratings of the stories to get an idea of what others think.
It could be the First Hokage, Hashirama. Naruto would be amazed by his powerful Wood - Style jutsu and his ability to create the village. He could learn about the original ideals behind the Hidden Leaf from Hashirama.
In this fanfiction, perhaps the doctor monster has special powers that normal doctors don't. The hurt child might be injured physically or emotionally. If it's physical, the doctor monster could use its unique abilities to treat the wounds. Emotionally, it could offer comfort in a very different way than a typical person would.