Another possibility could be Sakura. She could be adopted into the village, perhaps because of her medical skills. In the village, she could learn new ways to combine her medical ninjutsu with the Oni Ogre's knowledge of natural healing. Her strong - willed personality would help her assert herself in this new environment.
Well, in a 'Naruto Oni Ogre Village Adopted' fanfiction, perhaps the main character is adopted because they possess a unique power that the village sees potential in. The story could then follow their journey as they face challenges from both within the village, like rivalries with other adopted or native villagers, and from outside, as their new village has a reputation that attracts enemies. They would need to grow stronger and prove themselves worthy of their new home.
It could be a young Naruto - like character, full of energy and determination. Maybe an orphan who has always dreamed of becoming a great ninja and sees the adoption in the Oni Village as a new start. Or it could be a side character from the original Naruto series who for some reason ends up in the Oni Village and gets adopted there.
In this fanfiction, a really interesting plot could be that the character adopted in the Oni Village has some sort of hidden connection to the village's past. Maybe they are related to an ancient Oni Village hero or villain. As they grow up in the village, they start to uncover secrets about their heritage. This could lead to a journey of self - discovery, while also dealing with the normal Naruto - style ninja battles and rivalries. They might also have to prove themselves to the villagers who are initially skeptical of an outsider being adopted into their community.
It could be Naruto himself. He could be sent on a diplomatic mission to the Snow Village. There, he would face new challenges like the extreme cold and different fighting styles of the Snow Village ninjas. His positive attitude and never - give - up spirit could inspire the Snow Village ninjas and help him make new friends.
Another possible antagonist could be an ancient and powerful ninja clan that has been in hiding for centuries. They see Naruto's village as an encroachment on their territory or a disruption of their long - planned revival. They use their ancient and dark ninjutsu to try and stop the village from growing. They might also try to corrupt some of the villagers to turn them against Naruto and his ideals.
It could be the Nine - Tailed Fox. Since it already has a connection to Naruto, it might take him under its wing in a more fatherly or family - like way. Another possibility is some of the lesser - known demons from the Naruto lore that haven't been explored much.
The shinobi council could be antagonists. They would be very suspicious of Naruto being adopted by Jenova, fearing that he will bring destruction to the village. They might try to isolate or even eliminate Naruto.
There could be a group of dark ninjas who see Naruto's connection with the dragon as a threat. They believe that Naruto and the dragon together could become too powerful and disrupt their evil plans. So, they set out to destroy the dragon and capture Naruto to prevent them from achieving their goals.
Sasuke could be a great main character. He has the power and the complex backstory. If he became the Kage of a different village, say the Mist Village, he could use his Sharingan and his combat skills to change the village's fate. He might try to end the long - standing blood feuds within the village using his own experiences of revenge and redemption.
It could be a new Uchiha character created specifically for the fanfic. This character could be an outcast Uchiha who has been living in hiding, observing the village's problems from afar. He decides to come back and use his unique Uchiha abilities, combined with a new perspective on life, to rule the village and bring about change. He would be an unknown force that disrupts the status quo.