Often, the possession in these fanfictions leads to a change in Naruto's abilities. For example, he might gain new powers that are both a blessing and a curse. He has to learn to use them without being completely consumed by the possessing force. Also, there can be a plotline where the possessor has its own motives, like taking over Naruto to achieve some dark goal in the ninja world, and Naruto has to figure out what that is to stop it.
One common plotline is the struggle for control. Naruto has to fight against the entity possessing him, like in many fanfictions where he battles his own body's takeover. Another is the reaction of his friends. They usually try to find a way to save Naruto, which often involves researching ancient texts or seeking out powerful ninja who might know a solution.
One popular 'Naruto gets possessed' fanfiction is 'Possessed Naruto: The Dark Path'. In this fic, Naruto is possessed by a powerful and ancient spirit, which leads to a whole new set of challenges for him and his friends. Another one could be 'Naruto's Possession: A New Power Unleashed', where the possession actually gives Naruto some unexpected abilities that he has to learn to control.
A popular plotline is when there's a new girl who has a power that complements Deku's really well. Uraraka sees them interact and gets jealous. She may start to doubt her own worth and place in Deku's life. In response, she could either become withdrawn or go on a journey of self - improvement to be more confident and show Deku that she's the one for him.
One common plotline could be him getting physically injured during a battle and his friends having to take care of him. For example, in a skirmish against a group of outlaws, he might get a sword wound and his comrades would need to find a healer. Another could be him getting emotionally hurt, like when there are misunderstandings within his group. Maybe someone accuses him of something he didn't do, which causes him distress.
Some fanfictions may have Nanami getting hurt as a result of overusing his cursed energy. He pushes himself too far in a fight, and his body starts to break down. This can create a very tense situation as his colleagues worry about his well - being and try to find a way to heal him. It also gives an opportunity for character development, as Nanami may have to face his own limitations.
One common plotline is Naruto being betrayed first. He gets hurt so deeply that he turns against the world. For instance, if the Hidden Leaf Village, which he always considered his home, turns on him for some false accusations. This betrayal makes him snap and start seeking revenge, which in turn leads to him causing destruction all over the world.
A common plotline is Naruto being corrupted by the darkness. Maybe he's exposed to a powerful dark entity or power source that slowly starts to change his personality. For example, he might become more withdrawn and aggressive.
Often, there is a plotline about how Naruto's new bloodline affects his relationships. His friends may be in awe, some may be jealous, and his enemies will definitely be more interested in him. In some fanfictions, his new bloodline even causes rifts in his friendships at first as they struggle to understand this new side of him and the power he now wields.
One common plotline could be the mother trying to hide Naruto's connection to the Uchiha from the rest of the village. Since the Uchiha had a somewhat controversial history in Konoha, she might be worried about Naruto being ostracized. Another plotline could be Naruto inheriting some sort of special Uchiha - related power from his mother, which he then has to discover and master as he grows up.
Some fanfictions have Naruto uncovering dark secrets about Konoha. These secrets could be about the actions of the previous Hokages or the village elders. Discovering these secrets makes Naruto lose faith in Konoha and start to hate it.
Another plotline could be that Sakura makes a decision that deeply affects Naruto's life in a negative way. Maybe she chooses to side with an enemy against Naruto's wishes, and this betrayal makes Naruto feel so hopeless that he becomes depressed. In these fanfictions, the writers often explore the complex relationships between the characters and how their actions can have far - reaching emotional consequences on others. There's also a possibility that Sakura's actions cause Naruto to lose his dream or his sense of purpose, pushing him into a depressive state as he feels lost without that driving force in his life.