It could be some rogue ninjas who are against Naruto's new peaceful policies as Hokage. They might see Hinata as a weakness to be exploited to get to Naruto.
Maybe there are some old enemies from Naruto's past who resurface. They target Hinata to make Naruto suffer, thinking that hurting her will break his spirit.
Another type of antagonist could be a strict professor who doesn't like Naruto's carefree attitude and Hinata's association with him. The professor might try to give them a hard time, like assigning them extra difficult projects or being overly critical in class, which becomes an obstacle in their college life and relationship.
It could be some of the old - school ninja clans who are against the new order Naruto and Hinata are trying to establish. They might see their rule as a threat to their traditional power and influence.
Another common antagonist could be a powerful and mysterious dark wizard - like figure who has an interest in Hinata's unique abilities. This figure might be from a far - off land and has come to the Naruto universe specifically to capture Hinata. Naruto has to face this unknown and powerful foe to save her, which usually involves a lot of adventure and discovery as he tries to understand the enemy's powers.
There could be other ninja from rival villages who act as antagonists. They might see Naruto as a threat and target Hinata to get to him during the Chunin Exams. These antagonists would create conflict and danger for Naruto and Hinata, forcing them to grow and rely on each other more.
One possible antagonist could be a jealous student. Maybe someone who has a crush on Hinata and doesn't like Naruto getting close to her. This student could try to sabotage their projects or spread false rumors about them at the academy.
The main characters are obviously Naruto and Hinata. Naruto, as the Seventh Hokage, is a powerful ninja with a big heart. He's known for his never - give - up attitude. Hinata, on the other hand, is a gentle and strong - willed kunoichi. She has always been in love with Naruto and now she's his wife. Their relationship is central to the story, and their personalities play important roles in whatever adventures or events unfold in the fanfiction.
One main antagonist could be a rogue ninja from a hidden village. This ninja has a vendetta against Konoha and targets Naruto and Hinata specifically because of their importance to the village. He uses powerful dark jutsu to try and stop them in their adventures.
The main antagonists could be other powerful clans in the Hidden Leaf Village. For example, the Uchiha clan (if they were still around and had some grudges or power struggles). They might see the restoration of the Hinata clan as a threat to their own status and power within the village.
It could be some new group that emerged due to the changes in the ninja world over time. They might oppose the way Naruto and Hinata's village is being run and want to impose their own ideals.
Maybe Orochimaru's former followers who are still lurking in the shadows. They see Naruto as a threat and Hinata as an easy target to get to Naruto. Another possibility could be some power - hungry shinobi from other villages who view Konoha as weak after the Pain incident. They might target Naruto and Hinata as key figures in Konoha's future to try and undermine the village's rebuilding efforts.