How does the relationship between Naruto and Hinata change after the Pain Invasion in fanfiction?

Well, it's possible that Hinata becomes more confident around Naruto after the Pain Invasion. She might be more forward in expressing her emotions, which could lead to Naruto reciprocating her feelings. Maybe they go on adventures together in the village, helping people out and in the process, their bond grows stronger. They could also have some really deep conversations about their pasts, their dreams, and how they see the future of the village, which further cements their relationship.

Naruto could also be more focused. The experience of the Pain invasion made him realize the importance of being fully present and concentrated during battles and training. He might have less of his usual goofiness and be more serious about his growth as a shinobi.

In many fanfictions, after the Pain arc, Naruto and Hinata's relationship often deepens. Naruto starts to see Hinata in a new light. He realizes her strength and her unwavering feelings for him. This can lead to more interactions between them, like Naruto becoming more protective of Hinata and Hinata being more confident in expressing her love for Naruto.

In fanfiction, they might become closer friends. Naruto's heroic deeds during the Pain Invasion could make Ino see him in a new light. She may start to respect him more deeply and offer him more emotional support. They could also train together sometimes, with Ino learning some of Naruto's unique ninja skills.

The 'Demon Naruto' concept could also add an element of mystery and danger to their relationship. Hinata might be constantly worried about Naruto losing control, but at the same time, Naruto's new powers could make him seem more alluring to her. It's like a mix of fear and attraction that can create a unique dynamic between them.

The relationship would likely become more intimate. They'd have more time to just be with each other, sharing their thoughts and feelings without any rush. For example, they could have long conversations at night before going to sleep.

At first, Naruto would be shocked. He might be angry at Hinata for slapping him. But then he would start to think about why she did it. If he realizes his mistake, he could become more cautious around her. Hinata, on the other hand, would probably feel a bit guilty for slapping him, but also relieved that she got her feelings out.

In many fanfictions, after the war, their relationship evolves as they share more emotional moments. Naruto, who has always been focused on being recognized, now turns his attention to Hinata. They have long talks, understand each other's past traumas better, and this understanding cements their relationship. For instance, Naruto realizes how much Hinata has sacrificed for him over the years, and this makes him love and respect her even more.

He could focus on chakra control training. Since he often has issues with his Nine - Tails chakra going out of control, this would be a logical step.

In some of these fanfictions, their relationship develops as they gradually remember their past. They start having strange feelings and dreams, which lead them to explore their connection. As they do so, they start to fall in love all over again, just like in their previous lives.