He might be initially shocked. Naruto has been so focused on his goals like becoming Hokage that he may not have expected Hinata's love. He could be really touched that someone as kind and gentle as Hinata has had such deep feelings for him all this time.
Well, at first Naruto could be completely dumbfounded. I mean, he's always seen Hinata as a friend, a fellow ninja from the village. But when he finds out about her love, he'll start to recall all the times Hinata has been there for him, like during the Pain attack. He'll begin to understand that her love has been a constant presence in his life, and this realization might make him more protective of her and more aware of his own feelings towards her. It could be a turning point in their relationship, as he now has to figure out how he feels about her in return.
He might be initially surprised. Naruto has always been a bit oblivious when it comes to romantic feelings. So, his first reaction could be shock, with his eyes widening and him stuttering a bit as he tries to process the new information.
He would be very angry. Naruto is not one to take betrayal lightly.
She might become more confident. Since Naruto now knows how she feels, she doesn't have to hide her emotions as much. So she could be more open in her interactions with Naruto.
Well, Naruto's reaction can vary. Sometimes, he might be a bit hesitant at first. Given his past focus on becoming Hokage and his general obliviousness to Hinata's feelings in the original story, he could take a moment to fully process what she's saying. He might then respond with a heartfelt speech about how he values her and wants to explore their relationship further. For example, he could say something like 'Hinata, you've always been there for me, and I want to be there for you too. Let's see where this love takes us.'
Naruto might be overjoyed. He's always been someone who values friendship and love, and Hinata's confession could be like a dream come true for him. He could immediately accept her love and start planning a future together.
Well, Naruto could have a range of reactions. On one hand, he might feel a sense of isolation, thinking that he's different from all the other ninjas he knows. But on the other hand, his adventurous spirit could also make him curious about what this new part of him means. He might start to wonder about his powers and how they relate to his demon heritage. He could also be a bit scared, especially if he has been taught to fear demons in the ninja world.
In some cases, Naruto could be deeply hurt and withdraw from Hinata. He might question their relationship and whether he misjudged her all along. If the hurt is physical, he may also be more cautious around her in future interactions. For example, if she accidentally used a strong jutsu on him during training, he might be hesitant to train with her again without proper precautions.
Hinata might also be determined to prove her innocence or change Naruto's mind. She could start on a journey to find out the real reason behind her banishment and clear her name. She may gather allies and evidence to show Naruto that he has been misled.
Hinata might be very hurt. She's a sensitive person, so Naruto yelling at her could make her feel small and sad. She might start to doubt herself and her abilities.
In some fanfictions, Naruto may become extremely bitter. He could feel a deep sense of betrayal and this might fuel his determination to become stronger, not for the sake of the village at first, but more for self - vindication. He might isolate himself from others and struggle with his identity.