Harry's memories in fanfiction can really stir things up for the other characters. His memories of growing up with the Dursleys, for instance, might make some characters feel sorry for him and more inclined to offer him a real family - like the Weasleys might become even more motherly and fatherly towards him. And his memories of battles and narrow escapes can give the other characters valuable insights into the tactics of the enemy. They could use this knowledge to better prepare for future confrontations. In a way, Harry's memories are like a key that unlocks a deeper understanding among his comrades.
A frequent theme is the exploration of trauma. Harry has been through a lot, and his memories can expose his past traumas. This can lead to themes of healing and support among the characters. Also, the theme of sacrifice often comes up. His memories might show the sacrifices he has made or seen, which can inspire others. Additionally, themes of loyalty are common. When his friends see his memories, it can reinforce their loyalty to him and to the cause of fighting against evil.
His relationships with his friends like Sasuke and Sakura would be deeply affected. They might feel like they've lost a part of Naruto. Sasuke, for instance, might initially be frustrated as he's used to Naruto's determination. Now, with his memories gone, Naruto might seem like a different person to Sasuke.
First of all, his friends would likely be very curious. Since Naruto has had a rather eventful childhood, the fanfiction could contain a lot of personal elements. They might be amused by his childish handwriting or the simple way he used to express his ideas. Some might even be touched if the fanfiction reveals Naruto's hidden insecurities or hopes from back then. It could also lead to his friends having a new perspective on Naruto, seeing a side of him that they didn't know before.
She might be shocked. Naruto has had a really tough life and seeing all those memories of his loneliness, the villagers' hatred towards him when he was a kid, and his constant battles would be overwhelming for her. She could become more protective of Naruto, seeing him in a new light as someone who has overcome so much.
In some fanfictions, Naruto's pain might manifest through his actions. For example, he could become withdrawn and isolate himself from his friends. This is because Naruto has always been a social person, so any deviation from his normal behavior could be a sign of his internal pain.
One possible cause could be his sense of failure. Naruto always wants to protect his friends and village, so if he fails in a mission or is unable to save someone, it can cause him great pain.
There are fanfictions where Naruto's power is shown through his ability to connect with the spirits of past Hokages. With their combined wisdom and his own strength, he's able to perform a super - powerful jutsu that not only protects Konoha but also restores the balance of the ninja world. He uses this new - found power to face an ancient evil that has been awakened.
It could strengthen his bond with his family. Since Kushina was his mother, having her memories might make him understand her better and also feel closer to his father, Minato. He would know the love and sacrifices they made for him, which could make him more protective of the family name and legacy.
The memories of his relatives could also make Naruto more determined to protect the village. He could recall how his family sacrificed for the village in the past. This would give him a deeper sense of purpose. He might start to look into old family secrets that could be beneficial for the village's safety, like hidden jutsu or strategies that his relatives knew. These memories would be a source of strength and knowledge for him.