It could also be due to the constant pressure and expectations on him. He's always had to be the hero, the one to save the village. If he feels he's constantly failing or not living up to those expectations, he may close his heart to protect himself from that self - doubt and disappointment. In the fanfic, perhaps there are new threats to the village that he feels he can't handle, and this leads to him shutting down emotionally.
Well, it might start with Naruto distancing himself from his friends. He stops going on missions with them, and he doesn't show up at their usual gathering places. For instance, he might avoid Ichiraku Ramen, which was always a place of connection for him and his friends.
Perhaps after facing too much betrayal from the village he loves. If the villagers turned on him despite all his efforts to protect them, it might lead him to close his heart in self - defense, not wanting to be hurt again. He's always tried so hard to gain their acceptance and if that was all for naught, it would be a huge blow.
A 'demon in his heart' in a Naruto fanfic could refer to many things. It might be about a character who has an inner struggle with a 'demon' - perhaps a dark side of their nature, like Naruto's struggle with the Nine - Tails. It could also be about a new character introduced in the fanfic who has a 'demon' within them that affects their actions and relationships with other characters in the Naruto universe.
One possible theme could be redemption. If a character has a 'demon in his heart', they might strive to overcome it and find redemption. Another theme could be self - discovery. As the character battles their inner 'demon', they may learn more about themselves.
Yes, there are many fanfics that explore the relationship between Naruto and Sakura. Some might show them having deep emotional moments or growing closer as friends or comrades. However, not all fanfics are of high quality, and it's important to look for well - written ones.
Self - reflection is key. If Naruto takes the time to really look at himself and understand why he closed his heart in the first place, he can start to work through those issues. Maybe he realizes that closing his heart is only causing him more pain in the long run and that by being open, he can experience the full range of human emotions again, both the good and the bad.
One possible reason could be to protect his friends. He might think that by sacrificing his heart, some great danger or enemy would be vanquished, thus ensuring the safety of those he cares about. For example, if there was a powerful curse that could only be broken by his heart's sacrifice.
The story could take a dark turn. Without his heart, Naruto might become a soulless being, and his friends would be devastated. They might try to find a way to get his heart back. Maybe they search for a powerful sage or some ancient magic that could reverse what has been done.
Naruto would likely be portrayed as the energetic and determined one. His never - give - up attitude would be on full display, constantly pushing the team forward. Sasuke would be the brooding and powerful member, with his cool exterior hiding a complex inner self. Sakura would be shown as the intelligent and strong - willed female character, evolving from a somewhat naive girl into a capable fighter and healer.