Well, in some fanfictions, Naruto might control the heartless through his strong will and the power of his chakra. Maybe he uses some new jutsu he developed specifically for this purpose.
Perhaps a dark power corrupts him. In the fanfiction, there could be some sort of dark chakra or evil entity that latches onto Naruto. This entity could slowly eat away at his emotions, starting with his heart, making him gradually lose his ability to feel empathy and turn heartless.
One challenge could be that the heartless have a very different nature compared to the beings Naruto is used to dealing with. Their lack of emotions might make it difficult for him to find a way to connect and control them.
Well, it could imply that the fanfiction about Naruto is lacking in emotional depth or empathy. Maybe it portrays the characters in a cold or unfeeling way, not in line with the original spirit of the Naruto series.
Another issue could be resistance from other forces. There might be some dark entities or villains who don't want Naruto to control the heartless. They could try to stop him, either by directly attacking him or by using their own powers to counteract his control methods.
No. Naruto is known for his kind heart and strong sense of justice. In the original series, he always tries to understand his opponents and save them rather than being a heartless killer.
Maybe Naruto has been through some extremely cruel experiences that make him lose his compassion. For example, he might have witnessed the repeated betrayal of his friends, which gradually hardens his heart.
A great 'Naruto Control Heartless' fanfic is 'Naruto: Heartless Redemption'. This story delves deep into Naruto's psyche as he tries to control his newfound heartless nature. It starts with Naruto experiencing a great loss that causes him to shut off his emotions. As the story progresses, he has to learn how to balance this new side of him with his true self. The fic also has some amazing fight scenes where Naruto uses his heartless state to his advantage, making for a really engaging read. It also explores the relationships he has with his friends and how they react to this change in him.
One interesting 'naruto heartless fanfiction' could be where Naruto loses his emotions due to a dark jutsu. In this story, he becomes a super efficient ninja but at the cost of his humanity. His friends struggle to bring back the old Naruto.