In the official Naruto story, Naruto is a symbol of hope. He has his own struggles but always overcomes them with his positive attitude. He forms deep bonds with people. However, the 'heartless killer' concept in fanfiction ignores all of this. His character was built on the foundation of kindness and the will to change the world for the better, not to be a cold - blooded killer.
Well, in the original Naruto story, Naruto is mostly seen as a hero or an underdog trying to prove himself. But in this fanfiction, he is feared. This is a huge deviation. The original Naruto is all about friendship, hard work, and believing in oneself. In the fanfiction, it seems to focus more on the negative perception of Naruto, which changes the whole dynamic of his character relationships.
In the original Naruto, the characters are constantly building relationships and working together. But in antisocial fanfiction, Naruto may be shown as rejecting these relationships. He could be written as being bitter and cynical, which is a far cry from the optimistic and determined Naruto we know. This deviation changes the overall feel and message of the story, moving away from the themes of unity and hope that are central to the original.
The character dynamics are likely to be very different. In the original, Naruto is seen as an underdog trying to gain recognition. As a monster in the fanfiction, he might be feared or shunned, which is a huge departure from the original story where he gradually earns respect through his hard work and determination.
The original Naruto story doesn't depict Naruto as bipolar. So in this fanfiction, it's a major deviation. His stable and determined character in the original is replaced with a more erratic one.
In the original Naruto storyline, Sakura's relationship with Naruto is more of a complex friendship. But in fanfiction, the kiss can be a turning point that changes the nature of their relationship much earlier. It allows for a more romantic - centered plotline compared to the shonen - action focus of the original.
In the original storyline, Yagura was the Fourth Mizukage who was being controlled by Obito. He was more of a victim. But in this fanfiction, Naruto kills him, which is a huge deviation as Naruto is usually about saving people. In the original, Naruto tries to understand and redeem his enemies, not kill them outright.
The original Naruto storyline focuses on Naruto's growth, his pursuit of becoming Hokage, and his relationships within the ninja world in a more traditional sense. However, in 'itachi cheats on naruto fanfiction', it takes a very different turn. It adds a whole new layer of drama and conflict that is not present in the original. Itachi's character is also distorted in a way as it gives him a new, rather uncharacteristic behavior of 'cheating' which changes the dynamics of how we perceive him and his connection to Naruto.
In the original story, Naruto loves ramen. It's a big part of his character. So in this fanfiction, it's a complete opposite. It changes the fundamental aspect of his relationship with food.
The original Naruto story has a set of rules regarding the nature of chakra, ninjutsu, and the relationships between different species and entities. In the 'naruto impregnates kyuubi fanfiction', all these rules are thrown out the window. It's a huge deviation as it brings in a concept that is not only inappropriate in the context of the original Naruto story but also changes the fundamental understanding of the characters and their capabilities. For example, the Kyuubi is no longer just a source of power for Naruto but is now involved in a very different kind of relationship that was never even hinted at in the original series.
Well, in the original Naruto storyline, Naruto is mainly focused on becoming Hokage and protecting the village from external threats. In the 'naruto framed prison fanfiction', he is suddenly in a position where he has to fight for his own freedom and reputation, which is a big deviation.