Some authors write it to explore Naruto's character in a different light. By having him hurt himself, they can show his vulnerability and his determination to overcome obstacles. It adds depth to his character.
Another scenario could be in a battle. Naruto might face an opponent who is much stronger than him. In his determination not to give up, he could keep fighting even when he's already injured. He might take hits that are too powerful for him at that moment, like a powerful genjutsu that makes him harm himself unknowingly while trying to break free, or getting caught in a powerful ninjutsu attack that damages his body severely.
In such fanfictions, a prevalent theme is the struggle against his own code or nature. Error Sans could be hurting himself as a reaction to the glitches or errors within his own being. His self - harm might be a physical manifestation of his internal battle to either accept or change his fundamental code. Additionally, the theme of despair over his existence in a chaotic or unforgiving fictional world can lead him to self - injurious behavior.
Another theme is character adaptation. Katakuri has to adapt to new environments, cultures, and rules in crossover fanfics. This can lead to some really interesting character development. For instance, in a crossover with a post - apocalyptic world, he might have to change his moral code to survive. This theme is important as it shows different sides of Katakuri's character.
The character interactions are quite special. For example, Naruto's positive and energetic nature contrasts with Katakuri's more reserved and powerful presence. Writers often use this contrast to create interesting dialogues and plot developments in the fanfiction.
The author might justify it through his past traumas. If Error Sans has a backstory filled with pain and betrayal, his self - harm could be seen as a way to deal with those unresolved emotions. For example, if he was once betrayed by someone he trusted, the self - harm could be a form of self - punishment for being 'foolish' enough to trust in the first place.
Another theme is the exploration of an unlikely relationship. Katakuri is a unique character, and the idea of him being in a relationship with an ordinary reader is an interesting concept. Fanfictions often explore how they bridge the gap between their different worlds. It could be about the reader learning about Katakuri's world of pirates and vice versa.
Luffy from One Piece would be an obvious choice. Their relationship in the original One Piece story is already complex and full of potential for more exploration in a crossover fanfiction. They could team up in a different universe or be forced to fight against each other in a strange new setting.
One idea could be a story where a new character, the OC, is a young chef who idolizes Katakuri. They enter a cooking competition in the Big Mom Pirates' territory and Katakuri takes notice. The OC tries to prove themselves worthy of his respect through their cooking skills.
One popular type of OC is a female pirate who is as strong - willed as Katakuri. She challenges him in a battle of wits and strength, and their interactions create a lot of tension and intrigue in the fanfiction. For example, she might try to steal a precious treasure that Katakuri is guarding.