Natsu's character would change drastically. His sense of humor would disappear. He'd be constantly on edge, snapping at the slightest provocation. His loyalty to the guild might be tested as he's so consumed by his grief. He may start to see the world in a more cynical way, believing that he can't protect those he cares about. This new Natsu would be a far cry from the lovable, hot - headed but ultimately good - natured character we know. His anger and grief could lead him to make some really bad decisions that he would never have made before Lucy's death.
He would probably be more withdrawn. Instead of being the social and friendly Natsu, he'd push people away. His focus would be solely on dealing with the pain of Lucy's death, and he might not care about the consequences of his actions. For example, he could be more willing to use excessive force against his enemies without considering the potential harm to himself or others.
Natsu would likely become much darker. His normally cheerful and carefree attitude would be replaced with a brooding and vengeful one.
Well, it could be that Natsu's snap makes him question his own strength and purpose. He might think that if he had been stronger, he could have saved Lucy. So, he embarks on a journey to become even more powerful. Along the way, he meets some characters who either try to stop him from his self - destructive path or join him in his quest for revenge. His relationship with the other guild members would also be severely strained as he's in such a dark place after Lucy's death.
Natsu would likely be extremely guilty. He might immediately stop whatever he was doing and rush to Lucy's side.
Well, at first, they might be a bit scared and it could put some strain on their relationship. But as they come to terms with it, they would grow closer. Natsu would be more protective of Lucy, and Lucy would be more patient with Natsu's sometimes reckless behavior. They would start to plan their future together, thinking about things like where they will live and how they will raise their child. Their relationship would transform from a more carefree one to a family - centered relationship.
After getting married in the fanfiction, their relationship would transform in multiple aspects. In public, they would be seen as a united front, which would have an impact on how others in the guild view and interact with them. At home, they would have to learn to share responsibilities. Natsu could take on more tasks like protecting their home magically, while Lucy could handle the day - to - day organization. Their emotional bond would also be different. They would have a new level of intimacy that comes with the commitment of marriage. This could be shown through small gestures like Natsu bringing Lucy her favorite book without her asking, or Lucy making Natsu's favorite food just because she knows he had a tough day.
Their relationship might become more affectionate. They could start holding hands, hugging more often, and generally showing more physical closeness.
His friends would be very concerned. Gray, for example, might try to physically stop Natsu from drinking more. Erza would likely be more gentle and try to talk to him, to make him understand that getting drunk won't bring Lucy back.
If Natsu is a girl in this fanfiction, her character might change in terms of her relationships. For instance, she may be more self - conscious about her appearance compared to when she was male. Also, her interactions with male characters like Gray could shift. Instead of their typical rival - like banter, there could be a more complex emotional undertone, like a friendly - rivalry with a hint of romantic tension perhaps.
She might start to blush furiously. Given her character, she is a bit shy when it comes to romantic matters. And then she might start to stammer out a response, not really sure what to say at first. As she composes herself, she could tell Natsu that she has feelings for him too but in a very gentle and sincere way.
In fanfiction, if Natsu and Lucy had a baby, it would be a huge shift for their relationship. Natsu would no longer be just the impulsive dragon slayer. He'd have to be a father figure. Lucy, with her kind heart, would pour all her love into the baby. They'd have to work together to balance their guild duties and family life. Natsu might bring the baby on small, safe adventures, teaching the child about the world of magic, while Lucy would make sure the baby has a stable home environment. Their relationship would be centered around this new life they've created.
I'm not entirely sure as I haven't read it specifically. But generally, a fanfiction about 'natsu' might be based on a character named Natsu from a particular series. It could involve his adventures, relationships, or some unique situations that the author has created within the framework of the original story or in a new, imaginative world.