There would be a mixed reaction. On one hand, the die - hard fans of Natsu and Lucy's relationship might embrace it wholeheartedly. They could see it as a natural progression of their relationship. However, some fans might be against it. They might prefer to keep the characters in their more traditional, adventure - focused roles and not get into such adult - like scenarios. Also, there could be fans who think it's out of character for Natsu and Lucy and might not be receptive to this kind of fanfic.
Some fans would be really excited. They might love the idea of seeing their favorite characters in a more mature and family - oriented situation. It could add a new dimension to the Natsu - Lucy relationship that they've always wanted to see.
Their friends would likely be shocked at first. Happy for them, but also a bit worried. Erza, for example, would probably be very protective. She might start giving Lucy all sorts of advice on staying healthy and safe during the pregnancy. Gray might be a bit awkward around the whole situation at first, but would eventually warm up and offer his support in his own way, like helping Natsu with any odd jobs or tasks so he can focus on Lucy.
Erza would probably be very protective. She would make sure Lucy has everything she needs and would be strict about her safety. Gray might be a bit awkward at first, but then he'd be supportive. Happy would be over the moon. He'd constantly be around Lucy, bringing her fish and trying to cheer her up. Wendy would be excited and would offer to use her healing magic to check on the baby's health regularly.
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.
Some fans might be really excited as it adds a new and dramatic twist to the relationship between Marco and Star. They would be eager to read more about how the story unfolds and how the characters develop in this new situation.
The story might start with the discovery of the pregnancy. Natsu would be full of mixed emotions, ranging from fear to a strange kind of excitement. Lucy would be more focused on the practicalities right away. As time passes, they would have to deal with things like baby names, buying baby clothes, and getting ready for the new addition to their family. Their friends in the guild would be involved too, some offering to babysit in the future, others giving them tips on how to raise a strong and magical child. The story would be a mix of the joys and difficulties of an unexpected pregnancy in a magical world.
Well, one possible plot could be that Natsu and Lucy's relationship evolves from friendship to something more romantic. Then, an unexpected pregnancy occurs which throws their lives into chaos. They might have to face the reactions of their friends and deal with their own fears and insecurities about becoming parents.
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.
Natsu would likely be extremely guilty. He might immediately stop whatever he was doing and rush to Lucy's side.
Some of their friends might be worried at first. They know the dangerous lives that Natsu and Erza lead. But then, they would all come around and be very supportive. They could throw a big celebration for the pregnancy, and everyone would chip in to help make a comfortable space for the baby in the guild. There would be a sense of new hope and family spirit in the group.
Well, Natsu is a passionate character. He could react with a lot of excitement. He might pick Lucy up and spin her around, laughing and saying how amazing this is. Or, he could also get a bit worried and start asking Lucy all sorts of questions about her health and what they need to do next.