Laxus would experience a significant shift in his priorities. His focus would no longer be solely on his own power and status within the guild. Instead, he'd be more concerned about providing a stable and safe environment for his child and Lucy. This might lead to him mending some of his past relationships within the guild. Lucy, on the other hand, would develop a deeper sense of purpose. Her pregnancy would make her realize the importance of family and legacy. She'd start to pass on her knowledge, perhaps about celestial magic, to the unborn child in unique ways, and this would also strengthen her bond with Laxus as they both look forward to the future together.
Laxus might become more tender and less brash. His focus would shift from just being a strong mage in the guild to being a father. Mirajane, on the other hand, would likely become even more nurturing. She already has a motherly side, but this would be amplified.
I'm not sure if there is a specific fanfic with that exact plot. There are a vast number of fanfics out there in the Fairy Tail fandom, but it would take some searching through various fanfic platforms to know for sure. Some popular fanfic sites like Archive of Our Own or FanFiction.net might be good places to start looking if you're interested in such a story.
There could also be other supporting characters from the Fairy Tail guild. For instance, Mirajane might play a role in giving advice to Lucy about pregnancy and motherhood, since she has a nurturing side. And Makarov, as the guild master, could be involved in ensuring the safety of Lucy and the future of the guild with a new member on the way.
Gray's character development could be quite significant. He might start to show his softer side more often. Usually, he's all about the ice - cold exterior, but now he has to think about a family. He could become more of a family man, putting Lucy and the baby's needs above his own. For Lucy, she'd grow in confidence. She'd have to be strong for the baby, and this would make her more assertive in the guild. She might also start to take on different roles, like teaching the younger members about family values that she's learning herself.
Lucy might become more protective and maternal. Since she has always been kind - hearted, her pregnancy could enhance her nurturing side. She would likely be more cautious about getting involved in dangerous battles and focus more on the safety of her unborn child. Sting, on the other hand, might become more responsible. As a dragon slayer, he is used to being carefree, but with a baby on the way, he would start thinking more about the future and providing for his family.
Well, a possible plot is that there are some dark forces that target Lucy because of her unborn child. Maybe they believe the baby will have some special powers. Laxus then has to go on a journey to find a way to protect them. And as for their relationship, it could be strained at first because of the stress, but they gradually grow closer as they face the challenges together. Plus, there could be a sub - plot about how Lucy's celestial spirits react to the news. Some might be overjoyed and offer their own unique forms of protection.
This situation could also bring out a softer side of Laxus that others in the guild haven't seen before. He'll be more affectionate towards Lucy, and they'll share a special bond over their unborn child. Their relationship will transform from just a couple to soon - to - be - parents, which is a huge shift that will be filled with both challenges and beautiful moments.
One great fanfiction could be 'A New Beginning for Laxus and Lucy'. It beautifully portrays their journey into parenthood. The author does an amazing job of showing how they adjust to the idea of having a baby and the changes it brings to their relationship.
The characters would develop in many ways. Harry could become more cautious as he has someone else to think about now. He may also struggle with the new identity of being a pregnant person in a world that doesn't expect it from him. Tom might find himself in a position where he has to make sacrifices for the first time, which could change his whole view of power and control.
If they travel to a future where things are very different, they might see new sides of each other. Laxus might see Lucy in a more confident and powerful role in the future, which could make him respect her even more. And Lucy might see Laxus in a more mellow or perhaps more burdened state, which could make her more empathetic towards him. This could lead to a deeper emotional connection between them.