One plot idea could be that Gray and Juvia discover the pregnancy and Gray is initially in shock but then becomes overjoyed. He starts preparing for the baby by fixing up their living space. Another idea is that Juvia has a difficult pregnancy and Gray has to be extra supportive, taking on more of the household chores and being by her side at all doctor's appointments.
Perhaps a plot twist could involve some sort of magic that endangers Juvia's pregnancy. Gray then has to go on a dangerous quest to find a cure or a way to protect Juvia and the unborn child. He might have to face his own inner demons along the way as well, since he has always been a bit of a loner and this new responsibility scares him.
One possible storyline could be that Gray and Juvia are excited about the pregnancy but also nervous. Gray might be worried about being a good father, as he has had a somewhat troubled past. Juvia, on the other hand, is overjoyed and starts preparing for the baby right away. They could face challenges like finding a suitable place to live as a family, and also dealing with the reactions of their friends in Fairy Tail. Maybe some of their friends are super supportive, while others might be a bit more hesitant or worried for them.
Financial issues could be a big challenge. They need to think about how to afford things like a bigger place to live, baby clothes, and food for the baby.
The main characters are Gray and Juvia. Gray is often depicted as a cool - headed and powerful mage, while Juvia is a loving and somewhat obsessive (in a cute way) character when it comes to Gray.
One idea could be that they face challenges in preparing for the baby's arrival. Maybe they struggle to find a suitable place to live as a family. Another could be that their friends in the guild throw a big, fun baby shower for them.
One idea could be a story where Juvia and Gray get trapped in a magical realm together. In this realm, their powers are altered in strange ways, and they have to rely on each other more than ever. They start to discover new aspects of their relationship as they face various challenges.
One idea could be a story where Juvia, Lyon, and Gray have to team up to face a powerful dark wizard that is threatening the Fairy Tail guild. They start off with some tension due to their past relationships, especially between Gray and Lyon who have a rivalry, but as they battle, they learn to work together better. Juvia could also be in a position where she has to choose between protecting Gray or following Lyon's more strategic plans, adding an interesting love - triangle - like dynamic to the plot.
A great plot might involve Gray and Juvia adopting a child. The child could come from a troubled background and be initially distrustful of them. Gray and Juvia would have to work hard to gain the child's trust. Along the way, they could also teach the child about magic and the importance of family in the Fairy Tail guild. As the story progresses, the family unit grows stronger and they become an inspiration to other members of the guild.
Well, perhaps Juvia might punish Gray for always being cold and distant towards her in a comical way. Maybe she could freeze his clothes every time he ignores her feelings.
The plot could involve Gray and Lucy dealing with the challenges of pregnancy. For example, Lucy might have a difficult pregnancy with some health scares. Gray would be by her side, using his ice magic to keep her cool during hot flashes. Their friends might be concerned and offer different kinds of support. In the end, they welcome a healthy baby into the world.