I'm not sure if there is an exact 'Naruto Pregnant Erza' fanfic. Fanfic topics can be very diverse, and this is a rather unusual crossover concept. You might try searching on some major fanfic websites like FanFiction.net or Archive of Our Own, but there's no guarantee you'll find one.
One common theme could be the anticipation and preparation for the new life. This might include scenes of the character getting the nursery ready or shopping for baby items.
There could be such a fanfiction. Fanfiction writers often come up with all kinds of creative and sometimes out - of - the - box ideas. However, I haven't personally come across one where Natsu gets Erza pregnant. It might be a rather niche concept within the Fairy Tail fanfiction community, as most fanfictions tend to focus on different aspects of the characters' relationships, like friendship, adventure - related partnerships, or other forms of romantic development.
The relationship could become more tender. Gray would be more caring towards Erza, always making sure she is comfortable. For example, he might bring her a warm blanket when she is resting.
One plot could be that Natsu becomes overly protective of Erza. He starts to take on extra jobs to save up for the baby. Meanwhile, the guild members also rally around them. Gray might tease Natsu about being a soon - to - be - dad, and Lucy could offer to help Erza with baby - related preparations like knitting baby clothes.
The main characters are Erza and Natsu. Erza is often portrayed as a strong and disciplined mage, while Natsu is a hot - headed and powerful dragon slayer.
One possible plot could be that they discover the pregnancy and then face challenges together. Maybe they have to deal with the reactions of their friends in the guild, some being happy and supportive while others might be worried about how it will affect their adventuring lives.
One possible plot could be that Erza discovers she's pregnant and has to deal with the shock while still being part of her guild and its adventures. She might worry about how it will affect her ability to fight and protect her friends.
In Erza's world, there could be a dark mage who wants to use the power of the unborn child for their own evil purposes. They might see the combination of Naruto's ninja abilities and Erza's magic in the child as a great source of power and will stop at nothing to get their hands on it.
Well, it could be a story where they initially struggle to accept the pregnancy. Gray might be a bit nervous about becoming a father, and Erza could be worried about how it will affect her role as a powerful mage. But as time goes on, they get excited and start making plans for their family.