Based on the title 'nalu love story', it seems that the main characters are probably named Nalu. But without more information, it's difficult to know if there are other important characters involved.
Obviously, Natsu and Lucy are the central figures. Natsu is typically portrayed as a bit of a troublemaker in a fun way, with a heart of gold. He might be the popular jock type. Lucy is usually the studious and kind - hearted girl. Their interactions in high school, whether it's in the classroom, at school events, or just hanging out, form the basis of the love story in the fanfiction.
Well, the main characters are usually Natsu and Lucy. Natsu, with his dragon - slayer magic, is a powerful fighter. Lucy, on the other hand, has her celestial spirits to aid her in battles during the war scenarios in these fanfictions.
Obviously, Natsu and Lucy are the main characters. In this 'nalu pregnant fanfic', they are the ones whose lives are about to change completely. Natsu, with his fiery personality, will have to learn to be more gentle and patient. Lucy, on the other hand, will use her wits and nurturing side to get ready for motherhood. Their friends from the guild may also play important supporting roles, but Natsu and Lucy are the stars of this story.
Obviously, Nalu is the main focus. There could be other characters as well, like their friends who might try to calm them down during their angry lemon - related spat. But Nalu is definitely the central characters in this fanfiction.
If it's based on the 'nalu' concept which often comes from Fairy Tail, the main characters are likely Natsu and Lucy. Since it's about a 'dragon's mate', Natsu, who has dragon - slayer magic and a connection to dragons, would be a key character. Lucy might be the 'mate' in this story, or they both could be involved in a plot related to dragons and their relationship in a more complex way.
The two main characters are without a doubt Natsu and Lucy. Natsu, with his dragon - like instincts and love for a good fight, and Lucy, with her collection of celestial keys and her dreamy nature. In the context of their married life in fanfiction, they are the focus. Their friends might also make appearances, but the story mainly revolves around Natsu and Lucy's relationship, whether it's a romantic dinner date or a battle they face together as a married couple.
The main characters are clearly Natsu and Lucy. Natsu, with his fiery and impulsive nature, is likely to be there to encourage and sometimes push Lucy in her journey to get stronger. His dragon slayer magic might also play a role in training her or protecting her during dangerous situations.
The main characters are obviously Igneel, and his grandkids. Nalu might also be involved in some way, perhaps as the parents of the grandkids.
Obviously, Natsu and Lucy would be the main characters. They are the core of the 'nalu' relationship. Their relationship is central to the fanfic, and the family aspect would likely revolve around them.
Well, without more context, it could be anyone. It might be a young couple from different social classes, like Romeo and Juliet.