Well, the plot could be centered around a misunderstanding. The guild might think Lisanna is a better fit for certain things because of a false impression. As a result, Lucy is pushed to the side. But as the story unfolds, they realize their mistake. Lisanna could also feel guilty about taking Lucy's place without really intending to, and they both have to work through their feelings and the situation.
The plot could involve jealousy. Lucy might become jealous of Lisanna as she takes over her position in the guild. This could drive Lucy to train harder and become more independent. Maybe she'll find a new group of friends or allies who see her value outside of the guild.
In such a fanfiction, the plot may have Lisanna being used as a tool by an antagonist. The antagonist manipulates the guild into believing Lisanna is better than Lucy for some hidden agenda. Lucy then has to not only fight to regain her place in the guild but also uncover the real reason behind her replacement. This could involve her teaming up with unlikely allies and facing challenges that test her strength and loyalty to the guild.
In a fanfiction of Lucy being replaced by Lisanna, it might explore the emotional turmoil of Lucy. She could be heartbroken seeing how easily she was seemingly replaced. Meanwhile, Lisanna might not be fully aware of the situation or might be caught up in the sudden popularity. This could create a rift not only between Lucy and Lisanna but also within the guild as a whole. Some members might side with Lucy, feeling that she was unjustly pushed aside, while others might be excited about Lisanna's presence and not understand Lucy's pain.
Lucy could face isolation. People in the fanfiction world might avoid her, and she could be left all alone. This could also lead to her losing confidence in herself as she is constantly being blamed for something she didn't do.
In the fanfiction world, it might be part of a bigger plot against Lucy. There could be a character who is jealous of Lucy's relationship with other characters. So, they decide to frame her for hurting Lisanna as a way to get her in trouble and drive a wedge between her and her friends.
Well, one possibility could be that Naruto is somehow transported to the Fairy Tail world where Lisanna is in danger. Maybe there's a dark magic user threatening her. Naruto, with his ninja skills like shadow clones and rasengan, could fight off the bad guys and save Lisanna. His determination and never - give - up attitude would shine through in this situation.
Common themes in this type of fanfiction often revolve around change. The oc replacing Lucy is a big change in the story's dynamic. This can lead to themes like acceptance - both the oc having to accept their new situation and the other characters in the story having to accept the oc in Lucy's place. Another theme could be exploration. The oc might explore aspects of the story world that Lucy either didn't get to or did in a different way. It could also be about challenging the status quo. Since the oc is a new element, they might disrupt the normal flow of the story and bring about new ideas or ways of doing things, which is an interesting theme to explore in this kind of fanfiction.
One possible plot could be that Lisanna and Bixlow accidentally end up in a situation where they have to take care of a baby together. Maybe they find a lost baby in the forest while on a mission. As they care for the baby, they start to see each other in a new light and develop feelings for one another.
A plot could be that Natsu and Lisanna have been longing for a baby. They go through a magical ritual in their guild to increase their chances of having a child. Once Lisanna becomes pregnant, the whole guild gets involved. Everyone is excited and offers their help. Natsu becomes super protective of Lisanna and the unborn baby. There could be a sub - plot where an enemy tries to target Lisanna because of the powerful baby she is carrying, and Natsu has to fight to keep them safe.
In this fanfiction, the plot might be centered around Karin replacing Sakura in a mission or a task within the fictional world. For example, if they are in a ninja - like setting, Karin could use her unique abilities instead of Sakura's to achieve a certain goal. This could lead to different interactions with other characters who were used to working with Sakura.
Well, perhaps in the fanfiction, Natsu and Lisanna discover they're having a baby unexpectedly. They then have to adjust their lives as members of Fairy Tail. Lisanna might worry about how her pregnancy will affect her ability to go on missions. Natsu, on the other hand, vows to be the best father and to keep his family safe from any threats that may come their way, be it from dark guilds or other magical creatures.
One possible plot could be that they discover the pregnancy and start preparing for the new arrival. They might face challenges like how to balance their duties in the guild with the upcoming parenthood. Natsu could be overly excited but also a bit clueless at first.