Well, obviously she'll interact with her past self. It would be really interesting to see how she reacts to seeing a younger and more naive version of herself. She could also meet characters who are no longer alive in the present. For example, if there were any great wizards from the past who played important roles in the history of magic. Additionally, she might cross paths with some of the villains from the past who were causing trouble long before the current villains in the story. This could change her perspective on the whole conflict in the present.
There's also 'Lucy's New Beginnings'. This one is about male Lucy starting his journey in the magical world in a completely different way than in the original story. He meets different characters first and forms unique alliances. It's a long - form fanfiction that really develops his character well.
One great 'Lucy Heartfilia hurt' fanfiction is 'Bleeding Heart'. In this story, Lucy gets injured during a battle with a powerful dark wizard. The author does a wonderful job of portraying her pain and the concern of her guild mates. It really delves into her character and shows her strength even when she's physically and emotionally hurt.
First, focus on Lucy's emotions. Since she's pregnant, she'll have a whole range of feelings like joy, fear, and anticipation. Show how these emotions influence her actions and decisions. For example, she might be more cautious about going on missions. Second, develop the relationships around her. How do her friends and family react? Their reactions can also drive the story. Third, give her a goal related to the pregnancy, like ensuring a safe future for her child, and let her character grow as she tries to achieve that goal.
One idea could be exploring how Lucy's pregnancy affects her magic. Maybe she discovers new powers or has to adapt her existing ones. Another plot could focus on the reactions of her friends in the guild. They might be overjoyed and very protective. Also, a story could be written about how she prepares for the baby's arrival while still dealing with any threats to the guild or the magical world.
Death the Kid would be an extremely interesting character for Lucy to interact with. His obsession with symmetry and his powerful abilities as a meister could lead to some really unique scenarios. Lucy might be both fascinated and a bit put off by his quirks at first. But as they get to know each other, they could learn a great deal from one another. For example, Death the Kid could help Lucy understand the importance of precision in combat, which could enhance her use of celestial spirit magic, while Lucy could introduce him to the concept of celestial spirits and their different powers.
Another theme is the support of her friends. In many of these fanfictions, when Lucy is hurt, her Fairy Tail comrades come to her aid. It emphasizes the strong bonds within the guild and how they care for each other.
Another theme is the exploration of magic. Lucy has her celestial magic, and the OC usually has some form of unique magic as well. The fanfictions often explore how their different magics can work together or clash. It's interesting to see how the authors play with the magic system in the Fairy Tail universe to create new and exciting storylines for Lucy and the OC.
It gives writers the chance to explore different relationships. For example, how male Lucy would interact with the male characters in a different way than the female Lucy did. Maybe he has a different kind of bromance with Natsu or a more competitive relationship with Gray. It just adds a whole new layer to the story.
One great Lucy Heartfilia crossover fanfiction is 'Lucy in the World of Fairy Tail and Harry Potter'. It combines the magic of Fairy Tail with the wizarding world of Harry Potter in a really interesting way. The author does a great job of making Lucy fit into the new setting and interact with the characters from both universes.