Loke, as one of Lucy's Celestial Spirits, has a special connection with her already. In fanfiction, this could be developed into a romantic relationship. He could protect Lucy in a more personal way, and their relationship could explore the boundaries between a spirit and a human in a unique and exciting way.
Gray could be another great pairing. The contrast between his cool - headedness and Lucy's more emotional nature could create interesting storylines. For instance, they might be forced to work together on a mission where their differences initially cause problems but later lead to a stronger bond.
One interesting plotline could be a magic - based adventure where Erza and Lucy team up against a powerful dark mage. They might use their unique magical abilities in tandem, like Erza's requip magic and Lucy's celestial spirit magic to overcome challenges. For example, they could be on a quest to retrieve a powerful magical artifact that has been stolen by the dark mage. Along the way, they strengthen their friendship and learn new magical techniques from each other.
Natsu could be a great character to pair them with. Natsu's fiery and impulsive nature would contrast well with Lucy's more level - headed and Erza's strict personality. They could all go on an adventure together, with Natsu leading the charge into dangerous situations, Lucy using her celestial spirits for support, and Erza keeping them in line. Gray is also a good option. His cool - headedness and ice - make magic could add an interesting dynamic to the group, especially when paired with Natsu's fire magic and the celestial and re - equip magic of Lucy and Erza.
Natsu would be a likely character to comfort Lucy. He's her close friend and often there for her. His warm and energetic nature could cheer her up. Another one could be Erza. Erza is strong and reliable, and she has a soft spot for her guildmates. She would probably offer Lucy some wise words and a shoulder to cry on. Happy, the little blue exceed, might also be there. His cute antics and friendly presence could make Lucy feel better.
Natsu would be a very likely character. Since he and Lucy are close friends in the original story, if Lucy travels back in time, Natsu might be one of the first people she seeks out. They could have adventures together in the past, with Natsu being his usual impulsive self and Lucy having to keep him in check with her knowledge of the future.
One interesting crossover could be a story where Naruto's ninja skills are combined with Fairy Tail's magic system. Lucy could use her celestial spirit powers along with Naruto's shadow clone jutsu for a unique battle strategy. As for Lemon, perhaps she could be a new character introduced in this crossover world with some special abilities that interact with both Naruto and Fairy Tail elements.
A plotline could also involve Lucy having to team up with an unlikely group of characters, perhaps some former enemies or characters from other guilds. Together, they have to face a common threat that is much larger than any of them could handle alone. This forces Lucy to use her wits and her magic in new and creative ways, and also develops her relationships with these new allies in unexpected ways.
One popular theme could be friendship. In Fairy Tail, friendship is a strong element, and in Lucy - centered fanfictions, it might show how her friendships, especially with characters like Natsu, develop in new and interesting ways. For example, they could go on a different kind of adventure together that wasn't in the original series.
Yes, there are some out there. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. However, the 'lemon' aspect might make it a bit more difficult to find as some sites have restrictions on explicit content. You may need to search specifically for 'Fairy Tail Lucy x Sting romance' if you don't want the more adult - themed stories.
Naruto would likely be curious about the magic in the Fairy Tail world. He might see Lucy's celestial spirit magic as similar to his own summoning jutsu in a way. As for Lemon, if she has a friendly personality, Naruto would probably befriend her quickly. Fairy Tail characters, on the other hand, would be intrigued by Naruto's ninja abilities. They might ask him to show off some of his cool jutsus. Lucy could potentially teach Naruto about the different types of magic in Fairy Tail, while Lemon could offer her own unique perspective on things.
In Fairy Tail fanfiction, Dark Lucy often represents a more complex and edgy version of the character. She might be portrayed as having a darker past or different powers. For example, she could have been influenced by some dark magic which changed her personality. This can add a new layer of depth to the Fairy Tail universe.