I think Happy would be an interesting addition. Happy's positive attitude and ability to fly could come in handy in many situations. He could provide some comic relief while also being a useful ally. Another character could be Wendy. Wendy's healing magic would be very valuable in dangerous quests. She could also learn a lot from Erza and Lucy. And when paired with Natsu or Gray, they could form a really strong and diverse team for the fanfiction story.
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.
Jellal could be paired with them in a story. Given his complex past with Erza, it would add a lot of emotional depth to the story. His powerful magic could also be an asset in their adventures. And for Lucy, he could be a mentor - like figure in some ways, teaching her new ways to use her magic or knowledge about the magical world that she doesn't know yet. Also, Laxus could be a great character to include. His brute strength and his own moral code would create some interesting interactions with Lucy and Erza.
Jellal is often paired with Erza in fanfictions. Given their complex history, there's a lot of emotional depth that can be explored. There's also Lucy. Their friendship could potentially develop into something more in a fanfiction, and they can support each other in different ways, with Lucy's celestial magic and Erza's combat skills.
One well - known author in this genre is [Author Name 1]. Their stories often have really interesting plot twists involving Erza and Lucy. Another great author is [Author Name 2]. Their writing style is very engaging when it comes to depicting the relationship between the two characters. And then there's [Author Name 3], who is known for creating very detailed and immersive fanfictions about Erza and Lucy.
Natsu could be a great character to pair them with. Since he's also a dragon slayer, there could be some interesting interactions and competitions among them. They could learn from each other's dragon slayer techniques.
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.
In a crossover with 'One Piece', they could be paired with Luffy. Luffy's carefree and determined nature would contrast well with Freed and Laxus. They could all be on a quest to find a magical treasure that has power over both their worlds. Luffy's Gum - Gum powers would be interesting to see alongside Freed's rune magic and Laxus' lightning.
The ghastly space in this fanfiction could be a place where Erza and Lucy are sent as part of a mission gone wrong. They find themselves in a desolate and eerie landscape filled with floating rocks and strange energy currents. Erza quickly takes charge, assessing their situation. Lucy summons some of her stronger celestial spirits like Leo the Lion to help them navigate. As they move forward, they encounter a powerful dark mage who has been causing chaos in the ghastly space. Erza and Lucy combine their attacks, with Erza using her sword magic and Lucy using her star dress form. They manage to defeat the dark mage and in the process, they become more confident in their individual powers and their partnership within the Fairy Tail guild.
Kirby and Natsu would make a great pair. Natsu's fire - based magic and Kirby's ability to absorb and copy abilities could create some really cool combat combinations. They could both be hot - headed in their own ways and charge into battles without much hesitation.
Juvia is an obvious choice. Their relationship in the original series is full of interesting dynamics. Juvia's over - the - top love for Gray can lead to many comical and heartwarming situations in fanfiction. Another good option is Natsu. Their friendly rivalry can be explored further, like having them team up against a powerful enemy they couldn't defeat alone.
Lucy would also be a good pairing. She's intelligent and has a wide range of celestial spirits at her disposal. Sora could learn a lot from her about magic, and together they could use their different skills to solve mysteries or defeat enemies. Maybe Sora has some knowledge about the celestial world that Lucy doesn't, and they can share and grow together.
Natsu could be a great character to pair with Kinana. He's adventurous and his warm personality could bring out different sides of Kinana. Also, Gray would be an interesting choice. His cool and sometimes aloof nature could contrast well with Kinana's more reserved self. And Erza, with her strong leadership and warrior spirit, could form a great partnership with Kinana in a fanfiction, perhaps teaching her some combat skills.