For a Fairy Tail Mard Geer fanfiction, Mirajane could be an excellent character to pair with him. Mirajane has her own dark past and her demon powers which could relate to Mard Geer in some ways. Their interactions could be full of mystery and tension. Laxus is another one. Laxus' brash and powerful personality would clash with Mard Geer's, creating a story full of action and power struggles. Additionally, Cana could be paired with Mard Geer. Cana's laid - back but also cunning nature could play off well against Mard Geer's more serious and evil demeanor.
One interesting plot idea could be exploring Mard Geer's past before he became a major antagonist in Fairy Tail. Maybe he had a relationship that was torn apart by the dark forces he later embraced. Another could be a what - if scenario where Mard Geer is redeemed and has to face the consequences of his past actions among the Fairy Tail guild members. A third idea is a fanfiction set in an alternate universe where Mard Geer is a hero instead of a villain, fighting against an even greater evil that threatens the world of Fairy Tail.
The OC's character can develop through conflict with Mard Geer. For instance, if Mard Geer attacks the OC's hometown in the fanfiction, it could fuel the OC's determination to become stronger and seek revenge. This would shape the OC into a more resilient and vengeful character.
In fanfiction, the relationship between Mard Geer and an OC can be quite diverse. It could be a relationship of enmity, where the OC stands against Mard Geer's evil plans in the Fairy Tail universe. Maybe the OC is a mage with unique powers that directly oppose Mard Geer's dark magic.
If the story is about male stoicism, the moral could be about the strength in not showing weakness. But again, it depends on the specific story.
Natsu would also be an interesting choice. Natsu's brash and impulsive nature could contrast well with Mystogan's more reserved and calculated personality. They could start off not getting along but then grow to respect each other during a difficult quest.
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.
Erza Scarlet would be a great character to pair with God Serena. She is a strong and determined mage, and their interactions could be filled with battles of wills and mutual respect. Another good option is Natsu Dragneel. Their different approaches to magic could lead to some interesting storylines, like a friendly rivalry. Gray Fullbuster could also work well. His cool - headedness could contrast with God Serena's more complex personality.