Aqua's Keyblade has the power to unlock hearts and manipulate the flow of light and darkness. Erza's power is very physical, with her various swords and armors. In a joint effort, Aqua could use her Keyblade to purify any dark energy that might be affecting Erza in a fight. Erza, in return, could use her physical strength and combat skills to protect Aqua while she's performing more complex magical maneuvers. Their powers would be a great complement to each other, creating a dynamic and interesting combination in the fanfiction.
Well, in a Kingdom Hearts fanfiction involving Naruto and Aqua, their worlds could collide in many ways. Maybe Aqua could end up in the Naruto world through some sort of portal mishap. She might be seen as a strange and powerful ninja - like figure. Naruto, being the curious and friendly character he is, would likely approach her. And they could team up against common enemies. For example, if there were dark forces threatening both their worlds, they could combine their unique skills. Naruto's shadow clones and Aqua's magic could create some really interesting battle strategies.
Their interaction would likely be a bit cautious at first. Sora might be in awe of Aqua as she is an experienced Keyblade wielder. Aqua would probably be a bit guarded but also curious about Sora.
I'm not sure there is an official 'sexy' version of the Kingdom Hearts Aqua story. In the regular Kingdom Hearts, Aqua is a keyblade wielder. She is strong and brave. She embarks on a journey to protect her friends and the worlds from the forces of darkness. She has to face many challenges and enemies along the way.
One idea could be a crossover adventure where Aqua and Erza team up to face a powerful dark force. Maybe they start off as rivals, with Aqua's Keyblade skills and Erza's swordsmanship clashing in a misunderstanding. But as they realize they share a common enemy, they combine their powers. Aqua could use her magic to support Erza's more direct combat approach.
One great fanfiction is 'Aqua and Terra's Reunion' which beautifully explores their relationship post the events in the game. It delves deep into their emotional connection and how they support each other in rebuilding their world.
In a crossover fanfiction, Aqua could be paired well with Mickey Mouse. Mickey has a deep understanding of the Kingdom Hearts universe and his magic could complement Aqua's Keyblade abilities. They could embark on a journey together to uncover some ancient secrets that are crucial to both their worlds. Also, Elsa from Frozen could be a great pairing. Elsa's ice powers and her struggle with her own identity could find an interesting parallel with Aqua's journey and her powers. They could help each other grow and face challenges together.
Well, 'The Adventures of Aqua and Her OC Companion' is also a good one. It starts with the OC getting lost in the Realm of Darkness and Aqua finding them. From there, they embark on a journey to find a way out while also uncovering secrets about the OC's past. It has a lot of action and some really touching moments between Aqua and the OC.
Aqua's pregnancy in fanfiction could bring out different sides of her character. She may become more cautious, yet also more determined to fight for a better future for her child. Fanwriters could explore how her pregnancy affects her relationship with her Keyblade, whether it becomes a tool to protect her child more fiercely or if she has to find new ways to use it while pregnant.
The Keyblade wielders like Sora, Riku, and Kairi would bring a sense of adventure and a different kind of magic to Equestria. The ponies, on the other hand, could teach them about the power of friendship in a more direct way. Donald and Goofy might be a bit startled by the ponies at first but would soon get used to them. Donald's magic could be compared to the magic of some of the unicorn ponies, and they could exchange magical knowledge.
There could be many interesting storylines in fanfiction regarding Aqua's pregnancy. It might involve her dealing with the challenges of being a Keyblade wielder while pregnant, perhaps having to protect her unborn child from the Heartless. Another aspect could be how her friends in the Kingdom Hearts universe react to the news and support her throughout.