Lucy could give Aquarius more freedom outside of the key. Let her experience the human world more often. They could go on adventures that are not related to Fairy Tail's main quests, just the two of them. This would allow them to get to know each other on a more personal level. Aquarius could also teach Lucy more about celestial magic and its deeper secrets, which would bring them closer as they explore this knowledge together.
One idea could be that Aquarius gets trapped in a different dimension, and Lucy has to go on a dangerous quest to rescue her. She might have to team up with some unexpected allies from Fairy Tail. Another plot could involve Aquarius losing her memory, and Lucy has to help her regain it while also protecting her from those who would take advantage of her in this vulnerable state.
Well, a plot idea might be that a powerful wizard wants to steal Aquarius' key from Lucy. Lucy has to fight to keep it. Along the way, she discovers that Aquarius has some hidden abilities that she didn't know about before. Another idea is that there is a prophecy about Lucy and Aquarius that they must fulfill together. They initially don't believe it but as events unfold, they realize they have to work as a team to save the world.
Their friendship can be developed by having them face a really tough challenge together. For example, if they are trapped in a dangerous magical maze. They would have to rely on each other's strengths. Lucy's intelligence and Aquarius' power could be combined to find a way out. This would deepen their bond.
One day in the Fairy Tail guild, Aquarius was feeling particularly moody. She was tired of being summoned just for water - related tasks. So, she decided to go on a little adventure of her own. She left the Celestial Spirit World and entered the human world without being summoned. She wandered around Magnolia, looking at all the strange human things. At first, she was a bit annoyed by the chaos, but then she started to find it interesting. She met some of the Fairy Tail members who were quite shocked to see her. But instead of causing trouble, Aquarius just wanted to explore and maybe find a new purpose beyond just being a tool for water magic.
Yes, in some Fairy Tail fanfictions, Aquarius can be depicted as dead. Fanfiction often takes creative liberties and may explore different storylines where beloved characters meet their end.
The relationships are important too. In 'fairy tail dom lucy fanfiction', her relationships with other guild members like Natsu, Gray, or Erza can be explored in different ways. Maybe there's a romantic sub - plot or a deep friendship that gets tested. It also often involves elements of magic, as Fairy Tail is a world full of magic. Lucy's magic might be enhanced or she might discover new forms of it, which drives the plot forward and makes for exciting adventures.
If Lucy never joined Fairy Tail, the friendships and relationships among the characters would form in a very different way. Also, many of the story arcs might not unfold as they do in the original plot.
One popular theme is Lucy's growth as a wizard. Fans often explore how she overcomes new challenges and becomes stronger. Another theme is her relationships, not just romantic ones but also her friendships within the guild. For example, her bond with Natsu and how they support each other through tough times.
The magic system in Fairy Tail should be well - represented. Since Lucy uses Celestial Spirit Magic and Rufus has Memory - Make Magic, there could be interesting battles or challenges where they combine their powers. For instance, Rufus could remember a weakness in an enemy's magic and Lucy could summon a Celestial Spirit to exploit that weakness.