Another theme could be growth. They both could grow as individuals, learning from each other's strengths and weaknesses. For example, if End is brave but impulsive and Lucy is cautious and intelligent, they can balance each other out. This growth can be both in terms of character and in their abilities. They might face challenges that force them to adapt and become better versions of themselves.
One possible plot could be a story of End and Lucy going on an adventure together. They might discover a hidden world full of magic and mystery. Along the way, they face challenges that test their friendship and courage.
Archive of Our Own (AO3) also has some really good 'Fairy Tail End x Lucy' fanfictions. The website has a well - organized tagging system that makes it easy to find stories with the exact themes and pairings you're interested in.
One interesting 'Fairy Tail End x Lucy' fanfiction could be the one where End and Lucy team up to fight a new and powerful dark magic user. In this fanfic, End's demon powers combined with Lucy's celestial magic create a unique and dynamic duo.
One great Lucy x Laxus fanfiction is 'A New Bond'. It focuses on how they start to rely on each other during a difficult mission. Their interactions are really well - written, with Lucy's kind heart slowly melting Laxus's tough exterior.
Often, you'll see the theme of trust. Since Aquarius can be a bit prickly and Lucy is so open - hearted, building trust between them can be a great plot point. Also, adventure is a theme. They might go on some wild adventures together, facing challenges that test their bond.
Often, there are themes of mutual understanding. As the two characters interact, they come to understand each other better. Also, some fanfictions might have a theme of sacrifice, where one of them is willing to sacrifice something for the other in the story. It's all about exploring different aspects of their relationship through these themes.
One common theme is the contrast between their natures. Loki is often portrayed as a complex and mischievous god, while Lucy is more down - to - earth and innocent. Their relationship then becomes a journey of understanding each other. Another theme is adventure. They usually embark on some sort of quest or adventure together. And the theme of transformation is also there, as both characters grow and change because of their relationship.
Friendship is a very common theme. Many fanfictions explore how Lucy and Lynn support each other through difficult times. For example, in some stories, one might be going through a personal crisis, and the other is there to offer comfort and solutions.