There could be some great Gasper Vladi Lemon fanfiction out there. However, without more context about what you're looking for in such a fanfiction (like a particular genre, whether it's more action - oriented or character - focused), it's hard to give a definite recommendation. Maybe start by looking at the most popular ones on the relevant fandom websites and go from there.
Well, one common theme might be friendship. The characters of Gasper and Vladi could be depicted in various friendship - related scenarios, like helping each other out in difficult situations. Another could be adventure, where they go on exciting quests together.
Rias is another common character paired with Gasper. Since Rias is the leader of the peerage that Gasper is a part of, fanfiction might explore their relationship in terms of leadership and following. For example, how Rias helps Gasper to overcome his fears and grow as a member of the group.
Fanfiction could also develop Gasper by exploring his relationships in more detail. His friendships, his crushes, or his mentorships. For example, if he has a mentor figure who teaches him how to better control his powers, we can see how that relationship evolves over time and how it impacts Gasper's growth as a character. We can also see how his friendships are tested in tough situations, and how he responds, which would show his loyalty and the values he holds dear.
The Alex I Vladi love story could be a very romantic one. They might have met in a very special place, for example, at an art exhibition where they both had a passion for art. Their relationship could have developed slowly but steadily. Alex might have been attracted to Vladi's sense of humor and Vladi might have liked Alex's kindness. As time passed, their love grew stronger and they created a lot of precious memories together.
One common theme is friendship. Since Naruto is known for his strong bonds with others, when combined with Gasper in fanfics, their friendship often becomes a central focus. They might start off as strangers and then grow to trust and rely on each other.
When exploring fanfics, keep in mind the quality of writing. Look for ones with good grammar and engaging storylines. Some fanfics might focus on a particular aspect of their relationship, like how they support each other during difficult times in the Highschool DxD world, while others could be more light - hearted and focus on their daily interactions.
Another common theme is adventure. They often embark on various quests or face challenges together in the fanfic. For example, they might be fighting against common enemies in the supernatural realm. This not only tests their abilities but also strengthens their bond.
The popularity of Akeno and Gasper fanfic may lie in their contrasting personalities. Akeno is confident and powerful, while Gasper is shy and timid. This contrast creates interesting dynamics in the stories.
Another interesting one is 'The Friendship of Akeno and Gasper'. It focuses on the early days of their friendship, how they first met and started to trust each other. The author does a great job of portraying their initial awkwardness and the gradual development of a deep friendship.