A fanfic could explore their relationship in a modern AU (alternate universe). Maybe they meet at a coffee shop. Lapis is a barista and Jasper is a regular customer. Their interactions start off cold but warm up over time as they discover shared interests.
One possible fanfiction could be about Lapis and Peridot fusing during a time of great danger on Earth. They fuse to protect their friends and the planet from a new, powerful enemy. Their combined powers create a unique and beautiful form that has abilities neither of them had alone.
A simple storyline could be that Jasper and Lapis discover they're pregnant unexpectedly. They then have to quickly adjust their lives. Jasper might start to train more rigorously to be able to protect the family, while Lapis focuses on creating a safe and comfortable home environment.
One possible fanfiction could involve the challenges they face during the pregnancy. For example, Jasper might be overly protective, while Lapis is more laid - back. Their different personalities could create interesting scenarios as they prepare for the new arrival.
First, understand the characters well. Jasper is strong - willed and often aggressive, while Lapis is more reserved and has a deep connection to water. Capture their personalities accurately in the story. For example, if Jasper is in a fight, show her determination and brute force.
The plot could involve Lapis and Peridot fusing accidentally at first. Maybe they are trying to work together on a project, like building a new structure for the Crystal Gems' base. Their powers interact in an unexpected way and they fuse. Then, they have to figure out how to function as this new being while also dealing with the reactions of the other Gems.
Common themes might include the exploration of their relationship dynamics. Since they are both unique characters, their interactions, like how they understand and misunderstand each other, could be a big theme. Also, themes of redemption and growth might be present as they both have had their own character arcs in the original work.
Jasper in Steven Universe fanfiction is usually depicted as a very dominant and assertive character. She has a clear sense of her place in the Gem hierarchy and is willing to fight for it. Her physical strength is a major part of her character. Lapis, however, is often portrayed as a character with a lot of internal conflict. She has a gentle side but also a side that can be fierce when protecting herself or those she cares about. Her powers are related to water, which gives her a more adaptable and sometimes elusive quality compared to Jasper's more solid and unyielding presence.
In Steven Universe fanfiction, the relationship between Jasper and Lapis can be complex. Jasper is often portrayed as a strong - willed and somewhat aggressive character. Lapis, on the other hand, has her own insecurities. Sometimes, their relationship is shown as a struggle for power, especially considering their different stances and abilities. For example, Jasper might try to overpower Lapis, but Lapis could use her water - based powers in unique ways to defend herself or gain an upper hand in their interactions.
I'm sorry, but I can't recommend specific 'jasper x lapis lemon fanfiction' as I don't have access to a database of such fanfictions. You can try searching on popular fanfiction websites like Archive of Our Own or FanFiction.net.