One prevalent theme is the exploration of different universes or alternate realities. This allows for creative interpretations of their relationship. For example, they might meet in a parallel universe where their roles are slightly different. Additionally, themes of family and belonging can be intertwined. Steven, with his complex family situation, and Lars, who has his own insecurities, can form a unique family - like bond in fanfiction, which is often explored in various ways.
Since I don't encourage or promote yaoi fanfiction which often contains adult - like themes, I can't accurately state the common themes. However, in general fanfiction about two characters might focus on their emotional connection, like how they support each other through tough times.
One common theme is the exploration of unrequited love. Sometimes Lars has feelings for Sadie that she doesn't initially return, or vice versa. Another theme is friendship growth. They start as friends or acquaintances and slowly develop a stronger bond. Also, the theme of self - improvement is often there. As they interact, they both learn from each other and become better versions of themselves.
Acceptance is a key theme too. Steven accepts Lars as he is, with all his flaws, and Lars in turn starts to accept himself more. Fanfics might show how they help each other come to terms with their own identities, whether it's Steven's half - gem identity or Lars' insecurities about his place in Beach City.
One common theme is friendship development. Since their relationship starts as friends in the show, fan fiction often explores how that friendship deepens into something more. For example, they might write about shared experiences that bring them closer together.
One common theme is friendship. Since Steven and Lars have a complex relationship in the original series, many fanfics explore how their friendship can grow and develop further. Another theme could be self - discovery. They both go through personal growth in the show, and fanfics might expand on that journey for each of them in relation to their interactions with one another.
One common theme is probably the emotional hurt that Lars experiences. It could be related to his relationships, like with the other characters in the original work. For example, he might feel left out or misunderstood.
One common theme is self - discovery. Lars often goes on adventures where he learns more about himself and his capabilities. For example, in many fanfictions, he faces challenges that force him to re - evaluate his strengths and weaknesses.
In Emerald x Lars fanfiction, one often - seen theme is the idea of redemption. Maybe Lars has to prove himself to Emerald or vice versa. There's also the theme of mutual support. They might be in situations where they are the only ones who can support each other. Additionally, a theme of adventure can be present, where they embark on some kind of journey together, which helps to strengthen their relationship and develop their characters further.
One idea could be that Lars and Steven go on a space adventure together. They might encounter new gem species and have to work together to solve problems. For example, they could find a planet where the gems are in a civil war, and Lars and Steven use their unique skills to bring peace.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions, including many for 'Steven x Lars'. There are also fanfiction.net and Wattpad which might have some good ones. Just search for 'Steven x Lars' on these platforms and you'll likely find a bunch of stories.